AI Trajectory


Trajectory: (Expand/Collapse All)
Seq Timestamp Type Name Duration
0/0 2026/08/06 07:08 flow patch-triage
0m Args:
null

Results:
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only moves arch_numa.c from drivers/base/ to mm/ and its corresponding Kconfig option from drivers/base/Kconfig to mm/Kconfig. There are no functional changes to the code itself.",
  "WorthFuzzing": false
}

1/1 2026/08/06 07:08 action read-patch-diff
0m Args:
null

Results:
{
  "PatchDiff": "commit 68f37ead7d9d441f27567977974620198b4c5d6b\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Thu Aug 6 07:08:39 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/MAINTAINERS b/MAINTAINERS\nindex 5114e6db7307d..465b64f8e93c3 100644\n--- a/MAINTAINERS\n+++ b/MAINTAINERS\n@@ -16880,6 +16880,7 @@ T:\tgit git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock.git fixes\n F:\tDocumentation/core-api/boot-time-mm.rst\n F:\tinclude/linux/kho/abi/memblock.h\n F:\tinclude/linux/memblock.h\n+F:\tmm/arch_numa.c\n F:\tmm/bootmem_info.c\n F:\tmm/memblock.c\n F:\tmm/memtest.c\ndiff --git a/drivers/base/Kconfig b/drivers/base/Kconfig\nindex f7d385cbd3ba4..1d93bfc34490f 100644\n--- a/drivers/base/Kconfig\n+++ b/drivers/base/Kconfig\n@@ -239,13 +239,6 @@ config GENERIC_ARCH_TOPOLOGY\n \t  appropriate scaling, sysfs interface for reading capacity values at\n \t  runtime.\n \n-config GENERIC_ARCH_NUMA\n-\tbool\n-\tselect NUMA_MEMBLKS\n-\thelp\n-\t  Enable support for generic NUMA implementation. Currently, RISC-V\n-\t  and ARM64 use it.\n-\n config FW_DEVLINK_SYNC_STATE_TIMEOUT\n \tbool \"sync_state() behavior defaults to timeout instead of strict\"\n \thelp\ndiff --git a/drivers/base/Makefile b/drivers/base/Makefile\nindex 8074a10183dcb..435710f643a5c 100644\n--- a/drivers/base/Makefile\n+++ b/drivers/base/Makefile\n@@ -25,7 +25,6 @@ obj-$(CONFIG_PINCTRL) += pinctrl.o\n obj-$(CONFIG_DEV_COREDUMP) += devcoredump.o\n obj-$(CONFIG_GENERIC_MSI_IRQ) += platform-msi.o\n obj-$(CONFIG_GENERIC_ARCH_TOPOLOGY) += arch_topology.o\n-obj-$(CONFIG_GENERIC_ARCH_NUMA) += arch_numa.o\n obj-$(CONFIG_ACPI) += physical_location.o\n \n obj-y\t\t\t+= test/\ndiff --git a/mm/Kconfig b/mm/Kconfig\nindex 9e0ca48249054..410b8a0a92b91 100644\n--- a/mm/Kconfig\n+++ b/mm/Kconfig\n@@ -1469,6 +1469,13 @@ config NUMA_EMU\n \t  into virtual nodes when booted with \"numa=fake=N\", where N is the\n \t  number of nodes. This is only useful for debugging.\n \n+config GENERIC_ARCH_NUMA\n+\tbool\n+\tselect NUMA_MEMBLKS\n+\thelp\n+\t  Enable support for generic NUMA implementation. Currently, RISC-V\n+\t  and ARM64 use it.\n+\n config ARCH_HAS_USER_SHADOW_STACK\n \tbool\n \thelp\ndiff --git a/mm/Makefile b/mm/Makefile\nindex eff9f9e7e061c..fd29be716fa81 100644\n--- a/mm/Makefile\n+++ b/mm/Makefile\n@@ -122,6 +122,7 @@ obj-$(CONFIG_CMA)\t+= cma.o\n obj-$(CONFIG_NUMA) += numa.o\n obj-$(CONFIG_NUMA_MEMBLKS) += numa_memblks.o\n obj-$(CONFIG_NUMA_EMU) += numa_emulation.o\n+obj-$(CONFIG_GENERIC_ARCH_NUMA) += arch_numa.o\n obj-$(CONFIG_BALLOON) += balloon.o\n obj-$(CONFIG_PAGE_EXTENSION) += page_ext.o\n obj-$(CONFIG_PAGE_TABLE_CHECK) += page_table_check.o\ndiff --git a/drivers/base/arch_numa.c b/mm/arch_numa.c\nsimilarity index 100%\nrename from drivers/base/arch_numa.c\nrename to mm/arch_numa.c\n"
}

2/1 2026/08/06 07:08 agent patch-evaluator
0m Model:
best-expensive

Args:
null

Results:
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only moves arch_numa.c from drivers/base/ to mm/ and its corresponding Kconfig option from drivers/base/Kconfig to mm/Kconfig. There are no functional changes to the code itself.",
  "WorthFuzzing": false
}

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).
- Code in vendor-specific PCIe switch, SmartNIC, or GPU drivers (e.g., mlxsw, pds_core, qed,
  ionic, amdgpu) that require physical PCIe hardware cards not emulated in standard QEMU.
- Driver .remove, .shutdown, or pci_unregister_driver teardown callbacks (e.g., igb_remove)
  that are executed only during PCI hot-unplug or sysfs driver unbind operations.

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.
   Prefer non-static, non-inlined API entrypoint functions over internal static helper functions
   (which are inlined by the compiler and do not have distinct symbol addresses).
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.
   Also check "depends on" lines in Kconfig to include any non-standard parent subsystem configs
   needed for Kbuild to compile the code statically into vmlinux. 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 68f37ead7d9d441f27567977974620198b4c5d6b
Author: syz-cluster <triage@syzkaller.com>
Date:   Thu Aug 6 07:08:39 2026 +0000

    syz-cluster: applied patch under review

diff --git a/MAINTAINERS b/MAINTAINERS
index 5114e6db7307d..465b64f8e93c3 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -16880,6 +16880,7 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock.git fixes
 F:	Documentation/core-api/boot-time-mm.rst
 F:	include/linux/kho/abi/memblock.h
 F:	include/linux/memblock.h
+F:	mm/arch_numa.c
 F:	mm/bootmem_info.c
 F:	mm/memblock.c
 F:	mm/memtest.c
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
index f7d385cbd3ba4..1d93bfc34490f 100644
--- a/drivers/base/Kconfig
+++ b/drivers/base/Kconfig
@@ -239,13 +239,6 @@ config GENERIC_ARCH_TOPOLOGY
 	  appropriate scaling, sysfs interface for reading capacity values at
 	  runtime.
 
-config GENERIC_ARCH_NUMA
-	bool
-	select NUMA_MEMBLKS
-	help
-	  Enable support for generic NUMA implementation. Currently, RISC-V
-	  and ARM64 use it.
-
 config FW_DEVLINK_SYNC_STATE_TIMEOUT
 	bool "sync_state() behavior defaults to timeout instead of strict"
 	help
diff --git a/drivers/base/Makefile b/drivers/base/Makefile
index 8074a10183dcb..435710f643a5c 100644
--- a/drivers/base/Makefile
+++ b/drivers/base/Makefile
@@ -25,7 +25,6 @@ obj-$(CONFIG_PINCTRL) += pinctrl.o
 obj-$(CONFIG_DEV_COREDUMP) += devcoredump.o
 obj-$(CONFIG_GENERIC_MSI_IRQ) += platform-msi.o
 obj-$(CONFIG_GENERIC_ARCH_TOPOLOGY) += arch_topology.o
-obj-$(CONFIG_GENERIC_ARCH_NUMA) += arch_numa.o
 obj-$(CONFIG_ACPI) += physical_location.o
 
 obj-y			+= test/
diff --git a/mm/Kconfig b/mm/Kconfig
index 9e0ca48249054..410b8a0a92b91 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -1469,6 +1469,13 @@ config NUMA_EMU
 	  into virtual nodes when booted with "numa=fake=N", where N is the
 	  number of nodes. This is only useful for debugging.
 
+config GENERIC_ARCH_NUMA
+	bool
+	select NUMA_MEMBLKS
+	help
+	  Enable support for generic NUMA implementation. Currently, RISC-V
+	  and ARM64 use it.
+
 config ARCH_HAS_USER_SHADOW_STACK
 	bool
 	help
diff --git a/mm/Makefile b/mm/Makefile
index eff9f9e7e061c..fd29be716fa81 100644
--- a/mm/Makefile
+++ b/mm/Makefile
@@ -122,6 +122,7 @@ obj-$(CONFIG_CMA)	+= cma.o
 obj-$(CONFIG_NUMA) += numa.o
 obj-$(CONFIG_NUMA_MEMBLKS) += numa_memblks.o
 obj-$(CONFIG_NUMA_EMU) += numa_emulation.o
+obj-$(CONFIG_GENERIC_ARCH_NUMA) += arch_numa.o
 obj-$(CONFIG_BALLOON) += balloon.o
 obj-$(CONFIG_PAGE_EXTENSION) += page_ext.o
 obj-$(CONFIG_PAGE_TABLE_CHECK) += page_table_check.o
diff --git a/drivers/base/arch_numa.c b/mm/arch_numa.c
similarity index 100%
rename from drivers/base/arch_numa.c
rename to mm/arch_numa.c

3/2 2026/08/06 07:08 llm patch-evaluator
0m Model:
gemini-3.1-pro-preview

Args:
null

Results:
null

Tokens:
							input: 2950
							output: 78
							thoughts: 233
						

Thoughts:
**Refactoring `arch_numa.c` - Worth Fuzzing?**

Okay, so this patch is essentially just a refactoring. It's moving `arch_numa.c` from `drivers/base/` to `mm/`, which makes sense organizationally. The corresponding `GENERIC_ARCH_NUMA` Kconfig option is also being moved to the `mm/Kconfig` file, which is expected. The `MAINTAINERS` file is being updated to reflect the new location, standard stuff. No functional code changes, right?

Let me double-check... Yes, okay, the diff clearly shows a "similarity index 100%" rename. It's a pure file move. No additions, deletions, or modifications to the actual logic.

Since this is purely a structural change, and the code itself is untouched, there's nothing here to be vulnerable to traditional fuzzing techniques, so I'm confident in saying that this doesn't warrant fuzzing.
I'm marking `WorthFuzzing=false`.



4/2 2026/08/06 07:09 tool set-results
0m Args:
{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only moves arch_numa.c from drivers/base/ to mm/ and its corresponding Kconfig option from drivers/base/Kconfig to mm/Kconfig. There are no functional changes to the code itself.",
  "WorthFuzzing": false
}

Results:
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only moves arch_numa.c from drivers/base/ to mm/ and its corresponding Kconfig option from drivers/base/Kconfig to mm/Kconfig. There are no functional changes to the code itself.",
  "WorthFuzzing": false
}

LLM Calls Summary:
Total Calls Total Tokens Avg Tokens Total Duration (Seconds) Avg Duration (Seconds)
Tool Calls Summary:
Total Calls Total Duration (Seconds) Avg Duration (Seconds)