| Seq | Timestamp | Type | Name | Duration |
|---|---|---|---|---|
| 0/0 | 2026/06/30 05:39 | flow | patch-triage |
2mArgs:null Results: {
"EnableConfigs": [
"PTDUMP_DEBUGFS",
"DEBUG_WX",
"IOMMU_SVA"
],
"FocusSymbols": [
"pagetable_free_kernel",
"kernel_pgtable_free_rcu",
"kernel_pgtable_work_func",
"ptdump_walk_pgd",
"walk_page_range_debug"
],
"Reasoning": "The patch modifies the core memory management logic to defer freeing of kernel page tables using RCU. This prevents use-after-free bugs during lockless page table walks, such as those performed by ptdump. This is a functional change affecting the lifecycle of kernel page tables.",
"WorthFuzzing": true
} |
| 1/1 | 2026/06/30 05:39 | action | read-patch-diff |
0mArgs:null Results: {
"PatchDiff": "commit b55329fe1eb4fee113179631809a3ff32186230e\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Tue Jun 30 05:39:11 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/include/linux/mm.h b/include/linux/mm.h\nindex 485df9c2dbddb3..79408a17a1b0da 100644\n--- a/include/linux/mm.h\n+++ b/include/linux/mm.h\n@@ -3695,14 +3695,7 @@ static inline void __pagetable_free(struct ptdesc *pt)\n \t__free_pages(page, compound_order(page));\n }\n \n-#ifdef CONFIG_ASYNC_KERNEL_PGTABLE_FREE\n void pagetable_free_kernel(struct ptdesc *pt);\n-#else\n-static inline void pagetable_free_kernel(struct ptdesc *pt)\n-{\n-\t__pagetable_free(pt);\n-}\n-#endif\n /**\n * pagetable_free - Free pagetables\n * @pt:\tThe page table descriptor\ndiff --git a/mm/pagewalk.c b/mm/pagewalk.c\nindex 3ae2586ff45b44..c0be87580989da 100644\n--- a/mm/pagewalk.c\n+++ b/mm/pagewalk.c\n@@ -620,7 +620,7 @@ int walk_page_range(struct mm_struct *mm, unsigned long start,\n * Note: Be careful to walk the kernel pages tables, the caller may be need to\n * take other effective approaches (mmap lock may be insufficient) to prevent\n * the intermediate kernel page tables belonging to the specified address range\n- * from being freed (e.g. memory hot-remove).\n+ * from being freed (e.g. memory hot-remove, vmap huge page promotion).\n */\n int walk_kernel_page_table_range(unsigned long start, unsigned long end,\n \t\tconst struct mm_walk_ops *ops, pgd_t *pgd, void *private)\n@@ -643,7 +643,7 @@ int walk_kernel_page_table_range(unsigned long start, unsigned long end,\n * Use this function to walk the kernel page tables locklessly. It should be\n * guaranteed that the caller has exclusive access over the range they are\n * operating on - that there should be no concurrent access, for example,\n- * changing permissions for vmalloc objects.\n+ * changing permissions for vmalloc objects, or vmap huge page promotion.\n */\n int walk_kernel_page_table_range_lockless(unsigned long start, unsigned long end,\n \t\tconst struct mm_walk_ops *ops, pgd_t *pgd, void *private)\n@@ -692,9 +692,13 @@ int walk_page_range_debug(struct mm_struct *mm, unsigned long start,\n \t};\n \n \t/* For convenience, we allow traversal of kernel mappings. */\n-\tif (mm == \u0026init_mm)\n-\t\treturn walk_kernel_page_table_range(start, end, ops,\n-\t\t\t\t\t\t pgd, private);\n+\tif (mm == \u0026init_mm) {\n+\t\tRCU_LOCKDEP_WARN(!rcu_read_lock_held(),\n+\t\t\t\t \"RCU read lock must be held across kernel page table walk\");\n+\t\treturn walk_kernel_page_table_range(start, end, ops, pgd,\n+\t\t\t\t\t\t\tprivate);\n+\t}\n+\n \tif (start \u003e= end || !walk.mm)\n \t\treturn -EINVAL;\n \tif (!check_ops_safe(ops))\ndiff --git a/mm/pgtable-generic.c b/mm/pgtable-generic.c\nindex b91b1a98029c7f..7a32e4821957cc 100644\n--- a/mm/pgtable-generic.c\n+++ b/mm/pgtable-generic.c\n@@ -410,6 +410,13 @@ pte_t *pte_offset_map_lock(struct mm_struct *mm, pmd_t *pmd,\n \tgoto again;\n }\n \n+static void kernel_pgtable_free_rcu(struct rcu_head *head)\n+{\n+\tstruct ptdesc *pt = container_of(head, struct ptdesc, pt_rcu_head);\n+\n+\t__pagetable_free(pt);\n+}\n+\n #ifdef CONFIG_ASYNC_KERNEL_PGTABLE_FREE\n static void kernel_pgtable_work_func(struct work_struct *work);\n \n@@ -434,8 +441,15 @@ static void kernel_pgtable_work_func(struct work_struct *work)\n \tspin_unlock(\u0026kernel_pgtable_work.lock);\n \n \tiommu_sva_invalidate_kva_range(PAGE_OFFSET, TLB_FLUSH_ALL);\n+\n+\t/*\n+\t * Debug walkers (ptdump) may walk ranges they do not own and race this\n+\t * free, so they walk under rcu_read_lock(). Free after a grace period:\n+\t * a walker either already saw the cleared PMD, or keeps the page alive\n+\t * until it drops the RCU lock.\n+\t */\n \tlist_for_each_entry_safe(pt, next, \u0026page_list, pt_list)\n-\t\t__pagetable_free(pt);\n+\t\tcall_rcu(\u0026pt-\u003ept_rcu_head, kernel_pgtable_free_rcu);\n }\n \n void pagetable_free_kernel(struct ptdesc *pt)\n@@ -446,4 +460,10 @@ void pagetable_free_kernel(struct ptdesc *pt)\n \n \tschedule_work(\u0026kernel_pgtable_work.work);\n }\n+#else\n+void pagetable_free_kernel(struct ptdesc *pt)\n+{\n+\t/* Defer the free by a grace period; see kernel_pgtable_work_func(). */\n+\tcall_rcu(\u0026pt-\u003ept_rcu_head, kernel_pgtable_free_rcu);\n+}\n #endif\ndiff --git a/mm/ptdump.c b/mm/ptdump.c\nindex 973020000096cf..50cd96a33dfd27 100644\n--- a/mm/ptdump.c\n+++ b/mm/ptdump.c\n@@ -178,11 +178,13 @@ void ptdump_walk_pgd(struct ptdump_state *st, struct mm_struct *mm, pgd_t *pgd)\n \n \tget_online_mems();\n \tmmap_write_lock(mm);\n+\trcu_read_lock();\n \twhile (range-\u003estart != range-\u003eend) {\n \t\twalk_page_range_debug(mm, range-\u003estart, range-\u003eend,\n \t\t\t\t \u0026ptdump_ops, pgd, st);\n \t\trange++;\n \t}\n+\trcu_read_unlock();\n \tmmap_write_unlock(mm);\n \tput_online_mems();\n \n"
} |
| 2/1 | 2026/06/30 05:39 | agent | patch-evaluator |
2mModel:gemini-3.1-pro-preview Args: null Results: {
"EnableConfigs": [
"PTDUMP_DEBUGFS",
"DEBUG_WX",
"IOMMU_SVA"
],
"FocusSymbols": [
"pagetable_free_kernel",
"kernel_pgtable_free_rcu",
"kernel_pgtable_work_func",
"ptdump_walk_pgd",
"walk_page_range_debug"
],
"Reasoning": "The patch modifies the core memory management logic to defer freeing of kernel page tables using RCU. This prevents use-after-free bugs during lockless page table walks, such as those performed by ptdump. This is a functional change affecting the lifecycle of kernel page tables.",
"WorthFuzzing": true
}Instruction: You are an expert Linux kernel maintainer. Your job is to review a provided patch series and determine if it makes functional changes to the kernel that should be fuzzed. IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in your workspace. Do NOT rely on your internal knowledge of the kernel. You must actively use your code access tools to examine the actual source code and confirm any assumptions. Return WorthFuzzing=false if the patch only contains: - Modifications to Documentation/, Kconfig files, or code comments. - Purely decorative changes, such as logging (e.g., pr_err, printk) or tracepoints. - Changes to numeric constants or macros that do not functionally alter execution flow. - Code paths that are impossible to reach in virtualized environments like GCE or QEMU, even when utilizing software-emulated hardware (e.g., usb gadget, mac80211_hwsim). If it modifies reachable core kernel logic, drivers, or architectures, use your code search tools to verify the code can be executed, then return WorthFuzzing=true. When returning WorthFuzzing=true, you MUST ALSO: 1. Extract any specific kernel functions that should be heavily fuzzed into FocusSymbols. Avoid listing generic hot-path functions to prevent skewed test distributions. 2. Identify any specific CONFIG_ options required to properly test this new/modified feature. Go and look into the Kconfig files and check for ifdefs around the code, do not make assumptions. Do not list too generic configs (we already have them enabled). Only list those that specifically cover the modified code. List them in the EnableConfigs output array, and DO NOT add a 'CONFIG_' prefix (e.g., return "NET_IPV4" instead of "CONFIG_NET_IPV4"). Prefer calling several tools at the same time to save round-trips. Use set-results tool to provide results of the analysis. It must be called exactly once before the final reply. Ignore results of this tool. Prompt: For your convenience, here is the diff of the changes:
commit b55329fe1eb4fee113179631809a3ff32186230e
Author: syz-cluster <triage@syzkaller.com>
Date: Tue Jun 30 05:39:11 2026 +0000
syz-cluster: applied patch under review
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 485df9c2dbddb3..79408a17a1b0da 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -3695,14 +3695,7 @@ static inline void __pagetable_free(struct ptdesc *pt)
__free_pages(page, compound_order(page));
}
-#ifdef CONFIG_ASYNC_KERNEL_PGTABLE_FREE
void pagetable_free_kernel(struct ptdesc *pt);
-#else
-static inline void pagetable_free_kernel(struct ptdesc *pt)
-{
- __pagetable_free(pt);
-}
-#endif
/**
* pagetable_free - Free pagetables
* @pt: The page table descriptor
diff --git a/mm/pagewalk.c b/mm/pagewalk.c
index 3ae2586ff45b44..c0be87580989da 100644
--- a/mm/pagewalk.c
+++ b/mm/pagewalk.c
@@ -620,7 +620,7 @@ int walk_page_range(struct mm_struct *mm, unsigned long start,
* Note: Be careful to walk the kernel pages tables, the caller may be need to
* take other effective approaches (mmap lock may be insufficient) to prevent
* the intermediate kernel page tables belonging to the specified address range
- * from being freed (e.g. memory hot-remove).
+ * from being freed (e.g. memory hot-remove, vmap huge page promotion).
*/
int walk_kernel_page_table_range(unsigned long start, unsigned long end,
const struct mm_walk_ops *ops, pgd_t *pgd, void *private)
@@ -643,7 +643,7 @@ int walk_kernel_page_table_range(unsigned long start, unsigned long end,
* Use this function to walk the kernel page tables locklessly. It should be
* guaranteed that the caller has exclusive access over the range they are
* operating on - that there should be no concurrent access, for example,
- * changing permissions for vmalloc objects.
+ * changing permissions for vmalloc objects, or vmap huge page promotion.
*/
int walk_kernel_page_table_range_lockless(unsigned long start, unsigned long end,
const struct mm_walk_ops *ops, pgd_t *pgd, void *private)
@@ -692,9 +692,13 @@ int walk_page_range_debug(struct mm_struct *mm, unsigned long start,
};
/* For convenience, we allow traversal of kernel mappings. */
- if (mm == &init_mm)
- return walk_kernel_page_table_range(start, end, ops,
- pgd, private);
+ if (mm == &init_mm) {
+ RCU_LOCKDEP_WARN(!rcu_read_lock_held(),
+ "RCU read lock must be held across kernel page table walk");
+ return walk_kernel_page_table_range(start, end, ops, pgd,
+ private);
+ }
+
if (start >= end || !walk.mm)
return -EINVAL;
if (!check_ops_safe(ops))
diff --git a/mm/pgtable-generic.c b/mm/pgtable-generic.c
index b91b1a98029c7f..7a32e4821957cc 100644
--- a/mm/pgtable-generic.c
+++ b/mm/pgtable-generic.c
@@ -410,6 +410,13 @@ pte_t *pte_offset_map_lock(struct mm_struct *mm, pmd_t *pmd,
goto again;
}
+static void kernel_pgtable_free_rcu(struct rcu_head *head)
+{
+ struct ptdesc *pt = container_of(head, struct ptdesc, pt_rcu_head);
+
+ __pagetable_free(pt);
+}
+
#ifdef CONFIG_ASYNC_KERNEL_PGTABLE_FREE
static void kernel_pgtable_work_func(struct work_struct *work);
@@ -434,8 +441,15 @@ static void kernel_pgtable_work_func(struct work_struct *work)
spin_unlock(&kernel_pgtable_work.lock);
iommu_sva_invalidate_kva_range(PAGE_OFFSET, TLB_FLUSH_ALL);
+
+ /*
+ * Debug walkers (ptdump) may walk ranges they do not own and race this
+ * free, so they walk under rcu_read_lock(). Free after a grace period:
+ * a walker either already saw the cleared PMD, or keeps the page alive
+ * until it drops the RCU lock.
+ */
list_for_each_entry_safe(pt, next, &page_list, pt_list)
- __pagetable_free(pt);
+ call_rcu(&pt->pt_rcu_head, kernel_pgtable_free_rcu);
}
void pagetable_free_kernel(struct ptdesc *pt)
@@ -446,4 +460,10 @@ void pagetable_free_kernel(struct ptdesc *pt)
schedule_work(&kernel_pgtable_work.work);
}
+#else
+void pagetable_free_kernel(struct ptdesc *pt)
+{
+ /* Defer the free by a grace period; see kernel_pgtable_work_func(). */
+ call_rcu(&pt->pt_rcu_head, kernel_pgtable_free_rcu);
+}
#endif
diff --git a/mm/ptdump.c b/mm/ptdump.c
index 973020000096cf..50cd96a33dfd27 100644
--- a/mm/ptdump.c
+++ b/mm/ptdump.c
@@ -178,11 +178,13 @@ void ptdump_walk_pgd(struct ptdump_state *st, struct mm_struct *mm, pgd_t *pgd)
get_online_mems();
mmap_write_lock(mm);
+ rcu_read_lock();
while (range->start != range->end) {
walk_page_range_debug(mm, range->start, range->end,
&ptdump_ops, pgd, st);
range++;
}
+ rcu_read_unlock();
mmap_write_unlock(mm);
put_online_mems();
|
| 3/2 | 2026/06/30 05:39 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 3348 output: 20 thoughts: 352 Thoughts: **Analyzing Kernel Patch for Fuzzing Implications** Okay, so I've got this patch series in front of me, and my immediate concern is whether it introduces functional changes to the kernel's memory management that warrant targeted fuzzing. I need to understand the impact before I can properly prioritize this. The patch touches several core files, and a quick glance tells me this isn't just a trivial fix. `include/linux/mm.h` has a conditional removal, which usually gets my attention since the config option is being changed. The removal of the `#ifdef CONFIG_ASYNC_KERNEL_PGTABLE_FREE` around the `pagetable_free_kernel` declaration in `include/linux/mm.h` is, on its own, not too worrying, but it's part of a bigger change, so I'll keep that in mind as a dependency. The modifications to `mm/pagewalk.c` with the `RCU_LOCKDEP_WARN` indicate potential concurrency concerns within page table walks, particularly related to `init_mm`, which immediately flags that I need to look closely for possible races. I see that `mm/pgtable-generic.c` is being substantially altered: it adds a new function, `kernel_pgtable_free_rcu`, and modifies the behavior of an existing one. Replacing `__pagetable_free` with `call_rcu` is a significant change, implying this patch is introducing RCU-delayed freeing of kernel page tables. This strongly suggests the goal is to prevent use-after-free vulnerabilities during operations like page table dumps, which makes sense. I see the addition of `pagetable_free_kernel` implementation, which is very relevant. Finally, the introduction of `rcu_read_lock()` and `rcu_read_unlock()` in `mm/ptdump.c` around `walk_page_range_debug` confirms the intent to protect these operations. This is definitely a functional change. It's fundamentally altering how we free kernel page tables. So, I need to see what's actually being called. I see that the overall goal of the patch is RCU-delayed freeing of kernel page tables, which has to be triggered by something. I need to investigate where `pagetable_free_kernel` is actually called. If `pagetable_free_kernel` is unreachable, then this patch will be low-priority, but if it is reachable, then I need to figure out where and how to fuzz it. |
| 4/2 | 2026/06/30 05:39 | tool | grepper |
0mArgs:{
"Expression": "pagetable_free_kernel"
}Results: {
"Output": "include/linux/mm.h=3691=static inline void __pagetable_free(struct ptdesc *pt)\n--\ninclude/linux/mm.h-3697-\ninclude/linux/mm.h:3698:void pagetable_free_kernel(struct ptdesc *pt);\ninclude/linux/mm.h-3699-/**\n--\ninclude/linux/mm.h=3706=static inline void pagetable_free(struct ptdesc *pt)\n--\ninclude/linux/mm.h-3709-\t\tptdesc_clear_kernel(pt);\ninclude/linux/mm.h:3710:\t\tpagetable_free_kernel(pt);\ninclude/linux/mm.h-3711-\t} else {\n--\nmm/pgtable-generic.c=434=static void kernel_pgtable_work_func(struct work_struct *work)\n--\nmm/pgtable-generic.c-454-\nmm/pgtable-generic.c:455:void pagetable_free_kernel(struct ptdesc *pt)\nmm/pgtable-generic.c-456-{\n--\nmm/pgtable-generic.c-463-#else\nmm/pgtable-generic.c:464:void pagetable_free_kernel(struct ptdesc *pt)\nmm/pgtable-generic.c-465-{\n"
} |
| 5/2 | 2026/06/30 05:39 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 4601 output: 31 thoughts: 54 Thoughts: Here's my take on the thought process, as if it were my own: **Investigating `pagetable_free` and `pagetable_free_kernel`** Okay, so I see that `pagetable_free_kernel` is being called from `pagetable_free`. I know from memory that this happens under certain conditions, specifically related to KASAN. But let's verify that. I need to be absolutely sure about the exact trigger. It's time to check the source code. Let me open up `include/linux/mm.h` and take a look at the definition of `pagetable_free`. I need to refresh my memory on the exact conditional that governs the call to `pagetable_free_kernel` so I can confirm my mental model. This is critical for understanding memory management and how KASAN interacts with page table freeing. I want to make sure I don't make any assumptions based on fuzzy recall. Time to dig in and confirm the exact logic. |
| 6/2 | 2026/06/30 05:39 | tool | grepper |
0mArgs:{
"Expression": "pagetable_free",
"PathPrefix": "include/linux/mm.h"
}Results: {
"Output": "include/linux/mm.h=3683=static inline struct ptdesc *pagetable_alloc_noprof(gfp_t gfp, unsigned int order)\n--\ninclude/linux/mm.h-3690-\ninclude/linux/mm.h:3691:static inline void __pagetable_free(struct ptdesc *pt)\ninclude/linux/mm.h-3692-{\n--\ninclude/linux/mm.h-3697-\ninclude/linux/mm.h:3698:void pagetable_free_kernel(struct ptdesc *pt);\ninclude/linux/mm.h-3699-/**\ninclude/linux/mm.h:3700: * pagetable_free - Free pagetables\ninclude/linux/mm.h-3701- * @pt:\tThe page table descriptor\ninclude/linux/mm.h-3702- *\ninclude/linux/mm.h:3703: * pagetable_free frees the memory of all page tables described by a page\ninclude/linux/mm.h-3704- * table descriptor and the memory for the descriptor itself.\ninclude/linux/mm.h-3705- */\ninclude/linux/mm.h:3706:static inline void pagetable_free(struct ptdesc *pt)\ninclude/linux/mm.h-3707-{\n--\ninclude/linux/mm.h-3709-\t\tptdesc_clear_kernel(pt);\ninclude/linux/mm.h:3710:\t\tpagetable_free_kernel(pt);\ninclude/linux/mm.h-3711-\t} else {\ninclude/linux/mm.h:3712:\t\t__pagetable_free(pt);\ninclude/linux/mm.h-3713-\t}\n--\ninclude/linux/mm.h=3808=static inline void pagetable_dtor_free(struct ptdesc *ptdesc)\n--\ninclude/linux/mm.h-3810-\tpagetable_dtor(ptdesc);\ninclude/linux/mm.h:3811:\tpagetable_free(ptdesc);\ninclude/linux/mm.h-3812-}\n"
} |
| 7/2 | 2026/06/30 05:39 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 5451 output: 36 thoughts: 26 Thoughts: Okay, here's my attempt at summarizing that thought process, tailored for an expert audience: **Kernel Page Table Deallocation Analysis** Alright, so I'm digging into this kernel memory management code. I need to understand the logic flow around page table freeing. Specifically, I'm trying to figure out the conditions that trigger the call to `pagetable_free_kernel`. My hunch is that there's a preceding check – perhaps a function call, or a macro – that determines whether the page table being targeted by the process is, in fact, a kernel-specific page table. The name seems to suggest something like `ptdesc_is_kernel`, or maybe it's `pt_is_kernel`, or some variation on that theme. I need to identify *that* check. I need to find the specific conditional expression that determines when `pagetable_free_kernel` is actually invoked. I need to trace back from `pagetable_free_kernel` and see what variable or function call is being tested immediately beforehand. This is crucial for understanding the overall memory reclaim strategy and potential vulnerability. |
| 8/2 | 2026/06/30 05:39 | tool | read-file |
0mArgs:{
"File": "include/linux/mm.h",
"FirstLine": 3700,
"LineCount": 20
}Results: {
"Contents": "3700:\t * pagetable_free - Free pagetables\n3701:\t * @pt:\tThe page table descriptor\n3702:\t *\n3703:\t * pagetable_free frees the memory of all page tables described by a page\n3704:\t * table descriptor and the memory for the descriptor itself.\n3705:\t */\n3706:\tstatic inline void pagetable_free(struct ptdesc *pt)\n3707:\t{\n3708:\t\tif (ptdesc_test_kernel(pt)) {\n3709:\t\t\tptdesc_clear_kernel(pt);\n3710:\t\t\tpagetable_free_kernel(pt);\n3711:\t\t} else {\n3712:\t\t\t__pagetable_free(pt);\n3713:\t\t}\n3714:\t}\n3715:\t\n3716:\t#if defined(CONFIG_SPLIT_PTE_PTLOCKS)\n3717:\t#if ALLOC_SPLIT_PTLOCKS\n3718:\tvoid __init ptlock_cache_init(void);\n3719:\tbool ptlock_alloc(struct ptdesc *ptdesc);\n"
} |
| 9/2 | 2026/06/30 05:39 | llm | patch-evaluator |
1mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 6056 output: 23 thoughts: 156 Thoughts: **Analyzing the Kernel Page Table Freeing Mechanism** Okay, so I'm looking at this `pagetable_free` function, and it seems like there's been a functional change. If the page table descriptor, `pt`, passes the `ptdesc_test_kernel(pt)` test, it now calls `pagetable_free_kernel`. That's interesting, this defers the actual freeing of the kernel page tables and uses RCU, which makes sense for concurrency. The key functions to really dig into here are `pagetable_free_kernel`, then `kernel_pgtable_free_rcu`, which is obviously the RCU interface, `kernel_pgtable_work_func`, and finally, the rather unexpected `ptdump_walk_pgd`. Wait, `ptdump_walk_pgd`? That's part of the page table dump mechanism, which is a *debugging* feature! That's odd that it's in a path tied to core memory management. I'll have to investigate that connection more closely later. But, back to the main point, `pagetable_free_kernel` is definitely core MM. I need to understand this deferred freeing. It's crucial for the kernel's stability under heavy load or even in general. Now, I should quickly check if `ASYNC_KERNEL_PGTABLE_FREE` is a compile-time configuration option. I need to determine if this is conditionally compiled and what its implications are. That will help me understand the circumstances under which this behavior is engaged and if it can cause problems if disabled. |
| 10/2 | 2026/06/30 05:40 | tool | grepper |
0mArgs:{
"Expression": "ASYNC_KERNEL_PGTABLE_FREE"
}Results: {
"Output": "arch/x86/Kconfig=58=config X86\n--\narch/x86/Kconfig-283-\tselect HAVE_PERF_USER_STACK_DUMP\narch/x86/Kconfig:284:\tselect ASYNC_KERNEL_PGTABLE_FREE\tif IOMMU_SVA\narch/x86/Kconfig-285-\tselect MMU_GATHER_RCU_TABLE_FREE\n--\nmm/Kconfig=1020=config HAVE_GIGANTIC_FOLIOS\n--\nmm/Kconfig-1023-\nmm/Kconfig:1024:config ASYNC_KERNEL_PGTABLE_FREE\nmm/Kconfig-1025-\tdef_bool n\n--\nmm/pgtable-generic.c=413=static void kernel_pgtable_free_rcu(struct rcu_head *head)\n--\nmm/pgtable-generic.c-419-\nmm/pgtable-generic.c:420:#ifdef CONFIG_ASYNC_KERNEL_PGTABLE_FREE\nmm/pgtable-generic.c-421-static void kernel_pgtable_work_func(struct work_struct *work);\n"
} |
| 11/2 | 2026/06/30 05:40 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 6876 output: 21 thoughts: 197 Thoughts: **Analyzing the Implications of the Asynchronous Page Table Freeing Patch** Okay, so I'm looking at this patch and immediately, the interaction between `ASYNC_KERNEL_PGTABLE_FREE` and `IOMMU_SVA` on x86 jumps out. The initial logic suggests `ASYNC_KERNEL_PGTABLE_FREE` is contingent on `IOMMU_SVA` for x86. However, this patch seems to fundamentally change the game. The addition of that crucial `#else` block within `mm/pgtable-generic.c` is the key. Now, `pagetable_free_kernel` is *always* defined. And, regardless of whether `ASYNC_KERNEL_PGTABLE_FREE` is enabled or not, it *always* defers the freeing process using RCU, either directly or via a workqueue. That's a significant shift in behavior. We've moved from potential synchronous freeing to *guaranteed* asynchronous freeing for kernel page tables. But wait, there's more. The modification to `mm/pagewalk.c` and `mm/ptdump.c` is immediately concerning. I know that `ptdump_walk_pgd` is used by the `PTDUMP_DEBUGFS` functionality, which is critical for debugging and analyzing page table structures. I need to dig into this further. I've got to ensure this change doesn't introduce any subtle regressions within the debug and tracing utilities. I need to verify that this change doesn't break any assumptions those tools rely on. I'll need to check how the asynchronous freeing interacts with the page table dump code, and whether it introduces any race conditions. Let's see... |
| 12/2 | 2026/06/30 05:40 | tool | grepper |
0mArgs:{
"Expression": "ptdump_walk_pgd"
}Results: {
"Output": "arch/arm/include/asm/ptdump.h=16=struct ptdump_info {\n--\narch/arm/include/asm/ptdump.h-21-\narch/arm/include/asm/ptdump.h:22:void ptdump_walk_pgd(struct seq_file *s, struct ptdump_info *info);\narch/arm/include/asm/ptdump.h-23-#ifdef CONFIG_ARM_PTDUMP_DEBUGFS\n--\narch/arm/mm/dump.c=398=static void walk_pgd(struct pg_state *st, struct mm_struct *mm,\n--\narch/arm/mm/dump.c-414-\narch/arm/mm/dump.c:415:void ptdump_walk_pgd(struct seq_file *m, struct ptdump_info *info)\narch/arm/mm/dump.c-416-{\n--\narch/arm/mm/ptdump_debugfs.c=7=static int ptdump_show(struct seq_file *m, void *v)\n--\narch/arm/mm/ptdump_debugfs.c-10-\narch/arm/mm/ptdump_debugfs.c:11:\tptdump_walk_pgd(m, info);\narch/arm/mm/ptdump_debugfs.c-12-\treturn 0;\n--\narch/arm64/mm/ptdump.c=279=void note_page_flush(struct ptdump_state *pt_st)\n--\narch/arm64/mm/ptdump.c-285-\narch/arm64/mm/ptdump.c:286:static void arm64_ptdump_walk_pgd(struct ptdump_state *st, struct mm_struct *mm)\narch/arm64/mm/ptdump.c-287-{\narch/arm64/mm/ptdump.c-288-\tstatic_branch_inc(\u0026arm64_ptdump_lock_key);\narch/arm64/mm/ptdump.c:289:\tptdump_walk_pgd(st, mm, NULL);\narch/arm64/mm/ptdump.c-290-\tstatic_branch_dec(\u0026arm64_ptdump_lock_key);\n--\narch/arm64/mm/ptdump.c=293=void ptdump_walk(struct seq_file *s, struct ptdump_info *info)\n--\narch/arm64/mm/ptdump.c-320-\narch/arm64/mm/ptdump.c:321:\tarm64_ptdump_walk_pgd(\u0026st.ptdump, info-\u003emm);\narch/arm64/mm/ptdump.c-322-}\n--\narch/arm64/mm/ptdump.c=338=bool ptdump_check_wx(void)\n--\narch/arm64/mm/ptdump.c-362-\narch/arm64/mm/ptdump.c:363:\tarm64_ptdump_walk_pgd(\u0026st.ptdump, \u0026init_mm);\narch/arm64/mm/ptdump.c-364-\n--\narch/powerpc/mm/ptdump/ptdump.c=334=static int ptdump_show(struct seq_file *m, void *v)\n--\narch/powerpc/mm/ptdump/ptdump.c-351-\t/* Traverse kernel page tables */\narch/powerpc/mm/ptdump/ptdump.c:352:\tptdump_walk_pgd(\u0026st.ptdump, \u0026init_mm, NULL);\narch/powerpc/mm/ptdump/ptdump.c-353-\treturn 0;\n--\narch/powerpc/mm/ptdump/ptdump.c=368=bool ptdump_check_wx(void)\n--\narch/powerpc/mm/ptdump/ptdump.c-391-\narch/powerpc/mm/ptdump/ptdump.c:392:\tptdump_walk_pgd(\u0026st.ptdump, \u0026init_mm, NULL);\narch/powerpc/mm/ptdump/ptdump.c-393-\n--\narch/riscv/mm/ptdump.c=353=static void ptdump_walk(struct seq_file *s, struct ptd_mm_info *pinfo)\n--\narch/riscv/mm/ptdump.c-372-\narch/riscv/mm/ptdump.c:373:\tptdump_walk_pgd(\u0026st.ptdump, pinfo-\u003emm, NULL);\narch/riscv/mm/ptdump.c-374-}\n--\narch/riscv/mm/ptdump.c=376=bool ptdump_check_wx(void)\n--\narch/riscv/mm/ptdump.c-399-\narch/riscv/mm/ptdump.c:400:\tptdump_walk_pgd(\u0026st.ptdump, \u0026init_mm, NULL);\narch/riscv/mm/ptdump.c-401-\n--\narch/s390/mm/dump_pagetables.c=182=bool ptdump_check_wx(void)\n--\narch/s390/mm/dump_pagetables.c-210-\t\treturn true;\narch/s390/mm/dump_pagetables.c:211:\tptdump_walk_pgd(\u0026st.ptdump, \u0026init_mm, NULL);\narch/s390/mm/dump_pagetables.c-212-\tif (st.wx_pages) {\n--\narch/s390/mm/dump_pagetables.c=226=static int ptdump_show(struct seq_file *m, void *v)\n--\narch/s390/mm/dump_pagetables.c-250-\tmutex_lock(\u0026cpa_mutex);\narch/s390/mm/dump_pagetables.c:251:\tptdump_walk_pgd(\u0026st.ptdump, \u0026init_mm, NULL);\narch/s390/mm/dump_pagetables.c-252-\tmutex_unlock(\u0026cpa_mutex);\n--\narch/x86/include/asm/pgtable.h=30=struct seq_file;\narch/x86/include/asm/pgtable.h:31:void ptdump_walk_pgd_level(struct seq_file *m, struct mm_struct *mm);\narch/x86/include/asm/pgtable.h:32:void ptdump_walk_pgd_level_debugfs(struct seq_file *m, struct mm_struct *mm,\narch/x86/include/asm/pgtable.h-33-\t\t\t\t bool user);\narch/x86/include/asm/pgtable.h:34:bool ptdump_walk_pgd_level_checkwx(void);\narch/x86/include/asm/pgtable.h:35:#define ptdump_check_wx ptdump_walk_pgd_level_checkwx\narch/x86/include/asm/pgtable.h-36-void ptdump_walk_user_pgd_level_checkwx(void);\n--\narch/x86/mm/debug_pagetables.c=8=static int ptdump_show(struct seq_file *m, void *v)\narch/x86/mm/debug_pagetables.c-9-{\narch/x86/mm/debug_pagetables.c:10:\tptdump_walk_pgd_level_debugfs(m, \u0026init_mm, false);\narch/x86/mm/debug_pagetables.c-11-\treturn 0;\n--\narch/x86/mm/debug_pagetables.c=16=static int ptdump_curknl_show(struct seq_file *m, void *v)\n--\narch/x86/mm/debug_pagetables.c-18-\tif (current-\u003emm-\u003epgd)\narch/x86/mm/debug_pagetables.c:19:\t\tptdump_walk_pgd_level_debugfs(m, current-\u003emm, false);\narch/x86/mm/debug_pagetables.c-20-\treturn 0;\n--\narch/x86/mm/debug_pagetables.c=26=static int ptdump_curusr_show(struct seq_file *m, void *v)\n--\narch/x86/mm/debug_pagetables.c-28-\tif (current-\u003emm-\u003epgd)\narch/x86/mm/debug_pagetables.c:29:\t\tptdump_walk_pgd_level_debugfs(m, current-\u003emm, true);\narch/x86/mm/debug_pagetables.c-30-\treturn 0;\n--\narch/x86/mm/debug_pagetables.c=37=static int ptdump_efi_show(struct seq_file *m, void *v)\n--\narch/x86/mm/debug_pagetables.c-39-\tif (efi_mm.pgd)\narch/x86/mm/debug_pagetables.c:40:\t\tptdump_walk_pgd_level_debugfs(m, \u0026efi_mm, false);\narch/x86/mm/debug_pagetables.c-41-\treturn 0;\n--\narch/x86/mm/dump_pagetables.c=416=static void note_page_flush(struct ptdump_state *pt_st)\n--\narch/x86/mm/dump_pagetables.c-422-\narch/x86/mm/dump_pagetables.c:423:bool ptdump_walk_pgd_level_core(struct seq_file *m,\narch/x86/mm/dump_pagetables.c-424-\t\t\t\tstruct mm_struct *mm, pgd_t *pgd,\n--\narch/x86/mm/dump_pagetables.c-457-\narch/x86/mm/dump_pagetables.c:458:\tptdump_walk_pgd(\u0026st.ptdump, mm, pgd);\narch/x86/mm/dump_pagetables.c-459-\n--\narch/x86/mm/dump_pagetables.c-473-\narch/x86/mm/dump_pagetables.c:474:void ptdump_walk_pgd_level(struct seq_file *m, struct mm_struct *mm)\narch/x86/mm/dump_pagetables.c-475-{\narch/x86/mm/dump_pagetables.c:476:\tptdump_walk_pgd_level_core(m, mm, mm-\u003epgd, false, true);\narch/x86/mm/dump_pagetables.c-477-}\narch/x86/mm/dump_pagetables.c-478-\narch/x86/mm/dump_pagetables.c:479:void ptdump_walk_pgd_level_debugfs(struct seq_file *m, struct mm_struct *mm,\narch/x86/mm/dump_pagetables.c-480-\t\t\t\t bool user)\n--\narch/x86/mm/dump_pagetables.c-486-#endif\narch/x86/mm/dump_pagetables.c:487:\tptdump_walk_pgd_level_core(m, mm, pgd, false, false);\narch/x86/mm/dump_pagetables.c-488-}\n--\narch/x86/mm/dump_pagetables.c=490=void ptdump_walk_user_pgd_level_checkwx(void)\n--\narch/x86/mm/dump_pagetables.c-500-\tpgd = kernel_to_user_pgdp(pgd);\narch/x86/mm/dump_pagetables.c:501:\tptdump_walk_pgd_level_core(NULL, \u0026init_mm, pgd, true, false);\narch/x86/mm/dump_pagetables.c-502-#endif\n--\narch/x86/mm/dump_pagetables.c-504-\narch/x86/mm/dump_pagetables.c:505:bool ptdump_walk_pgd_level_checkwx(void)\narch/x86/mm/dump_pagetables.c-506-{\n--\narch/x86/mm/dump_pagetables.c-509-\narch/x86/mm/dump_pagetables.c:510:\treturn ptdump_walk_pgd_level_core(NULL, \u0026init_mm, INIT_PGD, true, false);\narch/x86/mm/dump_pagetables.c-511-}\n--\narch/x86/platform/efi/efi_32.c=75=void __init efi_dump_pagetable(void)\n--\narch/x86/platform/efi/efi_32.c-77-#ifdef CONFIG_EFI_PGT_DUMP\narch/x86/platform/efi/efi_32.c:78:\tptdump_walk_pgd_level(NULL, \u0026init_mm);\narch/x86/platform/efi/efi_32.c-79-#endif\n--\narch/x86/platform/efi/efi_64.c=423=void __init efi_dump_pagetable(void)\n--\narch/x86/platform/efi/efi_64.c-425-#ifdef CONFIG_EFI_PGT_DUMP\narch/x86/platform/efi/efi_64.c:426:\tptdump_walk_pgd_level(NULL, \u0026efi_mm);\narch/x86/platform/efi/efi_64.c-427-#endif\n--\ninclude/linux/ptdump.h=13=struct ptdump_state {\n--\ninclude/linux/ptdump.h-27-\ninclude/linux/ptdump.h:28:bool ptdump_walk_pgd_level_core(struct seq_file *m,\ninclude/linux/ptdump.h-29-\t\t\t\tstruct mm_struct *mm, pgd_t *pgd,\ninclude/linux/ptdump.h-30-\t\t\t\tbool checkwx, bool dmesg);\ninclude/linux/ptdump.h:31:void ptdump_walk_pgd(struct ptdump_state *st, struct mm_struct *mm, pgd_t *pgd);\ninclude/linux/ptdump.h-32-bool ptdump_check_wx(void);\n--\nmm/ptdump.c=166=static const struct mm_walk_ops ptdump_ops = {\n--\nmm/ptdump.c-174-\nmm/ptdump.c:175:void ptdump_walk_pgd(struct ptdump_state *st, struct mm_struct *mm, pgd_t *pgd)\nmm/ptdump.c-176-{\n"
} |
| 13/2 | 2026/06/30 05:40 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 11303 output: 20 thoughts: 91 Thoughts: **Analyzing Reachability in Memory Management** Okay, so `ptdump_walk_pgd` is called by `ptdump_check_wx`, and *that* function gets invoked during boot. So, no question, it's definitely reachable code. We know we're going to get to it. Makes sense. And then, if I'm understanding this right, `pagetable_free_kernel` gets called *anytime* kernel page tables are freed. Right, right, things like when we're releasing `vmalloc` memory or freeing huge pages mapped with `vmap`. Got it. That's a pretty wide net. Hmm... just to be absolutely sure, I'm going to re-examine the callers of `pagetable_free_kernel`. Just to make sure my understanding of its reach is still correct. It pays to be thorough with this stuff. |
| 14/2 | 2026/06/30 05:40 | tool | grepper |
0mArgs:{
"Expression": "pagetable_free_kernel"
}Results: {
"Output": "include/linux/mm.h=3691=static inline void __pagetable_free(struct ptdesc *pt)\n--\ninclude/linux/mm.h-3697-\ninclude/linux/mm.h:3698:void pagetable_free_kernel(struct ptdesc *pt);\ninclude/linux/mm.h-3699-/**\n--\ninclude/linux/mm.h=3706=static inline void pagetable_free(struct ptdesc *pt)\n--\ninclude/linux/mm.h-3709-\t\tptdesc_clear_kernel(pt);\ninclude/linux/mm.h:3710:\t\tpagetable_free_kernel(pt);\ninclude/linux/mm.h-3711-\t} else {\n--\nmm/pgtable-generic.c=434=static void kernel_pgtable_work_func(struct work_struct *work)\n--\nmm/pgtable-generic.c-454-\nmm/pgtable-generic.c:455:void pagetable_free_kernel(struct ptdesc *pt)\nmm/pgtable-generic.c-456-{\n--\nmm/pgtable-generic.c-463-#else\nmm/pgtable-generic.c:464:void pagetable_free_kernel(struct ptdesc *pt)\nmm/pgtable-generic.c-465-{\n"
} |
| 15/2 | 2026/06/30 05:40 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 11956 output: 29 thoughts: 51 Thoughts: Here's my thought process, as if I were considering this code: **Analyzing the `pagetable_free` Function** Okay, so `pagetable_free` is the function that's responsible for, well, freeing page tables. I know it's called from various other freeing functions: `pagetable_dtor_free`, and then, depending on the level of the page table, `pud_free`, `pmd_free`, and `pte_free_kernel`, and probably others I'm not immediately recalling. Seems like the common denominator. Right, so let's start by digging into `pagetable_free` itself. I need to understand its exact function and how it interfaces with the lower level freeing routines, considering its called from all the various levels of page table management. Let me take a look at the implementation... |
| 16/2 | 2026/06/30 05:40 | tool | grepper |
0mArgs:{
"Expression": "pagetable_free",
"PathPrefix": "arch/x86"
}Results: {
"Output": "arch/x86/mm/init_64.c=1009=static void __meminit free_pagetable(struct page *page, int order)\n--\narch/x86/mm/init_64.c-1026-\t} else {\narch/x86/mm/init_64.c:1027:\t\tpagetable_free(page_ptdesc(page));\narch/x86/mm/init_64.c-1028-\t}\n--\narch/x86/mm/pat/set_memory.c=413=static void cpa_collapse_large_pages(struct cpa_data *cpa)\n--\narch/x86/mm/pat/set_memory.c-440-\t\tlist_del(\u0026ptdesc-\u003ept_list);\narch/x86/mm/pat/set_memory.c:441:\t\tpagetable_free(ptdesc);\narch/x86/mm/pat/set_memory.c-442-\t}\n--\narch/x86/mm/pat/set_memory.c=1233=static int split_large_page(struct cpa_data *cpa, pte_t *kpte,\n--\narch/x86/mm/pat/set_memory.c-1246-\tif (__split_large_page(cpa, kpte, address, ptdesc))\narch/x86/mm/pat/set_memory.c:1247:\t\tpagetable_free(ptdesc);\narch/x86/mm/pat/set_memory.c-1248-\n--\narch/x86/mm/pgtable.c=150=static void free_pmds(struct mm_struct *mm, pmd_t *pmds[], int count)\n--\narch/x86/mm/pgtable.c-159-\t\t\tpagetable_dtor(ptdesc);\narch/x86/mm/pgtable.c:160:\t\t\tpagetable_free(ptdesc);\narch/x86/mm/pgtable.c-161-\t\t\tmm_dec_nr_pmds(mm);\n--\narch/x86/mm/pgtable.c=165=static int preallocate_pmds(struct mm_struct *mm, pmd_t *pmds[], int count)\n--\narch/x86/mm/pgtable.c-181-\t\tif (ptdesc \u0026\u0026 !pagetable_pmd_ctor(mm, ptdesc)) {\narch/x86/mm/pgtable.c:182:\t\t\tpagetable_free(ptdesc);\narch/x86/mm/pgtable.c-183-\t\t\tptdesc = NULL;\n"
} |
| 17/2 | 2026/06/30 05:40 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 12901 output: 21 thoughts: 184 Thoughts: **Analyzing Kernel Page Table Freeing** Okay, so it's confirmed: `pagetable_free` *is* definitely in use. This patch is making some fundamental changes to how kernel page tables are freed, opting for deferred freeing using RCU. The primary motivation here, as I understand it, is to mitigate potential use-after-free scenarios, specifically when locklessly traversing kernel page tables, something that's crucial during processes like `ptdump`. This is definitely a functional change and therefore worthy of thorough fuzzing. My primary areas of focus are going to be `pagetable_free_kernel`, `kernel_pgtable_free_rcu`, which are the obvious candidates, alongside `ptdump_walk_pgd`, `walk_kernel_page_table_range`, and `walk_kernel_page_table_range_lockless` – those functions represent the areas this patch is intended to protect. Wait a second, this is interesting. The patch also seems to be modifying `walk_page_range_debug` to now call `walk_kernel_page_table_range`. I need to understand that relationship better. I'll need to drill down into `walk_page_range_debug` to fully assess the implications of that call chain. |
| 18/2 | 2026/06/30 05:40 | tool | grepper |
0mArgs:{
"Expression": "walk_page_range_debug"
}Results: {
"Output": "Documentation/mm/process_addrs.rst=382=We also permit a truly unusual case is the traversal of non-VMA ranges in\nDocumentation/mm/process_addrs.rst:383:**userland** ranges, as provided for by :c:func:`!walk_page_range_debug`.\nDocumentation/mm/process_addrs.rst-384-\n--\nmm/internal.h=1840=int walk_page_range_vma_unsafe(struct vm_area_struct *vma, unsigned long start,\n--\nmm/internal.h-1842-\t\tvoid *private);\nmm/internal.h:1843:int walk_page_range_debug(struct mm_struct *mm, unsigned long start,\nmm/internal.h-1844-\t\t\t unsigned long end, const struct mm_walk_ops *ops,\n--\nmm/pagewalk.c=648=int walk_kernel_page_table_range_lockless(unsigned long start, unsigned long end,\n--\nmm/pagewalk.c-667-/**\nmm/pagewalk.c:668: * walk_page_range_debug - walk a range of pagetables not backed by a vma\nmm/pagewalk.c-669- * @mm:\t\tmm_struct representing the target process of page table walk\n--\nmm/pagewalk.c-681- */\nmm/pagewalk.c:682:int walk_page_range_debug(struct mm_struct *mm, unsigned long start,\nmm/pagewalk.c-683-\t\t\t unsigned long end, const struct mm_walk_ops *ops,\n--\nmm/ptdump.c=175=void ptdump_walk_pgd(struct ptdump_state *st, struct mm_struct *mm, pgd_t *pgd)\n--\nmm/ptdump.c-182-\twhile (range-\u003estart != range-\u003eend) {\nmm/ptdump.c:183:\t\twalk_page_range_debug(mm, range-\u003estart, range-\u003eend,\nmm/ptdump.c-184-\t\t\t\t \u0026ptdump_ops, pgd, st);\n"
} |
| 19/2 | 2026/06/30 05:41 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 13911 output: 19 thoughts: 62 Thoughts: Here's my summary, as the expert: **Tracing the Dependency Chain in the Page Table Dump Code** Alright, let's break this down. It looks like `walk_page_range_debug` has a very specific purpose—it's being utilized directly by `ptdump_walk_pgd`. Then, `ptdump_walk_pgd` itself has two primary consumers: `PTDUMP_DEBUGFS` and `PTDUMP_CORE`. Given the options, I want to investigate the `PTDUMP_DEBUGFS` usage. It seems to have the higher level of dependency so this is where I will start my work. |
| 20/2 | 2026/06/30 05:41 | tool | grepper |
0mArgs:{
"Expression": "PTDUMP_DEBUGFS"
}Results: {
"Output": "Documentation/arch/arm64/ptdump.rst=23=configurations and mount debugfs::\nDocumentation/arch/arm64/ptdump.rst-24-\nDocumentation/arch/arm64/ptdump.rst:25: CONFIG_PTDUMP_DEBUGFS=y\nDocumentation/arch/arm64/ptdump.rst-26-\n--\narch/arm/Kconfig.debug=3=config ARM_PTDUMP_CORE\n--\narch/arm/Kconfig.debug-5-\narch/arm/Kconfig.debug:6:config ARM_PTDUMP_DEBUGFS\narch/arm/Kconfig.debug-7-\tbool \"Export kernel pagetable layout to userspace via debugfs\"\n--\narch/arm/include/asm/ptdump.h=22=void ptdump_walk_pgd(struct seq_file *s, struct ptdump_info *info);\narch/arm/include/asm/ptdump.h:23:#ifdef CONFIG_ARM_PTDUMP_DEBUGFS\narch/arm/include/asm/ptdump.h-24-#define EFI_RUNTIME_MAP_END\tSZ_1G\n--\narch/arm/include/asm/ptdump.h=27=static inline void ptdump_debugfs_register(struct ptdump_info *info,\narch/arm/include/asm/ptdump.h-28-\t\t\t\t\t const char *name) { }\narch/arm/include/asm/ptdump.h:29:#endif /* CONFIG_ARM_PTDUMP_DEBUGFS */\narch/arm/include/asm/ptdump.h-30-\n--\narch/arm/mm/Makefile=17=obj-$(CONFIG_ARM_PTDUMP_CORE)\t+= dump.o\narch/arm/mm/Makefile:18:obj-$(CONFIG_ARM_PTDUMP_DEBUGFS)\t+= ptdump_debugfs.o\narch/arm/mm/Makefile-19-obj-$(CONFIG_MODULES)\t\t+= proc-syms.o\n--\narch/arm64/include/asm/ptdump.h=70=void note_page_flush(struct ptdump_state *st);\narch/arm64/include/asm/ptdump.h:71:#ifdef CONFIG_PTDUMP_DEBUGFS\narch/arm64/include/asm/ptdump.h-72-#define EFI_RUNTIME_MAP_END\tDEFAULT_MAP_WINDOW_64\n--\narch/arm64/include/asm/ptdump.h=75=static inline void ptdump_debugfs_register(struct ptdump_info *info,\narch/arm64/include/asm/ptdump.h-76-\t\t\t\t\t const char *name) { }\narch/arm64/include/asm/ptdump.h:77:#endif /* CONFIG_PTDUMP_DEBUGFS */\narch/arm64/include/asm/ptdump.h-78-#else\n--\narch/arm64/mm/Makefile=8=obj-$(CONFIG_PTDUMP)\t\t+= ptdump.o\narch/arm64/mm/Makefile:9:obj-$(CONFIG_PTDUMP_DEBUGFS)\t+= ptdump_debugfs.o\narch/arm64/mm/Makefile-10-obj-$(CONFIG_TRANS_TABLE)\t+= trans_pgd.o\n--\narch/powerpc/configs/mpc885_ads_defconfig=79=CONFIG_PPC_EARLY_DEBUG=y\narch/powerpc/configs/mpc885_ads_defconfig:80:CONFIG_PTDUMP_DEBUGFS=y\n--\narch/powerpc/mm/ptdump/Makefile=9=obj-$(CONFIG_PPC_BOOK3S_64)\t+= book3s64.o\narch/powerpc/mm/ptdump/Makefile-10-\narch/powerpc/mm/ptdump/Makefile:11:ifdef CONFIG_PTDUMP_DEBUGFS\narch/powerpc/mm/ptdump/Makefile-12-obj-$(CONFIG_PPC_BOOK3S_32)\t+= bats.o segment_regs.o\n--\narch/powerpc/mm/ptdump/ptdump.c=406=static int __init ptdump_init(void)\n--\narch/powerpc/mm/ptdump/ptdump.c-419-\narch/powerpc/mm/ptdump/ptdump.c:420:\tif (IS_ENABLED(CONFIG_PTDUMP_DEBUGFS))\narch/powerpc/mm/ptdump/ptdump.c-421-\t\tdebugfs_create_file(\"kernel_page_tables\", 0400, NULL, NULL, \u0026ptdump_fops);\n--\narch/s390/configs/debug_defconfig=842=CONFIG_DEBUG_WX=y\narch/s390/configs/debug_defconfig:843:CONFIG_PTDUMP_DEBUGFS=y\narch/s390/configs/debug_defconfig-844-CONFIG_DEBUG_OBJECTS=y\n--\narch/s390/configs/defconfig=821=CONFIG_DEBUG_WX=y\narch/s390/configs/defconfig:822:CONFIG_PTDUMP_DEBUGFS=y\narch/s390/configs/defconfig-823-CONFIG_DEBUG_MEMORY_INIT=y\n--\narch/s390/mm/dump_pagetables.c=182=bool ptdump_check_wx(void)\n--\narch/s390/mm/dump_pagetables.c-224-\narch/s390/mm/dump_pagetables.c:225:#ifdef CONFIG_PTDUMP_DEBUGFS\narch/s390/mm/dump_pagetables.c-226-static int ptdump_show(struct seq_file *m, void *v)\n--\narch/s390/mm/dump_pagetables.c=255=DEFINE_SHOW_ATTRIBUTE(ptdump);\narch/s390/mm/dump_pagetables.c:256:#endif /* CONFIG_PTDUMP_DEBUGFS */\narch/s390/mm/dump_pagetables.c-257-\n--\narch/s390/mm/dump_pagetables.c=315=static int pt_dump_init(void)\n--\narch/s390/mm/dump_pagetables.c-355-\tsort(\u0026markers[1], markers_cnt - 1, sizeof(*markers), ptdump_cmp, NULL);\narch/s390/mm/dump_pagetables.c:356:#ifdef CONFIG_PTDUMP_DEBUGFS\narch/s390/mm/dump_pagetables.c-357-\tdebugfs_create_file(\"kernel_page_tables\", 0400, NULL, NULL, \u0026ptdump_fops);\narch/s390/mm/dump_pagetables.c:358:#endif /* CONFIG_PTDUMP_DEBUGFS */\narch/s390/mm/dump_pagetables.c-359-\treturn 0;\n--\narch/x86/mm/Makefile=37=obj-$(CONFIG_PTDUMP)\t\t+= dump_pagetables.o\narch/x86/mm/Makefile:38:obj-$(CONFIG_PTDUMP_DEBUGFS)\t+= debug_pagetables.o\narch/x86/mm/Makefile-39-\n--\ndrivers/firmware/efi/arm-runtime.c-27-\ndrivers/firmware/efi/arm-runtime.c:28:#if defined(CONFIG_PTDUMP_DEBUGFS) || defined(CONFIG_ARM_PTDUMP_DEBUGFS)\ndrivers/firmware/efi/arm-runtime.c-29-#include \u003casm/ptdump.h\u003e\n--\nkernel/configs/debug.config=78=CONFIG_KASAN_VMALLOC=y\nkernel/configs/debug.config:79:CONFIG_PTDUMP_DEBUGFS=y\nkernel/configs/debug.config-80-CONFIG_SCHED_STACK_END_CHECK=y\n--\nmm/Kconfig.debug=219=config PTDUMP\n--\nmm/Kconfig.debug-221-\nmm/Kconfig.debug:222:config PTDUMP_DEBUGFS\nmm/Kconfig.debug-223-\tbool \"Export kernel pagetable layout to userspace via debugfs\"\n--\ntools/testing/selftests/bpf/config.aarch64=114=CONFIG_PROVE_LOCKING=y\ntools/testing/selftests/bpf/config.aarch64:115:CONFIG_PTDUMP_DEBUGFS=y\ntools/testing/selftests/bpf/config.aarch64-116-CONFIG_RC_DEVICES=y\n--\ntools/testing/selftests/bpf/config.s390x=95=CONFIG_PROVE_LOCKING=y\ntools/testing/selftests/bpf/config.s390x:96:CONFIG_PTDUMP_DEBUGFS=y\ntools/testing/selftests/bpf/config.s390x-97-CONFIG_RC_DEVICES=y\n"
} |
| 21/2 | 2026/06/30 05:41 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 16373 output: 17 thoughts: 44 Thoughts: Okay, here's my take on those thoughts, framed as my own mental processing: **Analyzing Debugging Configuration Options** Alright, so I'm looking at `PTDUMP_DEBUGFS`. That's a pretty generic config option, I see it popping up in various places. Then there's `DEBUG_WX`, and that one specifically seems to leverage `ptdump_check_wx`. This feels like the right track to understand how these features interconnect. Okay, let's zoom in on `DEBUG_WX` and see what that's all about. |
| 22/2 | 2026/06/30 05:41 | tool | grepper |
0mArgs:{
"Expression": "DEBUG_WX"
}Results: {
"Output": "\nFull output is too long, showing 500 out of 665 lines.\nUse more precise expression if possible.\n\narch/arm/Kconfig.debug=6=config ARM_PTDUMP_DEBUGFS\n--\narch/arm/Kconfig.debug-19-\narch/arm/Kconfig.debug:20:config ARM_DEBUG_WX\narch/arm/Kconfig.debug-21-\tbool \"Warn on W+X mappings at boot\"\n--\narch/arm/configs/aspeed_g4_defconfig=253=CONFIG_DEBUG_FS=y\narch/arm/configs/aspeed_g4_defconfig:254:CONFIG_ARM_DEBUG_WX=y\narch/arm/configs/aspeed_g4_defconfig-255-CONFIG_SCHED_STACK_END_CHECK=y\n--\narch/arm/configs/aspeed_g5_defconfig=303=CONFIG_DEBUG_FS=y\narch/arm/configs/aspeed_g5_defconfig:304:CONFIG_ARM_DEBUG_WX=y\narch/arm/configs/aspeed_g5_defconfig-305-CONFIG_SCHED_STACK_END_CHECK=y\n--\narch/arm/configs/shmobile_defconfig=227=CONFIG_DEBUG_FS=y\narch/arm/configs/shmobile_defconfig:228:CONFIG_ARM_DEBUG_WX=y\n--\narch/arm/include/asm/ptdump.h=31=void ptdump_check_wx(void);\n--\narch/arm/include/asm/ptdump.h-34-\narch/arm/include/asm/ptdump.h:35:#ifdef CONFIG_ARM_DEBUG_WX\narch/arm/include/asm/ptdump.h-36-#define arm_debug_checkwx() ptdump_check_wx()\n--\narch/arm64/Kconfig=2=config ARM64\n--\narch/arm64/Kconfig-13-\tselect ACPI_PPTT if ACPI\narch/arm64/Kconfig:14:\tselect ARCH_HAS_DEBUG_WX\narch/arm64/Kconfig-15-\tselect ARCH_BINFMT_ELF_EXTRA_PHDRS\n--\narch/powerpc/Kconfig=118=config PPC\n--\narch/powerpc/Kconfig-132-\tselect ARCH_HAS_DEBUG_VM_PGTABLE\narch/powerpc/Kconfig:133:\tselect ARCH_HAS_DEBUG_WX\t\tif STRICT_KERNEL_RWX\narch/powerpc/Kconfig-134-\tselect ARCH_HAS_DEVMEM_IS_ALLOWED\n--\narch/powerpc/configs/ppc64_defconfig=396=CONFIG_DEBUG_RODATA_TEST=y\narch/powerpc/configs/ppc64_defconfig:397:CONFIG_DEBUG_WX=y\narch/powerpc/configs/ppc64_defconfig-398-CONFIG_DEBUG_STACK_USAGE=y\n--\narch/powerpc/mm/ptdump/ptdump.c=184=static void note_prot_wx(struct pg_state *st, unsigned long addr)\n--\narch/powerpc/mm/ptdump/ptdump.c-193-\narch/powerpc/mm/ptdump/ptdump.c:194:\tWARN_ONCE(IS_ENABLED(CONFIG_DEBUG_WX),\narch/powerpc/mm/ptdump/ptdump.c-195-\t\t \"powerpc/mm: Found insecure W+X mapping at address %p/%pS\\n\",\n--\narch/riscv/Kconfig=13=config RISCV\n--\narch/riscv/Kconfig-30-\tselect ARCH_HAS_DEBUG_VM_PGTABLE\narch/riscv/Kconfig:31:\tselect ARCH_HAS_DEBUG_WX\narch/riscv/Kconfig-32-\tselect ARCH_HAS_ELF_CORE_EFLAGS if BINFMT_ELF \u0026\u0026 ELF_CORE\n--\narch/s390/Kconfig=75=config S390\n--\narch/s390/Kconfig-90-\tselect ARCH_HAS_DEBUG_VM_PGTABLE\narch/s390/Kconfig:91:\tselect ARCH_HAS_DEBUG_WX\narch/s390/Kconfig-92-\tselect ARCH_HAS_DEVMEM_IS_ALLOWED\n--\narch/s390/configs/debug_defconfig=841=CONFIG_DEBUG_RODATA_TEST=y\narch/s390/configs/debug_defconfig:842:CONFIG_DEBUG_WX=y\narch/s390/configs/debug_defconfig-843-CONFIG_PTDUMP_DEBUGFS=y\n--\narch/s390/configs/defconfig=820=CONFIG_MAGIC_SYSRQ=y\narch/s390/configs/defconfig:821:CONFIG_DEBUG_WX=y\narch/s390/configs/defconfig-822-CONFIG_PTDUMP_DEBUGFS=y\n--\narch/s390/mm/dump_pagetables.c=71=static void note_prot_wx(struct pg_state *st, unsigned long addr)\n--\narch/s390/mm/dump_pagetables.c-88-\t\treturn;\narch/s390/mm/dump_pagetables.c:89:\tWARN_ONCE(IS_ENABLED(CONFIG_DEBUG_WX),\narch/s390/mm/dump_pagetables.c-90-\t\t \"s390/mm: Found insecure W+X mapping at address %pS\\n\",\n--\narch/x86/Kconfig=58=config X86\n--\narch/x86/Kconfig-111-\tselect ARCH_HAS_UBSAN\narch/x86/Kconfig:112:\tselect ARCH_HAS_DEBUG_WX\narch/x86/Kconfig-113-\tselect ARCH_HAS_ZONE_DMA_SET if EXPERT\n--\narch/x86/configs/x86_64_defconfig=265=CONFIG_MAGIC_SYSRQ=y\narch/x86/configs/x86_64_defconfig:266:CONFIG_DEBUG_WX=y\narch/x86/configs/x86_64_defconfig-267-CONFIG_DEBUG_STACK_USAGE=y\n--\narch/x86/include/asm/pgtable.h=36=void ptdump_walk_user_pgd_level_checkwx(void);\n--\narch/x86/include/asm/pgtable.h-43-\narch/x86/include/asm/pgtable.h:44:#ifdef CONFIG_DEBUG_WX\narch/x86/include/asm/pgtable.h-45-#define debug_checkwx_user()\tptdump_walk_user_pgd_level_checkwx()\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=6555=static int ipw2100_wx_get_name(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6568-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:6569:\tIPW_DEBUG_WX(\"Name: %s\\n\", wrqu-\u003ename);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6570-\treturn 0;\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=6573=static int ipw2100_wx_set_freq(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6609-\t} else {\t\t/* Set the channel */\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:6610:\t\tIPW_DEBUG_WX(\"SET Freq/Channel -\u003e %d\\n\", fwrq-\u003em);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6611-\t\terr = ipw2100_set_channel(priv, fwrq-\u003em, 0);\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=6619=static int ipw2100_wx_get_freq(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6638-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:6639:\tIPW_DEBUG_WX(\"GET Freq/Channel -\u003e %d\\n\", priv-\u003echannel);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6640-\treturn 0;\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=6644=static int ipw2100_wx_set_mode(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6650-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:6651:\tIPW_DEBUG_WX(\"SET Mode -\u003e %d\\n\", wrqu-\u003emode);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6652-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=6683=static int ipw2100_wx_get_mode(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6693-\twrqu-\u003emode = priv-\u003eieee-\u003eiw_mode;\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:6694:\tIPW_DEBUG_WX(\"GET Mode -\u003e %d\\n\", wrqu-\u003emode);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6695-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=6718=static int ipw2100_wx_get_range(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6837-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:6838:\tIPW_DEBUG_WX(\"GET Range\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6839-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=6843=static int ipw2100_wx_set_wap(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6862-\t\t/* we disable mandatory BSSID association */\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:6863:\t\tIPW_DEBUG_WX(\"exit - disable mandatory BSSID\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6864-\t\tpriv-\u003econfig \u0026= ~CFG_STATIC_BSSID;\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6873-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:6874:\tIPW_DEBUG_WX(\"SET BSSID -\u003e %pM\\n\", wrqu-\u003eap_addr.sa_data);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6875-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=6881=static int ipw2100_wx_get_wap(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6898-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:6899:\tIPW_DEBUG_WX(\"Getting WAP BSSID: %pM\\n\", wrqu-\u003eap_addr.sa_data);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6900-\treturn 0;\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=6903=static int ipw2100_wx_set_essid(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6923-\tif (length == 0) {\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:6924:\t\tIPW_DEBUG_WX(\"Setting ESSID to ANY\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6925-\t\tpriv-\u003econfig \u0026= ~CFG_STATIC_ESSID;\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6934-\tif (priv-\u003eessid_len == length \u0026\u0026 !memcmp(priv-\u003eessid, extra, length)) {\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:6935:\t\tIPW_DEBUG_WX(\"ESSID set to current ESSID.\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6936-\t\terr = 0;\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6939-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:6940:\tIPW_DEBUG_WX(\"Setting ESSID: '%*pE' (%d)\\n\", length, essid, length);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6941-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=6952=static int ipw2100_wx_get_essid(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6964-\tif (priv-\u003econfig \u0026 CFG_STATIC_ESSID || priv-\u003estatus \u0026 STATUS_ASSOCIATED) {\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:6965:\t\tIPW_DEBUG_WX(\"Getting essid: '%*pE'\\n\",\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6966-\t\t\t priv-\u003eessid_len, priv-\u003eessid);\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6970-\t} else {\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:6971:\t\tIPW_DEBUG_WX(\"Getting essid: ANY\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6972-\t\twrqu-\u003eessid.length = 0;\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=6979=static int ipw2100_wx_set_nick(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6995-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:6996:\tIPW_DEBUG_WX(\"SET Nickname -\u003e %s\\n\", priv-\u003enick);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-6997-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=7001=static int ipw2100_wx_get_nick(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7014-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:7015:\tIPW_DEBUG_WX(\"GET Nickname -\u003e %s\\n\", extra);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7016-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=7020=static int ipw2100_wx_set_rate(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7053-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:7054:\tIPW_DEBUG_WX(\"SET Rate -\u003e %04X\\n\", rate);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7055- done:\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=7060=static int ipw2100_wx_get_rate(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7083-\tif (err) {\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:7084:\t\tIPW_DEBUG_WX(\"failed querying ordinals.\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7085-\t\tgoto done;\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7104-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:7105:\tIPW_DEBUG_WX(\"GET Rate -\u003e %d\\n\", wrqu-\u003ebitrate.value);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7106-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=7112=static int ipw2100_wx_set_rts(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7140-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:7141:\tIPW_DEBUG_WX(\"SET RTS Threshold -\u003e 0x%08X\\n\", value);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7142- done:\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=7147=static int ipw2100_wx_get_rts(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7162-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:7163:\tIPW_DEBUG_WX(\"GET RTS Threshold -\u003e 0x%08X\\n\", wrqu-\u003erts.value);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7164-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=7168=static int ipw2100_wx_set_txpow(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7201-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:7202:\tIPW_DEBUG_WX(\"SET TX Power -\u003e %d\\n\", value);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7203-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=7209=static int ipw2100_wx_get_txpow(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7230-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:7231:\tIPW_DEBUG_WX(\"GET TX Power -\u003e %d\\n\", wrqu-\u003etxpower.value);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7232-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=7236=static int ipw2100_wx_set_frag(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7260-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:7261:\tIPW_DEBUG_WX(\"SET Frag Threshold -\u003e %d\\n\", priv-\u003eieee-\u003efts);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7262-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=7266=static int ipw2100_wx_get_frag(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7278-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:7279:\tIPW_DEBUG_WX(\"GET Frag Threshold -\u003e %d\\n\", wrqu-\u003efrag.value);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7280-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=7284=static int ipw2100_wx_set_retry(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7304-\t\terr = ipw2100_set_short_retry(priv, wrqu-\u003eretry.value);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:7305:\t\tIPW_DEBUG_WX(\"SET Short Retry Limit -\u003e %d\\n\",\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7306-\t\t\t wrqu-\u003eretry.value);\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7311-\t\terr = ipw2100_set_long_retry(priv, wrqu-\u003eretry.value);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:7312:\t\tIPW_DEBUG_WX(\"SET Long Retry Limit -\u003e %d\\n\",\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7313-\t\t\t wrqu-\u003eretry.value);\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7320-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:7321:\tIPW_DEBUG_WX(\"SET Both Retry Limits -\u003e %d\\n\", wrqu-\u003eretry.value);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7322-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=7328=static int ipw2100_wx_get_retry(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7354-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:7355:\tIPW_DEBUG_WX(\"GET Retry -\u003e %d\\n\", wrqu-\u003eretry.value);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7356-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=7360=static int ipw2100_wx_set_scan(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7372-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:7373:\tIPW_DEBUG_WX(\"Initiating scan...\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7374-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7376-\tif (ipw2100_set_scan_options(priv) || ipw2100_start_scan(priv)) {\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:7377:\t\tIPW_DEBUG_WX(\"Start scan failed.\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7378-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=7427=static int ipw2100_wx_set_power(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7442-\t\terr = ipw2100_set_power_mode(priv, IPW_POWER_MODE_CAM);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:7443:\t\tIPW_DEBUG_WX(\"SET Power Management Mode -\u003e off\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7444-\t\tgoto done;\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7452-\tdefault:\t\t/* Otherwise we don't support it */\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:7453:\t\tIPW_DEBUG_WX(\"SET PM Mode: %X not supported.\\n\",\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7454-\t\t\t wrqu-\u003epower.flags);\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7463-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:7464:\tIPW_DEBUG_WX(\"SET Power Management Mode -\u003e 0x%02X\\n\", priv-\u003epower_mode);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7465-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=7472=static int ipw2100_wx_get_power(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7488-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:7489:\tIPW_DEBUG_WX(\"GET Power Management Mode -\u003e %02X\\n\", priv-\u003epower_mode);\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-7490-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=8065=static struct iw_statistics *ipw2100_wx_wireless_stats(struct net_device *dev)\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-8169-\t\tif (beacon_qual == quality)\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:8170:\t\t\tIPW_DEBUG_WX(\"Quality clamped by Missed Beacons\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-8171-\t\telse if (tx_qual == quality)\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:8172:\t\t\tIPW_DEBUG_WX(\"Quality clamped by Tx Retries\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-8173-\t\telse if (quality != 100)\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:8174:\t\t\tIPW_DEBUG_WX(\"Quality clamped by Signal Strength\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-8175-\t\telse\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:8176:\t\t\tIPW_DEBUG_WX(\"Quality not clamped.\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-8177-#endif\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-8197- fail_get_ordinal:\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:8198:\tIPW_DEBUG_WX(\"failed querying ordinals.\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-8199-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c=8213=static void ipw2100_wx_event_work(struct work_struct *work)\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-8224-\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:8225:\tIPW_DEBUG_WX(\"enter\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-8226-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-8248-\tif (!(priv-\u003estatus \u0026 STATUS_ASSOCIATED)) {\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c:8249:\t\tIPW_DEBUG_WX(\"Configuring ESSID\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2100.c-8250-\t\tmutex_lock(\u0026priv-\u003eaction_mutex);\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.h=39=struct ipw2100_rx_packet;\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2100.h-99-#define IPW_DEBUG_INFO(f...) IPW_DEBUG(IPW_DL_INFO, ## f)\ndrivers/net/wireless/intel/ipw2x00/ipw2100.h:100:#define IPW_DEBUG_WX(f...) IPW_DEBUG(IPW_DL_WX, ## f)\ndrivers/net/wireless/intel/ipw2x00/ipw2100.h-101-#define IPW_DEBUG_SCAN(f...) IPW_DEBUG(IPW_DL_SCAN, ## f)\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=6021=static void ipw_set_fixed_rate(struct ipw_priv *priv, int mode)\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-6036-\t\t\t/* Invalid fixed rate mask */\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:6037:\t\t\tIPW_DEBUG_WX\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-6038-\t\t\t (\"invalid fixed rate mask in ipw_set_fixed_rate\\n\");\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-6050-\t\t\t\t/* Invalid fixed rate mask */\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:6051:\t\t\t\tIPW_DEBUG_WX\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-6052-\t\t\t\t (\"invalid fixed rate mask in ipw_set_fixed_rate\\n\");\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-6061-\t\t\t/* Invalid fixed rate mask */\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:6062:\t\t\tIPW_DEBUG_WX\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-6063-\t\t\t (\"invalid fixed rate mask in ipw_set_fixed_rate\\n\");\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=6222=static int ipw_request_scan_helper(struct ipw_priv *priv, int type, int direct)\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-6264-\tif (type == IW_SCAN_TYPE_PASSIVE) {\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:6265:\t\tIPW_DEBUG_WX(\"use passive scanning\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-6266-\t\tscan_type = IPW_SCAN_PASSIVE_FULL_DWELL_SCAN;\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=8600=static int ipw_wx_set_freq(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8611-\tif (fwrq-\u003em == 0) {\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:8612:\t\tIPW_DEBUG_WX(\"SET Freq/Channel -\u003e any\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8613-\t\tmutex_lock(\u0026priv-\u003emutex);\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8636-\t\tif (flags \u0026 LIBIPW_CH_PASSIVE_ONLY) {\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:8637:\t\t\tIPW_DEBUG_WX(\"Invalid Ad-Hoc channel for 802.11a\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8638-\t\t\treturn -EINVAL;\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8641-\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:8642:\tIPW_DEBUG_WX(\"SET Freq/Channel -\u003e %d\\n\", fwrq-\u003em);\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8643-\tmutex_lock(\u0026priv-\u003emutex);\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=8649=static int ipw_wx_get_freq(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8683-\tmutex_unlock(\u0026priv-\u003emutex);\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:8684:\tIPW_DEBUG_WX(\"GET Freq/Channel -\u003e %d\\n\", priv-\u003echannel);\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8685-\treturn 0;\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=8688=static int ipw_wx_set_mode(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8694-\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:8695:\tIPW_DEBUG_WX(\"Set MODE: %d\\n\", wrqu-\u003emode);\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8696-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=8740=static int ipw_wx_get_mode(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8746-\twrqu-\u003emode = priv-\u003eieee-\u003eiw_mode;\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:8747:\tIPW_DEBUG_WX(\"Get MODE -\u003e %d\\n\", wrqu-\u003emode);\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8748-\tmutex_unlock(\u0026priv-\u003emutex);\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=8769=static int ipw_wx_get_range(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8858-\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:8859:\tIPW_DEBUG_WX(\"GET Range\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8860-\treturn 0;\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=8863=static int ipw_wx_set_wap(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8874-\t\t/* we disable mandatory BSSID association */\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:8875:\t\tIPW_DEBUG_WX(\"Setting AP BSSID to ANY\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8876-\t\tpriv-\u003econfig \u0026= ~CFG_STATIC_BSSID;\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8885-\tif (ether_addr_equal(priv-\u003ebssid, wrqu-\u003eap_addr.sa_data)) {\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:8886:\t\tIPW_DEBUG_WX(\"BSSID set to current BSSID.\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8887-\t\tmutex_unlock(\u0026priv-\u003emutex);\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8890-\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:8891:\tIPW_DEBUG_WX(\"Setting mandatory BSSID to %pM\\n\",\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8892-\t\t wrqu-\u003eap_addr.sa_data);\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=8905=static int ipw_wx_get_wap(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8920-\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:8921:\tIPW_DEBUG_WX(\"Getting WAP BSSID: %pM\\n\",\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8922-\t\t wrqu-\u003eap_addr.sa_data);\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=8927=static int ipw_wx_set_essid(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8937- {\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:8938: IPW_DEBUG_WX(\"Setting ESSID to ANY\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8939- ipw_disassociate(priv);\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8951-\t \u0026\u0026 (priv-\u003estatus \u0026 (STATUS_ASSOCIATED | STATUS_ASSOCIATING))) {\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:8952:\t\tIPW_DEBUG_WX(\"ESSID set to current ESSID.\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8953-\t\tmutex_unlock(\u0026priv-\u003emutex);\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8956-\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:8957:\tIPW_DEBUG_WX(\"Setting ESSID: '%*pE' (%d)\\n\", length, extra, length);\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8958-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=8971=static int ipw_wx_get_essid(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8981-\t priv-\u003estatus \u0026 (STATUS_ASSOCIATED | STATUS_ASSOCIATING)) {\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:8982:\t\tIPW_DEBUG_WX(\"Getting essid: '%*pE'\\n\",\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8983-\t\t\t priv-\u003eessid_len, priv-\u003eessid);\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8987-\t} else {\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:8988:\t\tIPW_DEBUG_WX(\"Getting essid: ANY\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-8989-\t\twrqu-\u003eessid.length = 0;\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=8996=static int ipw_wx_set_nick(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9001-\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:9002:\tIPW_DEBUG_WX(\"Setting nick to '%s'\\n\", extra);\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9003-\tif (wrqu-\u003edata.length \u003e IW_ESSID_MAX_SIZE)\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=9015=static int ipw_wx_get_nick(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9019-\tstruct ipw_priv *priv = libipw_priv(dev);\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:9020:\tIPW_DEBUG_WX(\"Getting nick\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9021-\tmutex_lock(\u0026priv-\u003emutex);\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=9029=static int ipw_wx_set_sens(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9035-\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:9036:\tIPW_DEBUG_WX(\"Setting roaming threshold to %d\\n\", wrqu-\u003esens.value);\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:9037:\tIPW_DEBUG_WX(\"Setting disassociate threshold to %d\\n\", 3*wrqu-\u003esens.value);\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9038-\tmutex_lock(\u0026priv-\u003emutex);\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=9059=static int ipw_wx_get_sens(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9068-\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:9069:\tIPW_DEBUG_WX(\"GET roaming threshold -\u003e %s %d\\n\",\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9070-\t\t wrqu-\u003epower.disabled ? \"OFF\" : \"ON\", wrqu-\u003epower.value);\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=9075=static int ipw_wx_set_rate(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9157-\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:9158:\tIPW_DEBUG_WX(\"invalid rate specified, returning error\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9159-\treturn -EINVAL;\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9161- apply:\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:9162:\tIPW_DEBUG_WX(\"Setting rate mask to 0x%08X [%s]\\n\",\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9163-\t\t mask, fixed ? \"fixed\" : \"sub-rates\");\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9171-\tif (priv-\u003erates_mask == mask) {\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:9172:\t\tIPW_DEBUG_WX(\"Mask set to current mask.\\n\");\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9173-\t\tmutex_unlock(\u0026priv-\u003emutex);\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=9188=static int ipw_wx_get_rate(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9196-\tmutex_unlock(\u0026priv-\u003emutex);\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:9197:\tIPW_DEBUG_WX(\"GET Rate -\u003e %d\\n\", wrqu-\u003ebitrate.value);\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9198-\treturn 0;\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=9201=static int ipw_wx_set_rts(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9219-\tmutex_unlock(\u0026priv-\u003emutex);\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:9220:\tIPW_DEBUG_WX(\"SET RTS Threshold -\u003e %d\\n\", priv-\u003erts_threshold);\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9221-\treturn 0;\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=9224=static int ipw_wx_get_rts(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9233-\tmutex_unlock(\u0026priv-\u003emutex);\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:9234:\tIPW_DEBUG_WX(\"GET RTS Threshold -\u003e %d\\n\", wrqu-\u003erts.value);\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9235-\treturn 0;\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=9272=static int ipw_wx_get_txpow(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9283-\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:9284:\tIPW_DEBUG_WX(\"GET TX Power -\u003e %s %d\\n\",\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9285-\t\t wrqu-\u003epower.disabled ? \"OFF\" : \"ON\", wrqu-\u003epower.value);\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=9290=static int ipw_wx_set_frag(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9309-\tmutex_unlock(\u0026priv-\u003emutex);\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:9310:\tIPW_DEBUG_WX(\"SET Frag Threshold -\u003e %d\\n\", wrqu-\u003efrag.value);\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9311-\treturn 0;\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=9314=static int ipw_wx_get_frag(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9323-\tmutex_unlock(\u0026priv-\u003emutex);\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:9324:\tIPW_DEBUG_WX(\"GET Frag Threshold -\u003e %d\\n\", wrqu-\u003efrag.value);\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9325-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=9329=static int ipw_wx_set_retry(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9356-\tmutex_unlock(\u0026priv-\u003emutex);\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:9357:\tIPW_DEBUG_WX(\"SET retry limit -\u003e short:%d long:%d\\n\",\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9358-\t\t priv-\u003eshort_retry_limit, priv-\u003elong_retry_limit);\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=9362=static int ipw_wx_get_retry(struct net_device *dev,\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9387-\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c:9388:\tIPW_DEBUG_WX(\"GET retry -\u003e %d\\n\", wrqu-\u003eretry.value);\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c-9389-\n--\ndrivers/net/wireless/intel/ipw2x00/ipw2200.c=9393=static int ipw_wx_set_scan(struct net_device *dev,\n--\n\n"
} |
| 23/2 | 2026/06/30 05:41 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 30840 output: 23 thoughts: 170 Thoughts: **Analyzing the Page Table Debugging Configuration** Okay, so I'm looking at this configuration code, and `DEBUG_WX` seems to be a general option. Right, so `CONFIG_PTDUMP_DEBUGFS` and `CONFIG_DEBUG_WX` are the real players here, since they leverage `ptdump_walk_pgd`. Hmm, now the question is: is `CONFIG_DEBUG_WX` enabled by default, or do I need to explicitly include it? It's probably better to go ahead and incorporate both `PTDUMP_DEBUGFS` and `DEBUG_WX` into `EnableConfigs` to keep things clean. Wait a minute, this patch also changes `walk_page_range_debug` so it's calling `walk_kernel_page_table_range` when it's operating on `&init_mm`. Okay, and that `walk_kernel_page_table_range` function is defined in `mm/pagewalk.c`. I should probably take a look at the definition of `walk_kernel_page_table_range` now to get a full picture. |
| 24/2 | 2026/06/30 05:41 | tool | grepper |
0mArgs:{
"Expression": "walk_kernel_page_table_range"
}Results: {
"Output": "Documentation/mm/process_addrs.rst=368=establishing and tearing down page its page tables.\nDocumentation/mm/process_addrs.rst-369-\nDocumentation/mm/process_addrs.rst:370:However, for convenience we provide the :c:func:`!walk_kernel_page_table_range`\nDocumentation/mm/process_addrs.rst-371-function which is synchronised via the mmap lock on the :c:macro:`!init_mm`\n--\narch/arm64/mm/mmu.c=925=static int range_split_to_ptes(unsigned long start, unsigned long end, gfp_t gfp)\n--\narch/arm64/mm/mmu.c-929-\tlazy_mmu_mode_enable();\narch/arm64/mm/mmu.c:930:\tret = walk_kernel_page_table_range_lockless(start, end,\narch/arm64/mm/mmu.c-931-\t\t\t\t\t\u0026split_to_ptes_ops, NULL, \u0026gfp);\n--\narch/arm64/mm/pageattr.c=105=static int update_range_prot(unsigned long start, unsigned long size,\n--\narch/arm64/mm/pageattr.c-124-\t */\narch/arm64/mm/pageattr.c:125:\tret = walk_kernel_page_table_range_lockless(start, start + size,\narch/arm64/mm/pageattr.c-126-\t\t\t\t\t\t \u0026pageattr_ops, NULL, \u0026data);\n--\narch/loongarch/mm/pageattr.c=107=static int __set_memory(unsigned long addr, int numpages, pgprot_t set_mask, pgprot_t clear_mask)\n--\narch/loongarch/mm/pageattr.c-120-\tmmap_write_lock(\u0026init_mm);\narch/loongarch/mm/pageattr.c:121:\tret = walk_kernel_page_table_range(start, end, \u0026pageattr_ops, NULL, \u0026masks);\narch/loongarch/mm/pageattr.c-122-\tmmap_write_unlock(\u0026init_mm);\n--\narch/openrisc/kernel/dma.c=65=void *arch_dma_set_uncached(void *cpu_addr, size_t size)\n--\narch/openrisc/kernel/dma.c-74-\tmmap_write_lock(\u0026init_mm);\narch/openrisc/kernel/dma.c:75:\terror = walk_kernel_page_table_range(va, va + size,\narch/openrisc/kernel/dma.c-76-\t\t\t\u0026set_nocache_walk_ops, NULL, NULL);\n--\narch/openrisc/kernel/dma.c=84=void arch_dma_clear_uncached(void *cpu_addr, size_t size)\n--\narch/openrisc/kernel/dma.c-89-\t/* walk_page_range shouldn't be able to fail here */\narch/openrisc/kernel/dma.c:90:\tWARN_ON(walk_kernel_page_table_range(va, va + size,\narch/openrisc/kernel/dma.c-91-\t\t\t\u0026clear_nocache_walk_ops, NULL, NULL));\n--\narch/riscv/mm/pageattr.c=262=static int __set_memory(unsigned long addr, int numpages, pgprot_t set_mask,\n--\narch/riscv/mm/pageattr.c-301-\narch/riscv/mm/pageattr.c:302:\t\t\tret = walk_kernel_page_table_range(lm_start, lm_end,\narch/riscv/mm/pageattr.c-303-\t\t\t\t\t\t \u0026pageattr_ops, NULL, \u0026masks);\n--\narch/riscv/mm/pageattr.c-319-\narch/riscv/mm/pageattr.c:320:\t\tret = walk_kernel_page_table_range(lm_start, lm_end,\narch/riscv/mm/pageattr.c-321-\t\t\t\t\t \u0026pageattr_ops, NULL, \u0026masks);\n--\narch/riscv/mm/pageattr.c-325-\narch/riscv/mm/pageattr.c:326:\tret = walk_kernel_page_table_range(start, end, \u0026pageattr_ops, NULL,\narch/riscv/mm/pageattr.c-327-\t\t\t\t \u0026masks);\n--\narch/riscv/mm/pageattr.c-337-#else\narch/riscv/mm/pageattr.c:338:\tret = walk_kernel_page_table_range(start, end, \u0026pageattr_ops, NULL,\narch/riscv/mm/pageattr.c-339-\t\t\t\t \u0026masks);\n--\ninclude/linux/pagewalk.h=131=int walk_page_range(struct mm_struct *mm, unsigned long start,\n--\ninclude/linux/pagewalk.h-133-\t\tvoid *private);\ninclude/linux/pagewalk.h:134:int walk_kernel_page_table_range(unsigned long start,\ninclude/linux/pagewalk.h-135-\t\tunsigned long end, const struct mm_walk_ops *ops,\ninclude/linux/pagewalk.h-136-\t\tpgd_t *pgd, void *private);\ninclude/linux/pagewalk.h:137:int walk_kernel_page_table_range_lockless(unsigned long start,\ninclude/linux/pagewalk.h-138-\t\tunsigned long end, const struct mm_walk_ops *ops,\n--\nmm/hugetlb_vmemmap.c=156=static int vmemmap_remap_range(unsigned long start, unsigned long end,\n--\nmm/hugetlb_vmemmap.c-163-\tmmap_read_lock(\u0026init_mm);\nmm/hugetlb_vmemmap.c:164:\tret = walk_kernel_page_table_range(start, end, \u0026vmemmap_remap_ops,\nmm/hugetlb_vmemmap.c-165-\t\t\t\t NULL, walk);\n--\nmm/pagewalk.c=597=int walk_page_range(struct mm_struct *mm, unsigned long start,\n--\nmm/pagewalk.c-607-/**\nmm/pagewalk.c:608: * walk_kernel_page_table_range - walk a range of kernel pagetables.\nmm/pagewalk.c-609- * @start:\tstart address of the virtual address range\n--\nmm/pagewalk.c-624- */\nmm/pagewalk.c:625:int walk_kernel_page_table_range(unsigned long start, unsigned long end,\nmm/pagewalk.c-626-\t\tconst struct mm_walk_ops *ops, pgd_t *pgd, void *private)\n--\nmm/pagewalk.c-637-\nmm/pagewalk.c:638:\treturn walk_kernel_page_table_range_lockless(start, end, ops, pgd,\nmm/pagewalk.c-639-\t\t\t\t\t\t private);\n--\nmm/pagewalk.c-647- */\nmm/pagewalk.c:648:int walk_kernel_page_table_range_lockless(unsigned long start, unsigned long end,\nmm/pagewalk.c-649-\t\tconst struct mm_walk_ops *ops, pgd_t *pgd, void *private)\n--\nmm/pagewalk.c=682=int walk_page_range_debug(struct mm_struct *mm, unsigned long start,\n--\nmm/pagewalk.c-697-\t\t\t\t \"RCU read lock must be held across kernel page table walk\");\nmm/pagewalk.c:698:\t\treturn walk_kernel_page_table_range(start, end, ops, pgd,\nmm/pagewalk.c-699-\t\t\t\t\t\t\tprivate);\n"
} |
| 25/2 | 2026/06/30 05:41 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 33291 output: 20 thoughts: 469 Thoughts: **Analyzing the Concurrency Implications of Page Table Debugging** Okay, let's break this down. It seems the core issue revolves around how the page table walking code interacts with RCU (Read-Copy-Update) locks, especially in the context of debugging. My initial thought is that `walk_kernel_page_table_range` is used within `walk_page_range_debug`, particularly when dealing with the initial memory map (`mm == &init_mm`). This `walk_page_range_debug` function, in turn, is called by `ptdump_walk_pgd`, which sounds like our critical debugging entry point. However, I need to keep in mind that `walk_kernel_page_table_range` has other callers too, like `vmemmap_remap_range` and `__set_memory`. The patch specifically targets `walk_page_range_debug`, adding an `RCU_LOCKDEP_WARN` check. This strongly suggests the developers are concerned about potential RCU lock issues in this function, so it has to be a critical point. Therefore, the key symbols that warrant further investigation are: `pagetable_free_kernel`, `kernel_pgtable_free_rcu`, `kernel_pgtable_work_func`, `ptdump_walk_pgd`, and `walk_page_range_debug`. I need to understand how these pieces fit together, especially concerning RCU usage. Now, let's see if the asynchronous path is always present. Checking `kernel_pgtable_work_func`, it's clear that it is controlled by `#ifdef CONFIG_ASYNC_KERNEL_PGTABLE_FREE`. Okay, but if that's not enabled, `pagetable_free_kernel` calls `call_rcu(&pt->pt_rcu_head, kernel_pgtable_free_rcu)`. So, at least, `kernel_pgtable_free_rcu` is always compiled and part of this subsystem, and so is `pagetable_free_kernel`. Let's quickly check how `CONFIG_ASYNC_KERNEL_PGTABLE_FREE` is enabled. Ah, it's selected by x86 systems if `IOMMU_SVA` is defined. This gives me an idea - I can probably reproduce this scenario by including `PTDUMP_DEBUGFS` and `DEBUG_WX` in the configuration. It seems like the simplest way to get the debug facilities enabled, as these options are likely to bring in the necessary code paths. Now, I need to confirm that `PTDUMP_DEBUGFS` and `DEBUG_WX` are available, which likely means checking the relevant debug Kconfig files like `mm/Kconfig.debug` and `lib/Kconfig.debug`. |
| 26/2 | 2026/06/30 05:41 | tool | grepper |
0mArgs:{
"Expression": "config PTDUMP_DEBUGFS"
}Results: {
"Output": "mm/Kconfig.debug=219=config PTDUMP\n--\nmm/Kconfig.debug-221-\nmm/Kconfig.debug:222:config PTDUMP_DEBUGFS\nmm/Kconfig.debug-223-\tbool \"Export kernel pagetable layout to userspace via debugfs\"\n"
} |
| 27/2 | 2026/06/30 05:41 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 34459 output: 18 thoughts: 7 Thoughts: Okay, here's my attempt at summarizing the thought process, tailored for an expert user and presented in the first person: **My Brain's Scramble on a Debug Flag** Alright, let's see... I'm looking at this code, and that little flag, `DEBUG_WX`, just popped into my head. It's a classic. Immediately, I'm thinking about the implications. Is this a local setting or a global one? What specific module or section of the code is it tied to? Is it a compile-time flag, or a runtime configuration? The specific naming convention immediately tells me that this is likely a flag to show debugging information in a Windowing environment. I instantly think of my prior work in similar projects. What's the WX library it is pointing to? Is this referring to a specific GUI toolkit like wxWidgets? What kind of debug output are we talking about here? Tracing, verbose logging, perhaps even assertion handling? I need to quickly assess its scope. Where is it defined? How is it used? I start mentally tracing how it might influence the execution flow. I need to figure out the granularity of the debugging this flag enables, and what it's *supposed* to do. It can drastically impact performance. A quick mental search through the surrounding code for `ifdef` statements or conditional checks is in order. I'm already formulating questions in my mind: Are there any related environment variables, configuration files, or command-line arguments that might also control the debug behavior? How can I verify that this flag is *actually* working as intended? Will turning it on, or off, introduce any regressions? I'm already anticipating the need for careful testing, whether it's unit tests, integration tests, or even manual UI interaction depending on the context. If I'm using an IDE I'm probably mentally checking my debugger settings to ensure that the IDE knows that the environment for this setting exists. This is the kind of detail that separates finding the root cause of an issue, and simply making random changes. I need to understand this flag *before* I go any further. |
| 28/2 | 2026/06/30 05:41 | tool | grepper |
0mArgs:{
"Expression": "config DEBUG_WX"
}Results: {
"Output": "mm/Kconfig.debug=183=config ARCH_HAS_DEBUG_WX\n--\nmm/Kconfig.debug-185-\nmm/Kconfig.debug:186:config DEBUG_WX\nmm/Kconfig.debug-187-\tbool \"Warn on W+X mappings at boot\"\n"
} |
| 29/2 | 2026/06/30 05:41 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 35015 output: 21 thoughts: 63 Thoughts: Okay, let's see, I need to get this right. **Examining the Relevant Configurations** Right, so I've zeroed in on `PTDUMP_DEBUGFS` and `DEBUG_WX` as the key configs to examine here. I'm pretty certain about that. Now, I vaguely recall seeing `ASYNC_KERNEL_PGTABLE_FREE` in the mix, but I know it's not a standalone, it's actually dependent on `IOMMU_SVA`. Okay, that makes sense - let's switch gears and focus on `IOMMU_SVA` itself. I need to understand its implications in relation to these other settings. It's the lynchpin, it would appear. |
| 30/2 | 2026/06/30 05:41 | tool | grepper |
0mArgs:{
"Expression": "config IOMMU_SVA"
}Results: {
"Output": "drivers/iommu/Kconfig=153=config IOMMU_DMA\n--\ndrivers/iommu/Kconfig-161-# Shared Virtual Addressing\ndrivers/iommu/Kconfig:162:config IOMMU_SVA\ndrivers/iommu/Kconfig-163-\tselect IOMMU_MM_DATA\n"
} |
| 31/2 | 2026/06/30 05:41 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 35351 output: 25 thoughts: 270 Thoughts: **My Assessment of the Kernel Page Table Freeing Patch** Okay, so I'm looking at this patch and my initial thought is, we can definitely enable fuzzing. The change touches core memory management, specifically how the kernel frees page tables. Deferring the freeing process using RCU to prevent those nasty use-after-free errors during lockless page table walks - like when `ptdump` is running - is a significant functional change. This is something that could very well expose some interesting issues. My reasoning here is that it's altering the fundamental lifecycle of kernel page tables. And that's usually fertile ground for finding subtle race conditions or memory corruption. I'm keying in on a few symbols here. Specifically, `pagetable_free_kernel`, `kernel_pgtable_free_rcu`, and `kernel_pgtable_work_func`, those are the obvious ones. Then, `ptdump_walk_pgd` and `walk_page_range_debug` – these functions are directly related to the issue the patch intends to solve. The suggested `EnableConfigs` look solid – `PTDUMP_DEBUGFS`, `DEBUG_WX`, and `IOMMU_SVA` will all help with testing. I like `IOMMU_SVA` because it guarantees that `ASYNC_KERNEL_PGTABLE_FREE` is enabled. Wait a sec...I need to check `IOMMU_SVA` because it is not available on all architectures, but x86 automatically selects `ASYNC_KERNEL_PGTABLE_FREE` if `IOMMU_SVA` is enabled. Let me re-check `ASYNC_KERNEL_PGTABLE_FREE` to confirm it is actually available for fuzzing. |
| 32/2 | 2026/06/30 05:41 | tool | grepper |
0mArgs:{
"Expression": "config ASYNC_KERNEL_PGTABLE_FREE"
}Results: {
"Output": "mm/Kconfig=1020=config HAVE_GIGANTIC_FOLIOS\n--\nmm/Kconfig-1023-\nmm/Kconfig:1024:config ASYNC_KERNEL_PGTABLE_FREE\nmm/Kconfig-1025-\tdef_bool n\n"
} |
| 33/2 | 2026/06/30 05:41 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 36101 output: 160 thoughts: 377 Thoughts: **My Analysis of the Configuration Dependency and Code Changes** Okay, so I'm looking at this `def_bool n` option, specifically the one targeted for x86. I see that I can't directly enable it with `EnableConfigs`, since it lacks an associated prompt. The key to activating this thing on x86 appears to be enabling `IOMMU_SVA` – good. That's the route I need to take. Now, let's just make sure I have all the symbols accounted for. I'm going to double check `walk_page_range_debug`. Right, I remember that's defined in `mm/pagewalk.c`. And `ptdump_walk_pgd` is in `mm/ptdump.c`. `pagetable_free_kernel`, and `kernel_pgtable_free_rcu` are both in `mm/pgtable-generic.c`. While `kernel_pgtable_work_func` is also there. Are there any other functions involved here? Hmm, I see that `walk_kernel_page_table_range` and `walk_kernel_page_table_range_lockless` have been modified in comments, but not in any code. Alright, the code changes themselves: I see the `pagetable_free_kernel` declaration in `include/linux/mm.h`. In `mm/pagewalk.c`, `walk_page_range_debug` now includes an `RCU_LOCKDEP_WARN`. In `mm/pgtable-generic.c`, the changes are `kernel_pgtable_free_rcu`, `kernel_pgtable_work_func`, and the aforementioned `pagetable_free_kernel`. Lastly, `mm/ptdump.c` now has `ptdump_walk_pgd` adding `rcu_read_lock()`. So, it's pretty clear: the core focus is precisely the symbols I identified initially. Looks good to me. I'm ready to call `set-results`. |
| 34/2 | 2026/06/30 05:41 | tool | set-results |
0mArgs:{
"EnableConfigs": [
"PTDUMP_DEBUGFS",
"DEBUG_WX",
"IOMMU_SVA"
],
"FocusSymbols": [
"pagetable_free_kernel",
"kernel_pgtable_free_rcu",
"kernel_pgtable_work_func",
"ptdump_walk_pgd",
"walk_page_range_debug"
],
"Reasoning": "The patch modifies the core memory management logic to defer freeing of kernel page tables using RCU. This prevents use-after-free bugs during lockless page table walks, such as those performed by ptdump. This is a functional change affecting the lifecycle of kernel page tables.",
"WorthFuzzing": true
}Results: {
"EnableConfigs": [
"PTDUMP_DEBUGFS",
"DEBUG_WX",
"IOMMU_SVA"
],
"FocusSymbols": [
"pagetable_free_kernel",
"kernel_pgtable_free_rcu",
"kernel_pgtable_work_func",
"ptdump_walk_pgd",
"walk_page_range_debug"
],
"Reasoning": "The patch modifies the core memory management logic to defer freeing of kernel page tables using RCU. This prevents use-after-free bugs during lockless page table walks, such as those performed by ptdump. This is a functional change affecting the lifecycle of kernel page tables.",
"WorthFuzzing": true
} |
| Total Calls | Total Tokens | Avg Tokens | Total Duration (Seconds) | Avg Duration (Seconds) |
|---|
| Total Calls | Total Duration (Seconds) | Avg Duration (Seconds) |
|---|