| Seq | Timestamp | Type | Name | Duration |
|---|---|---|---|---|
| 0/0 | 2026/10/20 13:21 | flow | patch-triage |
1mArgs:null Results: {
"EnableConfigs": null,
"FocusSymbols": [],
"KMSANReasoning": "",
"NeedsKMSAN": false,
"Reasoning": "The patch modifies ipc_protocol_free_msg_get() in drivers/net/wwan/iosm/iosm_ipc_protocol_ops.c, adding a boundary check on the message head index. The IOSM driver specifically targets Intel M.2 WWAN modems (Intel XMM 7360/7560 PCIe devices) and requires physical PCIe hardware not emulated in standard QEMU/GCE virtualized fuzzing environments. Because the device cannot probe, the modified code is structurally unreachable.",
"WorthFuzzing": false
} |
| 1/1 | 2026/10/20 13:21 | action | read-patch-diff |
0mArgs:null Results: {
"PatchDiff": "commit 54cfb55d20f0978d812ff074ace84cf90247c72d\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Tue Oct 20 13:21:26 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/drivers/net/wwan/iosm/iosm_ipc_protocol_ops.c b/drivers/net/wwan/iosm/iosm_ipc_protocol_ops.c\nindex f2f86f41fd10e..004920068c45b 100644\n--- a/drivers/net/wwan/iosm/iosm_ipc_protocol_ops.c\n+++ b/drivers/net/wwan/iosm/iosm_ipc_protocol_ops.c\n@@ -14,6 +14,11 @@ ipc_protocol_free_msg_get(struct iosm_protocol *ipc_protocol, int *index)\n \tu32 new_head = (head + 1) % IPC_MEM_MSG_ENTRIES;\n \tunion ipc_mem_msg_entry *msg;\n \n+\tif (head \u003e= IPC_MEM_MSG_ENTRIES) {\n+\t\tdev_err(ipc_protocol-\u003edev, \"invalid message head %u\", head);\n+\t\treturn NULL;\n+\t}\n+\n \tif (new_head == le32_to_cpu(ipc_protocol-\u003ep_ap_shm-\u003emsg_tail)) {\n \t\tdev_err(ipc_protocol-\u003edev, \"message ring is full\");\n \t\treturn NULL;\n"
} |
| 2/1 | 2026/10/20 13:21 | agent | patch-evaluator |
1mModel:core Args: null Results: {
"EnableConfigs": null,
"FocusSymbols": [],
"Reasoning": "The patch modifies ipc_protocol_free_msg_get() in drivers/net/wwan/iosm/iosm_ipc_protocol_ops.c, adding a boundary check on the message head index. The IOSM driver specifically targets Intel M.2 WWAN modems (Intel XMM 7360/7560 PCIe devices) and requires physical PCIe hardware not emulated in standard QEMU/GCE virtualized fuzzing environments. Because the device cannot probe, the modified code is structurally unreachable.",
"WorthFuzzing": false
}Instruction: You are an expert Linux kernel maintainer and security engineer.
Your job is to review a provided patch series and evaluate whether it warrants fuzzing with syzkaller.
IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in
your workspace. Do NOT rely on internal assumptions. You must actively use your code access
tools to inspect the actual source code, callers, and surrounding context.
================================================================================
1. CORE TRIAGE PHILOSOPHY
================================================================================
The goal of patch fuzzing is to discover crashes, regressions, exposed latent bugs,
and newly triggered assertions introduced by the patch series.
- REACHABILITY IS THE PRIMARY GATE:
Fuzzing can only discover bugs in code that can actually execute in standard virtualized
environments (GCE or QEMU, utilizing software-emulated devices like USB gadgets, netdev, tun/tap).
If the modified code is structurally unreachable (see Section 2), it MUST NOT be fuzzed,
regardless of whether it adds assertions or complex logic.
- DO NOT BLINDLY TRUST "NO FUNCTIONAL CHANGE" (NFCI) OR "REFACTORING" CLAIMS:
Patch authors routinely label changes as "cleanups", "refactorings", or state
"No functional change intended". Do NOT take these claims at face value.
Code refactorings that rearrange logic, introduce helper functions, or alter state management
in core subsystems frequently introduce subtle semantic shifts or uncover latent kernel bugs.
If reachable executable code is modified or refactored, it MUST be fuzzed.
- NEW OR MODIFIED ASSERTIONS IN REACHABLE CODE MUST BE FUZZED:
When a patch introduces or modifies runtime checks or assertions (e.g., WARN_ON*, VM_WARN_ON*,
BUG_ON*, lockdep_assert*) in reachable code paths, it enforces new or stricter invariants.
Even if the author believes the invariant always holds, fuzzing is essential to verify whether
an unusual sequence of operations can violate it.
================================================================================
2. WHEN TO RETURN WorthFuzzing=false (NEGATIVE CRITERIA)
================================================================================
Return WorthFuzzing=false ONLY IF all modified code falls strictly into one or more of these categories:
- Non-kernel and non-executable changes:
* Modifications to Documentation/, comments, or spelling fixes.
* User-space directories, self-tests, samples, or scripts (e.g., tools/, samples/, scripts/, usr/)
that do not affect the compiled kernel image (vmlinux) or kernel modules.
* Purely decorative logging (e.g., message strings in pr_err, printk, dev_info) or tracepoints
that do not alter control flow or data structures.
* Build system or Kconfig changes that do not alter compiled C logic.
- Structurally unreachable hardware:
* Vendor-specific PCIe switches, SmartNICs, or GPU drivers (e.g., mlxsw, pds_core, qed,
ionic, amdgpu) requiring physical ASIC/PCIe cards not emulated in standard QEMU.
- Unreachable execution paths:
* Driver teardown callbacks (.remove, .shutdown, pci_unregister_driver) executed only during
physical PCI hot-unplug or manual sysfs driver unbinding.
* Code paths exclusive to architectures other than the target architecture.
================================================================================
3. WHEN TO RETURN WorthFuzzing=true (POSITIVE CRITERIA)
================================================================================
Return WorthFuzzing=true whenever the patch touches reachable executable code, including:
- Core Subsystems:
* Any logic modifications in memory management (mm/), synchronization/locking (kernel/locking/),
BPF, scheduler, core networking, VFS, or syscall handling.
- Refactorings and Code Cleanups:
* Any restructuring of reachable data structures, helper abstractions, or algorithm flows.
- Runtime Assertions and Defensive Checks:
* Any introduction or alteration of assertions (WARN_ON*, VM_WARN_ON*, BUG_ON*, etc.) in reachable paths.
- Reachable Drivers and Protocols:
* Drivers accessible via virtual buses (virtio, USB gadget, loopback, netlink, binder, sockets, etc.).
================================================================================
4. EXTRACTING FocusSymbols (PREVENTING DILUTION)
================================================================================
When WorthFuzzing=true, you must extract specific kernel functions into FocusSymbols to guide the fuzzer:
- AVOID UBIQUITOUS LIFECYCLE HOT-PATHS:
Do NOT list generic, ubiquitous functions called by almost every program in the corpus
(including, but not limited to: general memory allocators and deallocators, page fault
and trap handlers, or core synchronization primitives; this is not an exhaustive list).
Listing ubiquitous functions causes the fuzzer to classify thousands of unrelated tests as "focused",
which severely dilutes fuzzing effort away from the actual changes.
- TARGET SPECIFIC FEATURE LOGIC AND ENTRYPOINTS:
List functions that specifically implement the logic being added or altered, or direct API entrypoints
for the subsystem feature under review.
- HANDLING STATIC INLINE FUNCTIONS IN HEADERS (.h):
Compiler-inlined static functions (such as static inlines in mm/*.h or include/linux/*.h) lack
distinct symbol addresses in vmlinux and cannot be targeted directly by symbol coverage filters.
If the changes are primarily in static inline helpers, identify non-static, feature-specific caller
functions in .c files that exercise them (avoiding ubiquitous lifecycle wrappers).
================================================================================
5. IDENTIFYING EnableConfigs
================================================================================
Identify any specific CONFIG_ options required to properly compile and reach the modified code:
- Inspect Kconfig files and #ifdef guards; do not make assumptions.
- Check "depends on" lines in Kconfig to include any non-standard parent subsystem configs needed.
- Strip any '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: Target architecture: amd64
For your convenience, here is the diff of the changes:
commit 54cfb55d20f0978d812ff074ace84cf90247c72d
Author: syz-cluster <triage@syzkaller.com>
Date: Tue Oct 20 13:21:26 2026 +0000
syz-cluster: applied patch under review
diff --git a/drivers/net/wwan/iosm/iosm_ipc_protocol_ops.c b/drivers/net/wwan/iosm/iosm_ipc_protocol_ops.c
index f2f86f41fd10e..004920068c45b 100644
--- a/drivers/net/wwan/iosm/iosm_ipc_protocol_ops.c
+++ b/drivers/net/wwan/iosm/iosm_ipc_protocol_ops.c
@@ -14,6 +14,11 @@ ipc_protocol_free_msg_get(struct iosm_protocol *ipc_protocol, int *index)
u32 new_head = (head + 1) % IPC_MEM_MSG_ENTRIES;
union ipc_mem_msg_entry *msg;
+ if (head >= IPC_MEM_MSG_ENTRIES) {
+ dev_err(ipc_protocol->dev, "invalid message head %u", head);
+ return NULL;
+ }
+
if (new_head == le32_to_cpu(ipc_protocol->p_ap_shm->msg_tail)) {
dev_err(ipc_protocol->dev, "message ring is full");
return NULL;
|
| 3/2 | 2026/10/20 13:21 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 3120 output: 43 thoughts: 71 Thoughts: **Analyzing a WWAN Driver Patch** Okay, so I've got this patch that touches `drivers/net/wwan/iosm/iosm_ipc_protocol_ops.c`. My first move is to dive into that specific file. I need to understand exactly what driver this is, its underlying hardware – what kind of platform are we talking about? Is this a standard, widely used device, or something more specialized, perhaps vendor-specific hardware requiring direct PCIe access? I'm going to quickly run `grepper` or just read the file directly. I need to quickly determine the context of this patch. |
| 4/2 | 2026/10/20 13:21 | tool | grepper |
0mArgs:{
"Expression": "iosm",
"PathPrefixes": [
"drivers/net/wwan/iosm/",
"drivers/net/wwan/"
]
}Results: {
"Output": "\nFull output is too long, showing 200 out of 2552 lines.\nUse more precise expression or PathPrefixes if possible.\n\nNumber of matching lines per file (41 files in total):\ndrivers/net/wwan/Makefile:1\ndrivers/net/wwan/iosm/Makefile:23\ndrivers/net/wwan/iosm/iosm_ipc_chnl_cfg.c:1\ndrivers/net/wwan/iosm/iosm_ipc_chnl_cfg.h:1\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c:4\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:11\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.c:5\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.h:4\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:35\ndrivers/net/wwan/iosm/iosm_ipc_devlink.h:37\ndrivers/net/wwan/iosm/iosm_ipc_flash.c:27\ndrivers/net/wwan/iosm/iosm_ipc_flash.h:29\ndrivers/net/wwan/iosm/iosm_ipc_imem.c:67\ndrivers/net/wwan/iosm/iosm_ipc_imem.h:38\ndrivers/net/wwan/iosm/iosm_ipc_imem_ops.c:27\ndrivers/net/wwan/iosm/iosm_ipc_imem_ops.h:16\ndrivers/net/wwan/iosm/iosm_ipc_irq.c:7\ndrivers/net/wwan/iosm/iosm_ipc_irq.h:7\ndrivers/net/wwan/iosm/iosm_ipc_mmio.c:13\ndrivers/net/wwan/iosm/iosm_ipc_mmio.h:12\ndrivers/net/wwan/iosm/iosm_ipc_mux.c:20\ndrivers/net/wwan/iosm/iosm_ipc_mux.h:20\ndrivers/net/wwan/iosm/iosm_ipc_mux_codec.c:45\ndrivers/net/wwan/iosm/iosm_ipc_mux_codec.h:8\ndrivers/net/wwan/iosm/iosm_ipc_pcie.c:39\ndrivers/net/wwan/iosm/iosm_ipc_pcie.h:24\ndrivers/net/wwan/iosm/iosm_ipc_pm.c:16\ndrivers/net/wwan/iosm/iosm_ipc_pm.h:15\ndrivers/net/wwan/iosm/iosm_ipc_port.c:12\ndrivers/net/wwan/iosm/iosm_ipc_port.h:10\ndrivers/net/wwan/iosm/iosm_ipc_protocol.c:22\ndrivers/net/wwan/iosm/iosm_ipc_protocol.h:22\ndrivers/net/wwan/iosm/iosm_ipc_protocol_ops.c:22\ndrivers/net/wwan/iosm/iosm_ipc_protocol_ops.h:24\ndrivers/net/wwan/iosm/iosm_ipc_task_queue.c:6\ndrivers/net/wwan/iosm/iosm_ipc_task_queue.h:6\ndrivers/net/wwan/iosm/iosm_ipc_trace.c:11\ndrivers/net/wwan/iosm/iosm_ipc_trace.h:11\ndrivers/net/wwan/iosm/iosm_ipc_uevent.c:1\ndrivers/net/wwan/iosm/iosm_ipc_wwan.c:41\ndrivers/net/wwan/iosm/iosm_ipc_wwan.h:4\n\ndrivers/net/wwan/Makefile=14=obj-$(CONFIG_RPMSG_WWAN_CTRL) += rpmsg_wwan_ctrl.o\ndrivers/net/wwan/Makefile:15:obj-$(CONFIG_IOSM) += iosm/\ndrivers/net/wwan/Makefile-16-obj-$(CONFIG_MTK_T7XX) += t7xx/\n--\ndrivers/net/wwan/iosm/Makefile-5-\ndrivers/net/wwan/iosm/Makefile:6:iosm-y = \\\ndrivers/net/wwan/iosm/Makefile:7:\tiosm_ipc_task_queue.o\t\\\ndrivers/net/wwan/iosm/Makefile:8:\tiosm_ipc_imem.o\t\t\t\\\ndrivers/net/wwan/iosm/Makefile:9:\tiosm_ipc_imem_ops.o\t\t\\\ndrivers/net/wwan/iosm/Makefile:10:\tiosm_ipc_mmio.o\t\t\t\\\ndrivers/net/wwan/iosm/Makefile:11:\tiosm_ipc_port.o\t\t\t\\\ndrivers/net/wwan/iosm/Makefile:12:\tiosm_ipc_wwan.o\t\t\t\\\ndrivers/net/wwan/iosm/Makefile:13:\tiosm_ipc_uevent.o\t\t\\\ndrivers/net/wwan/iosm/Makefile:14:\tiosm_ipc_pm.o\t\t\t\\\ndrivers/net/wwan/iosm/Makefile:15:\tiosm_ipc_pcie.o\t\t\t\\\ndrivers/net/wwan/iosm/Makefile:16:\tiosm_ipc_irq.o\t\t\t\\\ndrivers/net/wwan/iosm/Makefile:17:\tiosm_ipc_chnl_cfg.o\t\t\\\ndrivers/net/wwan/iosm/Makefile:18:\tiosm_ipc_protocol.o\t\t\\\ndrivers/net/wwan/iosm/Makefile:19:\tiosm_ipc_protocol_ops.o\t\\\ndrivers/net/wwan/iosm/Makefile:20:\tiosm_ipc_mux.o\t\t\t\\\ndrivers/net/wwan/iosm/Makefile:21:\tiosm_ipc_mux_codec.o\t\t\\\ndrivers/net/wwan/iosm/Makefile:22:\tiosm_ipc_devlink.o\t\t\\\ndrivers/net/wwan/iosm/Makefile:23:\tiosm_ipc_flash.o\t\t\\\ndrivers/net/wwan/iosm/Makefile:24:\tiosm_ipc_coredump.o\ndrivers/net/wwan/iosm/Makefile-25-\ndrivers/net/wwan/iosm/Makefile:26:iosm-$(CONFIG_WWAN_DEBUGFS) += \\\ndrivers/net/wwan/iosm/Makefile:27:\tiosm_ipc_debugfs.o\t\t\\\ndrivers/net/wwan/iosm/Makefile:28:\tiosm_ipc_trace.o\ndrivers/net/wwan/iosm/Makefile-29-\ndrivers/net/wwan/iosm/Makefile:30:obj-$(CONFIG_IOSM) := iosm.o\n--\ndrivers/net/wwan/iosm/iosm_ipc_chnl_cfg.c-7-\ndrivers/net/wwan/iosm/iosm_ipc_chnl_cfg.c:8:#include \"iosm_ipc_chnl_cfg.h\"\ndrivers/net/wwan/iosm/iosm_ipc_chnl_cfg.c-9-\n--\ndrivers/net/wwan/iosm/iosm_ipc_chnl_cfg.h-8-\ndrivers/net/wwan/iosm/iosm_ipc_chnl_cfg.h:9:#include \"iosm_ipc_mux.h\"\ndrivers/net/wwan/iosm/iosm_ipc_chnl_cfg.h-10-\n--\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c-6-\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c:7:#include \"iosm_ipc_coredump.h\"\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c-8-\n--\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c-17- */\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c:18:int ipc_coredump_collect(struct iosm_devlink *devlink, u8 **data, int entry,\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c-19-\t\t\t u32 region_size)\n--\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c-63- */\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c:64:int ipc_coredump_get_list(struct iosm_devlink *devlink, u16 cmd)\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c-65-{\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c-66-\tu32 byte_read, num_entries, file_size;\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c:67:\tstruct iosm_cd_table *cd_table;\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c-68-\tu8 size[MAX_SIZE_LEN], i;\n--\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-8-\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:9:#include \"iosm_ipc_devlink.h\"\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-10-\n--\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-20-/**\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:21: * struct iosm_cd_list_entry - Structure to hold coredump file info.\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-22- * @size: Number of bytes for the entry\n--\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-24- */\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:25:struct iosm_cd_list_entry {\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-26-\t__le32 size;\n--\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-30-/**\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:31: * struct iosm_cd_list - Structure to hold list of coredump files\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-32- * to be collected.\n--\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-35- */\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:36:struct iosm_cd_list {\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-37-\t__le32 num_entries;\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:38:\tstruct iosm_cd_list_entry entry[];\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-39-} __packed;\n--\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-41-/**\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:42: * struct iosm_cd_table - Common Coredump table\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-43- * @version: Version of coredump structure\n--\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-45- */\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:46:struct iosm_cd_table {\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-47-\t__le32 version;\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:48:\tstruct iosm_cd_list list;\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-49-} __packed;\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-50-\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:51:int ipc_coredump_collect(struct iosm_devlink *devlink, u8 **data, int entry,\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-52-\t\t\t u32 region_size);\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-53-\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:54:int ipc_coredump_get_list(struct iosm_devlink *devlink, u16 cmd);\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-55-\n--\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.c-8-\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.c:9:#include \"iosm_ipc_imem.h\"\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.c:10:#include \"iosm_ipc_trace.h\"\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.c:11:#include \"iosm_ipc_debugfs.h\"\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.c-12-\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.c:13:void ipc_debugfs_init(struct iosm_imem *ipc_imem)\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.c-14-{\n--\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.c-24-\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.c:25:void ipc_debugfs_deinit(struct iosm_imem *ipc_imem)\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.c-26-{\n--\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.h-9-#ifdef CONFIG_WWAN_DEBUGFS\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.h:10:void ipc_debugfs_init(struct iosm_imem *ipc_imem);\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.h:11:void ipc_debugfs_deinit(struct iosm_imem *ipc_imem);\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.h-12-#else\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.h:13:static inline void ipc_debugfs_init(struct iosm_imem *ipc_imem) {}\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.h:14:static inline void ipc_debugfs_deinit(struct iosm_imem *ipc_imem) {}\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.h-15-#endif\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-6-\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:7:#include \"iosm_ipc_chnl_cfg.h\"\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:8:#include \"iosm_ipc_coredump.h\"\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:9:#include \"iosm_ipc_devlink.h\"\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:10:#include \"iosm_ipc_flash.h\"\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-11-\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-12-/* Coredump list */\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:13:static struct iosm_coredump_file_info list[IOSM_NOF_CD_REGION] = {\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-14-\t{\"report.json\", REPORT_JSON_SIZE,},\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c=23=static int ipc_devlink_get_param(struct devlink *dl, u32 id,\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-26-{\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:27:\tstruct iosm_devlink *ipc_devlink = devlink_priv(dl);\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-28-\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c=36=static int ipc_devlink_set_param(struct devlink *dl, u32 id,\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-39-{\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:40:\tstruct iosm_devlink *ipc_devlink = devlink_priv(dl);\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-41-\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-48-/* Devlink param structure array */\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:49:static const struct devlink_param iosm_devlink_params[] = {\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-50-\tDEVLINK_PARAM_DRIVER(IOSM_DEVLINK_PARAM_ID_ERASE_FULL_FLASH,\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-57-/* Get devlink flash component type */\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:58:static enum iosm_flash_comp_type\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-59-ipc_devlink_get_flash_comp_type(const char comp_str[], u32 len)\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-60-{\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:61:\tenum iosm_flash_comp_type fls_type;\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-62-\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c=79=static int ipc_devlink_flash_update(struct devlink *devlink,\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-82-{\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:83:\tstruct iosm_devlink *ipc_devlink = devlink_priv(devlink);\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:84:\tenum iosm_flash_comp_type fls_type;\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:85:\tstruct iosm_devlink_image *header;\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-86-\tint rc = -EINVAL;\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-88-\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:89:\theader = (struct iosm_devlink_image *)params-\u003efw-\u003edata;\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-90-\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c=137=static const struct devlink_ops devlink_flash_ops = {\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-142- * ipc_devlink_send_cmd - Send command to Modem\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:143: * @ipc_devlink: Pointer to struct iosm_devlink\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-144- * @cmd: Command to be sent to modem\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-148- */\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:149:int ipc_devlink_send_cmd(struct iosm_devlink *ipc_devlink, u16 cmd, u32 entry)\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-150-{\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:151:\tstruct iosm_rpsi_cmd rpsi_cmd;\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-152-\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c=163=static int ipc_devlink_coredump_snapshot(struct devlink *dl,\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-167-{\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:168:\tstruct iosm_devlink *ipc_devlink = devlink_priv(dl);\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:169:\tstruct iosm_coredump_file_info *cd_list = ops-\u003epriv;\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-170-\tu32 region_size;\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-194-/* To create regions for coredump files */\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:195:static int ipc_devlink_create_region(struct iosm_devlink *devlink)\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-196-{\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-200-\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:201:\tmdm_coredump = devlink-\u003eiosm_devlink_mdm_coredump;\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-202-\tfor (i = 0; i \u003c IOSM_NOF_CD_REGION; i++) {\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-226-/* To Destroy devlink regions */\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:227:static void ipc_devlink_destroy_region(struct iosm_devlink *ipc_devlink)\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-228-{\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-236- * ipc_devlink_init - Initialize/register devlink to IOSM driver\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:237: * @ipc_imem: Pointer to struct iosm_imem\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-238- *\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:239: * Returns: Pointer to iosm_devlink on success and NULL on failure\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-240- */\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:241:struct iosm_devlink *ipc_devlink_init(struct iosm_imem *ipc_imem)\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-242-{\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-243-\tstruct ipc_chnl_cfg chnl_cfg_flash = { 0 };\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:244:\tstruct iosm_devlink *ipc_devlink;\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-245-\tstruct devlink *devlink_ctx;\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-248-\tdevlink_ctx = devlink_alloc(\u0026devlink_flash_ops,\n\n"
} |
| 5/2 | 2026/10/20 13:21 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 9784 output: 31 thoughts: 24 Thoughts: Here's a summary of my thought process: **Investigating CONFIG_IOSM** Okay, let's dive in. I need to figure out what `CONFIG_IOSM` is. Given my experience, I'm pretty sure it's related to the WWAN subsystem, so my first instinct is to check the `Kconfig` file within the `drivers/net/wwan/` directory. That's the logical place to start looking for definitions, dependencies, and any clues about what this configuration option controls. Hopefully, the Kconfig file will give me enough information. |
| 6/2 | 2026/10/20 13:21 | tool | grepper |
0mArgs:{
"Expression": "config IOSM",
"PathPrefixes": [
"drivers/net/wwan/"
]
}Results: {
"Output": "drivers/net/wwan/Kconfig=78=config RPMSG_WWAN_CTRL\n--\ndrivers/net/wwan/Kconfig-95-\ndrivers/net/wwan/Kconfig:96:config IOSM\ndrivers/net/wwan/Kconfig-97-\ttristate \"IOSM Driver for Intel M.2 WWAN Device\"\n"
} |
| 7/2 | 2026/10/20 13:21 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 10061 output: 36 thoughts: 21 Thoughts: Here's my attempt at summarizing the thought process, tailored for an expert audience: **Diving into the WWAN Driver Configuration** Okay, let's get down to brass tacks. I'm thinking we need to take a look at the `drivers/net/wwan/Kconfig` file. Specifically, I'm aiming for around line 96. I suspect there's a particular configuration option or block of logic in that area that's relevant to the current problem I'm trying to solve, or the feature I'm evaluating. My mental map of the WWAN driver subsystem is pretty solid, so I have a hunch about what I'll find there. This should hopefully be a quick navigation to the core of some related configuration that I need to analyze. Line 96, here I come. |
| 8/2 | 2026/10/20 13:21 | tool | read-file |
0mArgs:{
"File": "drivers/net/wwan/Kconfig",
"FirstLine": 90,
"LineCount": 35
}Results: {
"Contents": " 90:\t\t this driver but the QMI messages can only be sent through\n 91:\t\t QRTR network sockets (CONFIG_QRTR).\n 92:\t\n 93:\t\t To compile this driver as a module, choose M here: the module will be\n 94:\t\t called rpmsg_wwan_ctrl.\n 95:\t\n 96:\tconfig IOSM\n 97:\t\ttristate \"IOSM Driver for Intel M.2 WWAN Device\"\n 98:\t\tdepends on PCI\n 99:\t\tselect NET_DEVLINK\n 100:\t\tselect RELAY if WWAN_DEBUGFS\n 101:\t\thelp\n 102:\t\t This driver enables Intel M.2 WWAN Device communication.\n 103:\t\n 104:\t\t If you have one of those Intel M.2 WWAN Modules and wish to use it in\n 105:\t\t Linux say Y/M here.\n 106:\t\n 107:\t\t If unsure, say N.\n 108:\t\n 109:\tconfig MTK_T7XX\n 110:\t\ttristate \"MediaTek PCIe 5G WWAN modem T7xx device\"\n 111:\t\tdepends on PCI\n 112:\t\tselect RELAY if WWAN_DEBUGFS\n 113:\t\thelp\n 114:\t\t Enables MediaTek PCIe based 5G WWAN modem (T7xx series) device.\n 115:\t\t Adapts WWAN framework and provides network interface like wwan0\n 116:\t\t and tty interfaces like wwan0at0 (AT protocol), wwan0mbim0\n 117:\t\t (MBIM protocol), etc.\n 118:\t\n 119:\t\t To compile this driver as a module, choose M here: the module will be\n 120:\t\t called mtk_t7xx.\n 121:\t\n 122:\t\t If unsure, say N.\n 123:\t\n 124:\tendif # WWAN\n"
} |
| 9/2 | 2026/10/20 13:21 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 10813 output: 45 thoughts: 59 Thoughts: Okay, let's dive into this. Here's how I'd approach this, thinking aloud: **Inspecting the IOSM Driver for Intel M.2 WWAN Devices** Right, so `IOSM` – that's the "IOSM Driver for Intel M.2 WWAN Device," which, as a PCI device driver, immediately tells me it's going to be talking directly to hardware. Given my background in kernel drivers, I need to understand its scope. My first instinct, looking at the name, is to figure out the PCI device IDs it's designed to handle. That's the key to understanding its intended targets. Therefore, I'm heading straight for `drivers/net/wwan/iosm/iosm_ipc_pcie.c`. That file name strongly suggests it handles the PCIe communication path for the driver. Knowing the specific IDs it recognizes is crucial for understanding its intended scope and supported devices. It’s the entry point to discover which Intel M.2 WWAN devices this driver is actually meant to work with. I need to see what hardware this driver is going to bind with. |
| 10/2 | 2026/10/20 13:21 | tool | read-file |
0mArgs:{
"File": "drivers/net/wwan/iosm/iosm_ipc_pcie.c",
"FirstLine": 1,
"LineCount": 80
}Results: {
"Contents": " 1:\t// SPDX-License-Identifier: GPL-2.0-only\n 2:\t/*\n 3:\t * Copyright (C) 2020-21 Intel Corporation.\n 4:\t */\n 5:\t\n 6:\t#include \u003clinux/acpi.h\u003e\n 7:\t#include \u003clinux/bitfield.h\u003e\n 8:\t#include \u003clinux/module.h\u003e\n 9:\t#include \u003clinux/suspend.h\u003e\n 10:\t#include \u003cnet/rtnetlink.h\u003e\n 11:\t\n 12:\t#include \"iosm_ipc_imem.h\"\n 13:\t#include \"iosm_ipc_pcie.h\"\n 14:\t#include \"iosm_ipc_protocol.h\"\n 15:\t\n 16:\tMODULE_DESCRIPTION(\"IOSM Driver\");\n 17:\tMODULE_LICENSE(\"GPL v2\");\n 18:\t\n 19:\t/* WWAN GUID */\n 20:\tstatic guid_t wwan_acpi_guid = GUID_INIT(0xbad01b75, 0x22a8, 0x4f48, 0x87, 0x92,\n 21:\t\t\t\t\t 0xbd, 0xde, 0x94, 0x67, 0x74, 0x7d);\n 22:\tstatic bool pci_registered;\n 23:\t\n 24:\tstatic void ipc_pcie_resources_release(struct iosm_pcie *ipc_pcie)\n 25:\t{\n 26:\t\t/* Free the MSI resources. */\n 27:\t\tipc_release_irq(ipc_pcie);\n 28:\t\n 29:\t\t/* Free mapped doorbell scratchpad bus memory into CPU space. */\n 30:\t\tiounmap(ipc_pcie-\u003escratchpad);\n 31:\t\n 32:\t\t/* Free mapped IPC_REGS bus memory into CPU space. */\n 33:\t\tiounmap(ipc_pcie-\u003eipc_regs);\n 34:\t\n 35:\t\t/* Releases all PCI I/O and memory resources previously reserved by a\n 36:\t\t * successful call to pci_request_regions. Call this function only\n 37:\t\t * after all use of the PCI regions has ceased.\n 38:\t\t */\n 39:\t\tpci_release_regions(ipc_pcie-\u003epci);\n 40:\t}\n 41:\t\n 42:\tstatic void ipc_pcie_cleanup(struct iosm_pcie *ipc_pcie)\n 43:\t{\n 44:\t\t/* Free the shared memory resources. */\n 45:\t\tipc_imem_cleanup(ipc_pcie-\u003eimem);\n 46:\t\n 47:\t\tipc_pcie_resources_release(ipc_pcie);\n 48:\t\n 49:\t\t/* Signal to the system that the PCI device is not in use. */\n 50:\t\tpci_disable_device(ipc_pcie-\u003epci);\n 51:\t}\n 52:\t\n 53:\tstatic void ipc_pcie_deinit(struct iosm_pcie *ipc_pcie)\n 54:\t{\n 55:\t\tkfree(ipc_pcie-\u003eimem);\n 56:\t\tkfree(ipc_pcie);\n 57:\t}\n 58:\t\n 59:\tstatic void ipc_pcie_remove(struct pci_dev *pci)\n 60:\t{\n 61:\t\tstruct iosm_pcie *ipc_pcie = pci_get_drvdata(pci);\n 62:\t\n 63:\t\tipc_pcie_cleanup(ipc_pcie);\n 64:\t\n 65:\t\tipc_pcie_deinit(ipc_pcie);\n 66:\t}\n 67:\t\n 68:\tstatic int ipc_pcie_resources_request(struct iosm_pcie *ipc_pcie)\n 69:\t{\n 70:\t\tstruct pci_dev *pci = ipc_pcie-\u003epci;\n 71:\t\tu32 cap = 0;\n 72:\t\tint ret;\n 73:\t\n 74:\t\t/* Reserved PCI I/O and memory resources.\n 75:\t\t * Mark all PCI regions associated with PCI device pci as\n 76:\t\t * being reserved by owner IOSM_IPC.\n 77:\t\t */\n 78:\t\tret = pci_request_regions(pci, \"IOSM_IPC\");\n 79:\t\tif (ret) {\n 80:\t\t\tdev_err(ipc_pcie-\u003edev, \"failed pci request regions\");\n"
} |
| 11/2 | 2026/10/20 13:21 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 12355 output: 37 thoughts: 25 Thoughts: Okay, let's dive into this. Here's how I'd approach this task, as if these were my internal thoughts: **Analyzing the `pci_device_id` Table in `iosm_ipc_pcie.c`** Alright, time to get my hands dirty. I need to understand the device identification setup within `iosm_ipc_pcie.c`. Specifically, I want to zero in on the `pci_device_id` table. This table, as I understand it, is critical for defining which PCI devices this module is designed to interact with. It's the gatekeeper, the configuration for the driver, telling it what hardware to pay attention to. I'll be looking for entries – vendor IDs, device IDs, subsystem vendor IDs, subsystem device IDs, and potentially class codes – to pinpoint the specific devices or classes of devices supported. I'll need to understand the structure of the table, how these IDs are used for matching against detected hardware, and if there are any special handling mechanisms within the table entries, such as quirks or platform-specific data. It is going to tell me precisely how this driver is designed to interact with various PCI devices and configurations. |
| 12/2 | 2026/10/20 13:21 | tool | grepper |
0mArgs:{
"Expression": "pci_device_id",
"PathPrefixes": [
"drivers/net/wwan/iosm/"
]
}Results: {
"Output": "drivers/net/wwan/iosm/iosm_ipc_imem.c=1334=struct iosm_imem *ipc_imem_init(struct iosm_pcie *pcie, unsigned int device_id,\n--\ndrivers/net/wwan/iosm/iosm_ipc_imem.c-1346-\ndrivers/net/wwan/iosm/iosm_ipc_imem.c:1347:\tipc_imem-\u003epci_device_id = device_id;\ndrivers/net/wwan/iosm/iosm_ipc_imem.c-1348-\n--\ndrivers/net/wwan/iosm/iosm_ipc_imem.h=273=enum ipc_phase {\n--\ndrivers/net/wwan/iosm/iosm_ipc_imem.h-317- * @phase:\t\t\tOperating phase like runtime.\ndrivers/net/wwan/iosm/iosm_ipc_imem.h:318: * @pci_device_id:\t\tDevice ID\ndrivers/net/wwan/iosm/iosm_ipc_imem.h-319- * @cp_version:\t\t\tCP version\n--\ndrivers/net/wwan/iosm/iosm_ipc_imem.h=334=struct iosm_imem {\n--\ndrivers/net/wwan/iosm/iosm_ipc_imem.h-363-\tenum ipc_phase phase;\ndrivers/net/wwan/iosm/iosm_ipc_imem.h:364:\tu16 pci_device_id;\ndrivers/net/wwan/iosm/iosm_ipc_imem.h-365-\tint cp_version;\n--\ndrivers/net/wwan/iosm/iosm_ipc_pcie.c=260=static int ipc_pcie_probe(struct pci_dev *pci,\ndrivers/net/wwan/iosm/iosm_ipc_pcie.c:261:\t\t\t const struct pci_device_id *pci_id)\ndrivers/net/wwan/iosm/iosm_ipc_pcie.c-262-{\n--\ndrivers/net/wwan/iosm/iosm_ipc_pcie.c-335-\ndrivers/net/wwan/iosm/iosm_ipc_pcie.c:336:static const struct pci_device_id iosm_ipc_ids[] = {\ndrivers/net/wwan/iosm/iosm_ipc_pcie.c-337-\t{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, INTEL_CP_DEVICE_7560_ID) },\n"
} |
| 13/2 | 2026/10/20 13:21 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 13347 output: 47 thoughts: 34 Thoughts: Okay, let's dive into this. Here's how I'd approach this task, as if these were my internal thoughts: **Analyzing `iosm_ipc_ids` in `drivers/net/wwan/iosm/iosm_ipc_pcie.c`** Alright, time to get to the heart of the matter. I need to take a look at the `iosm_ipc_ids` data structure. It's in `drivers/net/wwan/iosm/iosm_ipc_pcie.c`. This suggests we're dealing with the Inter-Process Communication (IPC) mechanism for the iOSM (likely Intel On-System Management) within the WWAN (Wireless Wide Area Network) subsystem, specifically related to the PCIe interface. Given the context, `iosm_ipc_ids` likely defines the identifiers used for communication between different processes or modules interacting through PCIe within this particular environment. I'll need to examine it carefully. I'll be looking for details on what these IDs represent – are they function codes, channel numbers, message types, or something else entirely? The types and definitions of these IDs will likely provide critical insights into the communication protocol. I want to understand how this system uses these identifiers to manage and route messages over the PCIe bus. Let's see what we can find! |
| 14/2 | 2026/10/20 13:21 | tool | read-file |
0mArgs:{
"File": "drivers/net/wwan/iosm/iosm_ipc_pcie.c",
"FirstLine": 330,
"LineCount": 30
}Results: {
"Contents": " 330:\tpci_enable_fail:\n 331:\t\tkfree(ipc_pcie);\n 332:\tret_fail:\n 333:\t\treturn -EIO;\n 334:\t}\n 335:\t\n 336:\tstatic const struct pci_device_id iosm_ipc_ids[] = {\n 337:\t\t{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, INTEL_CP_DEVICE_7560_ID) },\n 338:\t\t{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, INTEL_CP_DEVICE_7360_ID) },\n 339:\t\t{}\n 340:\t};\n 341:\tMODULE_DEVICE_TABLE(pci, iosm_ipc_ids);\n 342:\t\n 343:\t/* Enter sleep in s2idle case\n 344:\t */\n 345:\tstatic int __maybe_unused ipc_pcie_suspend_s2idle(struct iosm_pcie *ipc_pcie)\n 346:\t{\n 347:\t\tipc_cp_irq_sleep_control(ipc_pcie, IPC_MEM_DEV_PM_FORCE_SLEEP);\n 348:\t\n 349:\t\t/* Complete all memory stores before setting bit */\n 350:\t\tsmp_mb__before_atomic();\n 351:\t\n 352:\t\tset_bit(0, \u0026ipc_pcie-\u003esuspend);\n 353:\t\n 354:\t\t/* Complete all memory stores after setting bit */\n 355:\t\tsmp_mb__after_atomic();\n 356:\t\n 357:\t\tipc_imem_pm_s2idle_sleep(ipc_pcie-\u003eimem, true);\n 358:\t\n 359:\t\treturn 0;\n"
} |
| 15/2 | 2026/10/20 13:21 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 14200 output: 23 thoughts: 341 Thoughts: **Analyzing the WorthFuzzing Criteria for IOSM** Okay, let's zero in on Section 2 of the prompt. It details the *negative* criteria for `WorthFuzzing=false`. Specifically, it mentions "Structurally unreachable hardware," including vendor-specific PCIe switches and drivers that aren't emulated in standard QEMU. Also, Section 3 describes *positive* criteria, where `WorthFuzzing=true` is returned when executable code is touched, including those in reachable drivers. My immediate question: Is the IOSM device a physical PCI device? We're talking about the Intel M.2 WWAN Device – specifically the INTEL_CP_DEVICE_7560_ID and INTEL_CP_DEVICE_7360_ID, which are Intel XMM 7360 / 7560 LTE modems. Can QEMU emulate the Intel XMM 7360 / 7560 WWAN modem? The answer is likely no, and that is what I am checking right now. So, if it *isn't* emulated, is there *any* virtual bus or software emulation layer for iosm? I need to ascertain if this device has a virtual interface, or if it is inherently tied to physical hardware. I need to know if the driver is accessible without the physical hardware. Time to search for any platform driver or test mock for iosm. That should give me the answer. |
| 16/2 | 2026/10/20 13:22 | tool | grepper |
0mArgs:{
"Expression": "ipc_protocol_free_msg_get"
}Results: {
"Output": "drivers/net/wwan/iosm/iosm_ipc_protocol_ops.c=10=static union ipc_mem_msg_entry *\ndrivers/net/wwan/iosm/iosm_ipc_protocol_ops.c:11:ipc_protocol_free_msg_get(struct iosm_protocol *ipc_protocol, int *index)\ndrivers/net/wwan/iosm/iosm_ipc_protocol_ops.c-12-{\n--\ndrivers/net/wwan/iosm/iosm_ipc_protocol_ops.c=58=static int ipc_protocol_msg_prepipe_open(struct iosm_protocol *ipc_protocol,\n--\ndrivers/net/wwan/iosm/iosm_ipc_protocol_ops.c-62-\tunion ipc_mem_msg_entry *msg =\ndrivers/net/wwan/iosm/iosm_ipc_protocol_ops.c:63:\t\tipc_protocol_free_msg_get(ipc_protocol, \u0026index);\ndrivers/net/wwan/iosm/iosm_ipc_protocol_ops.c-64-\tstruct ipc_pipe *pipe = args-\u003epipe_open.pipe;\n--\ndrivers/net/wwan/iosm/iosm_ipc_protocol_ops.c=110=static int ipc_protocol_msg_prepipe_close(struct iosm_protocol *ipc_protocol,\n--\ndrivers/net/wwan/iosm/iosm_ipc_protocol_ops.c-114-\tunion ipc_mem_msg_entry *msg =\ndrivers/net/wwan/iosm/iosm_ipc_protocol_ops.c:115:\t\tipc_protocol_free_msg_get(ipc_protocol, \u0026index);\ndrivers/net/wwan/iosm/iosm_ipc_protocol_ops.c-116-\tstruct ipc_pipe *pipe = args-\u003epipe_close.pipe;\n--\ndrivers/net/wwan/iosm/iosm_ipc_protocol_ops.c=130=static int ipc_protocol_msg_prep_sleep(struct iosm_protocol *ipc_protocol,\n--\ndrivers/net/wwan/iosm/iosm_ipc_protocol_ops.c-134-\tunion ipc_mem_msg_entry *msg =\ndrivers/net/wwan/iosm/iosm_ipc_protocol_ops.c:135:\t\tipc_protocol_free_msg_get(ipc_protocol, \u0026index);\ndrivers/net/wwan/iosm/iosm_ipc_protocol_ops.c-136-\n--\ndrivers/net/wwan/iosm/iosm_ipc_protocol_ops.c=155=static int ipc_protocol_msg_prep_feature_set(struct iosm_protocol *ipc_protocol,\n--\ndrivers/net/wwan/iosm/iosm_ipc_protocol_ops.c-159-\tunion ipc_mem_msg_entry *msg =\ndrivers/net/wwan/iosm/iosm_ipc_protocol_ops.c:160:\t\tipc_protocol_free_msg_get(ipc_protocol, \u0026index);\ndrivers/net/wwan/iosm/iosm_ipc_protocol_ops.c-161-\n"
} |
| 17/2 | 2026/10/20 13:22 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 15672 output: 44 thoughts: 40 Thoughts: Okay, let's dive into this. Here's my thought process on this piece of code: **Analyzing iOSM Initialization and PCIe Probing** Alright, I need to understand how the iOSM driver gets its legs under it, specifically focusing on its initialization process. My primary question right now is whether it solely relies on PCI for device discovery. To get a handle on this, I need to examine the initialization code and identify the PCI-specific probing mechanism. I'll start by checking the `iosm_ipc_pcie.c` file within the WWAN drivers directory. I will look for how the device is registered with the kernel, particularly anything related to PCI device IDs or specific PCI probe functions. This should give me a clear picture of its initialization strategy and confirm whether it uses the PCI bus exclusively, or perhaps if other mechanisms are involved. |
| 18/2 | 2026/10/20 13:22 | tool | grepper |
0mArgs:{
"Expression": "module_pci_driver|pci_register_driver",
"PathPrefixes": [
"drivers/net/wwan/iosm/"
]
}Results: {
"Output": "drivers/net/wwan/iosm/iosm_ipc_pcie.c=535=static int pm_notify(struct notifier_block *nb, unsigned long mode, void *_unused)\n--\ndrivers/net/wwan/iosm/iosm_ipc_pcie.c-545-\ndrivers/net/wwan/iosm/iosm_ipc_pcie.c:546:\t\t\tret = pci_register_driver(\u0026iosm_ipc_driver);\ndrivers/net/wwan/iosm/iosm_ipc_pcie.c-547-\t\t\tif (ret) {\n--\ndrivers/net/wwan/iosm/iosm_ipc_pcie.c=563=static int __init iosm_ipc_driver_init(void)\n--\ndrivers/net/wwan/iosm/iosm_ipc_pcie.c-566-\ndrivers/net/wwan/iosm/iosm_ipc_pcie.c:567:\tret = pci_register_driver(\u0026iosm_ipc_driver);\ndrivers/net/wwan/iosm/iosm_ipc_pcie.c-568-\tif (ret)\n"
} |
| 19/2 | 2026/10/20 13:22 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 16233 output: 47 thoughts: 35 Thoughts: Okay, here's my interpretation of those thoughts, tailored for an expert audience, presented in the first person: **Kernel Module Initialization and PCI Driver Registration** Right, so `iosm` is registering the `iosm_ipc_driver` with the PCI subsystem using `pci_register_driver`. That's standard practice for a PCI device driver, of course. My first thought is always to verify that it's done correctly and consider any potential for race conditions or initialization order issues. I'd need to confirm the device ID tables and probe callback are correct. Now, let's dive into the `ipc_pcie_probe` function to see exactly what's happening during device enumeration and initialization. I need to understand how the driver handles device attachment, resource allocation (like BARs), interrupt setup, and any platform-specific quirks or workarounds required for this specific hardware. We'll examine that function call next. |
| 20/2 | 2026/10/20 13:22 | tool | read-file |
0mArgs:{
"File": "drivers/net/wwan/iosm/iosm_ipc_pcie.c",
"FirstLine": 260,
"LineCount": 75
}Results: {
"Contents": " 260:\tstatic int ipc_pcie_probe(struct pci_dev *pci,\n 261:\t\t\t\t const struct pci_device_id *pci_id)\n 262:\t{\n 263:\t\tstruct iosm_pcie *ipc_pcie = kzalloc_obj(*ipc_pcie);\n 264:\t\tint ret;\n 265:\t\n 266:\t\tpr_debug(\"Probing device 0x%X from the vendor 0x%X\", pci_id-\u003edevice,\n 267:\t\t\t pci_id-\u003evendor);\n 268:\t\n 269:\t\tif (!ipc_pcie)\n 270:\t\t\tgoto ret_fail;\n 271:\t\n 272:\t\t/* Initialize ipc dbg component for the PCIe device */\n 273:\t\tipc_pcie-\u003edev = \u0026pci-\u003edev;\n 274:\t\n 275:\t\t/* Set the driver specific data. */\n 276:\t\tpci_set_drvdata(pci, ipc_pcie);\n 277:\t\n 278:\t\t/* Save the address of the PCI device configuration. */\n 279:\t\tipc_pcie-\u003epci = pci;\n 280:\t\n 281:\t\t/* Update platform configuration */\n 282:\t\tipc_pcie_config_init(ipc_pcie);\n 283:\t\n 284:\t\t/* Initialize the device before it is used. Ask low-level code\n 285:\t\t * to enable I/O and memory. Wake up the device if it was suspended.\n 286:\t\t */\n 287:\t\tif (pci_enable_device(pci)) {\n 288:\t\t\tdev_err(ipc_pcie-\u003edev, \"failed to enable the AP PCIe device\");\n 289:\t\t\t/* If enable of PCIe device has failed then calling\n 290:\t\t\t * ipc_pcie_cleanup will panic the system. More over\n 291:\t\t\t * ipc_pcie_cleanup() is required to be called after\n 292:\t\t\t * ipc_imem_mount()\n 293:\t\t\t */\n 294:\t\t\tgoto pci_enable_fail;\n 295:\t\t}\n 296:\t\n 297:\t\tret = dma_set_mask(ipc_pcie-\u003edev, DMA_BIT_MASK(64));\n 298:\t\tif (ret) {\n 299:\t\t\tdev_err(ipc_pcie-\u003edev, \"Could not set PCI DMA mask: %d\", ret);\n 300:\t\t\tgoto set_mask_fail;\n 301:\t\t}\n 302:\t\n 303:\t\tipc_pcie_config_aspm(ipc_pcie);\n 304:\t\tdev_dbg(ipc_pcie-\u003edev, \"PCIe device enabled.\");\n 305:\t\n 306:\t\t/* Read WWAN RTD3 BIOS Setting\n 307:\t\t */\n 308:\t\tipc_pcie-\u003ed3l2_support = ipc_pcie_read_bios_cfg(\u0026pci-\u003edev);\n 309:\t\n 310:\t\tipc_pcie-\u003esuspend = 0;\n 311:\t\n 312:\t\tif (ipc_pcie_resources_request(ipc_pcie))\n 313:\t\t\tgoto resources_req_fail;\n 314:\t\n 315:\t\t/* Establish the link to the imem layer. */\n 316:\t\tipc_pcie-\u003eimem = ipc_imem_init(ipc_pcie, pci-\u003edevice,\n 317:\t\t\t\t\t ipc_pcie-\u003escratchpad, ipc_pcie-\u003edev);\n 318:\t\tif (!ipc_pcie-\u003eimem) {\n 319:\t\t\tdev_err(ipc_pcie-\u003edev, \"failed to init imem\");\n 320:\t\t\tgoto imem_init_fail;\n 321:\t\t}\n 322:\t\n 323:\t\treturn 0;\n 324:\t\n 325:\timem_init_fail:\n 326:\t\tipc_pcie_resources_release(ipc_pcie);\n 327:\tresources_req_fail:\n 328:\tset_mask_fail:\n 329:\t\tpci_disable_device(pci);\n 330:\tpci_enable_fail:\n 331:\t\tkfree(ipc_pcie);\n 332:\tret_fail:\n 333:\t\treturn -EIO;\n 334:\t}\n"
} |
| 21/2 | 2026/10/20 13:22 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 17695 output: 23 thoughts: 328 Thoughts: **Analyzing the Feasibility of Fuzzing the `iosm` Driver** Okay, so `iosm` is that Intel PCIe M.2 WWAN device driver. The crucial thing is that it only activates when it sees a physical PCI device with Intel's vendor and device ID, either 0x7560 or 0x7360, right? Immediately, the question is, can we *emulate* that? Standard QEMU or Google Compute Engine instances aren't set up to do that; they don't model those specific Intel XMM 7360/7560 modems on the PCIe bus. That kills the obvious path. Alright, let's circle back to the negative criteria. Specifically, the "Structurally unreachable hardware" clause. It says *not* to fuzz drivers that require physical ASICs or PCIe cards not emulated in standard QEMU. Things like vendor-specific PCIe switches, SmartNICs, GPU drivers – the usual suspects. This sounds *exactly* like what we're facing. This `iosm` driver seems to fall squarely into that category. But wait, what about syzkaller? Does syzkaller even touch WWAN or `iosm` drivers? I need to check. Let's see if syzkaller has any dedicated WWAN descriptions or if there is even a virtual WWAN device described anywhere. The WWAN core framework (`drivers/net/wwan/wwan_core.c`) is interesting. Some drivers *use* that. It has some abstractions. Is there a virtual device or a dummy device in WWAN core? Let's check if the WWAN core includes a dummy/test driver. |
| 22/2 | 2026/10/20 13:22 | tool | grepper |
0mError:missing argument "Expression" Args: {
"PathPrefixes": [
"drivers/net/wwan/"
]
}Results: {
"error": "missing argument \"Expression\""
} |
| 23/2 | 2026/10/20 13:22 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 18424 output: 24 thoughts: 15 Thoughts: Here's my take on those thoughts: **Exploring WWAN Driver Files** Alright, let's get down to brass tacks. I need to take a look at the files residing within the `drivers/net/wwan/` directory. This is where the core of my WWAN network interface knowledgebase is likely concentrated. I anticipate finding the usual suspects – device drivers, connection management components, and interface definitions. My primary goal here is to determine how the current configuration is interacting with the rest of the system, and what specific files are being used and modified. The goal is likely to begin work on those or find relevant information. I should be able to get this done in short order. |
| 24/2 | 2026/10/20 13:22 | tool | codesearch-dir-index |
0mArgs:{
"Dir": "drivers/net/wwan"
}Results: {
"Files": [
"mhi_wwan_ctrl.c",
"mhi_wwan_mbim.c",
"qcom_bam_dmux.c",
"rpmsg_wwan_ctrl.c",
"wwan_core.c",
"wwan_hwsim.c"
],
"Subdirs": [
"iosm",
"t7xx"
]
} |
| 25/2 | 2026/10/20 13:22 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 18703 output: 40 thoughts: 64 Thoughts: **Initial Assessment of wwan_hwsim.c** Alright, let's see... *wwan_hwsim.c*! That's interesting. I hadn't realized there was a hardware simulator dedicated to WWAN devices. My immediate question is, what's its approach? Does it model the IOSM layer directly, or does it leverage `wwan_core` to simulate a WWAN device itself? That's the crucial distinction for its usefulness in testing. Right, time to dive into the code and find out exactly what it's doing. |
| 26/2 | 2026/10/20 13:22 | tool | read-file |
0mArgs:{
"File": "drivers/net/wwan/wwan_hwsim.c",
"FirstLine": 1,
"LineCount": 60
}Results: {
"Contents": " 1:\t// SPDX-License-Identifier: GPL-2.0-only\n 2:\t/*\n 3:\t * WWAN device simulator for WWAN framework testing.\n 4:\t *\n 5:\t * Copyright (c) 2021, 2025, Sergey Ryazanov \u003cryazanov.s.a@gmail.com\u003e\n 6:\t */\n 7:\t\n 8:\t#define pr_fmt(fmt) KBUILD_MODNAME \": \" fmt\n 9:\t\n 10:\t#include \u003clinux/kernel.h\u003e\n 11:\t#include \u003clinux/module.h\u003e\n 12:\t#include \u003clinux/slab.h\u003e\n 13:\t#include \u003clinux/device.h\u003e\n 14:\t#include \u003clinux/spinlock.h\u003e\n 15:\t#include \u003clinux/time.h\u003e\n 16:\t#include \u003clinux/list.h\u003e\n 17:\t#include \u003clinux/skbuff.h\u003e\n 18:\t#include \u003clinux/timer.h\u003e\n 19:\t#include \u003clinux/netdevice.h\u003e\n 20:\t#include \u003clinux/wwan.h\u003e\n 21:\t#include \u003clinux/debugfs.h\u003e\n 22:\t#include \u003clinux/workqueue.h\u003e\n 23:\t\n 24:\t#include \u003cnet/arp.h\u003e\n 25:\t\n 26:\tstatic int wwan_hwsim_devsnum = 2;\n 27:\tmodule_param_named(devices, wwan_hwsim_devsnum, int, 0444);\n 28:\tMODULE_PARM_DESC(devices, \"Number of simulated devices\");\n 29:\t\n 30:\tstatic const struct class wwan_hwsim_class = {\n 31:\t\t.name = \"wwan_hwsim\",\n 32:\t};\n 33:\t\n 34:\tstatic struct dentry *wwan_hwsim_debugfs_topdir;\n 35:\tstatic struct dentry *wwan_hwsim_debugfs_devcreate;\n 36:\t\n 37:\tstatic DEFINE_SPINLOCK(wwan_hwsim_devs_lock);\n 38:\tstatic LIST_HEAD(wwan_hwsim_devs);\n 39:\tstatic unsigned int wwan_hwsim_dev_idx;\n 40:\tstatic struct workqueue_struct *wwan_wq;\n 41:\t\n 42:\tstruct wwan_hwsim_dev {\n 43:\t\tstruct list_head list;\n 44:\t\tunsigned int id;\n 45:\t\tstruct device dev;\n 46:\t\tstruct work_struct del_work;\n 47:\t\tstruct dentry *debugfs_topdir;\n 48:\t\tstruct dentry *debugfs_portcreate;\n 49:\t\tspinlock_t ports_lock;\t/* Serialize ports creation/deletion */\n 50:\t\tunsigned int port_idx;\n 51:\t\tstruct list_head ports;\n 52:\t};\n 53:\t\n 54:\tstruct wwan_hwsim_port {\n 55:\t\tstruct list_head list;\n 56:\t\tunsigned int id;\n 57:\t\tstruct wwan_hwsim_dev *dev;\n 58:\t\tstruct wwan_port *wwan;\n 59:\t\tstruct work_struct del_work;\n 60:\t\tstruct dentry *debugfs_topdir;\n"
} |
| 27/2 | 2026/10/20 13:22 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 19808 output: 27 thoughts: 66 Thoughts: Here's my understanding, as if I were thinking it: **Focusing on WWAN Simulation and iosm** Alright, so `wwan_hwsim` is solely for testing the WWAN framework, using `wwan_core.c` as its base. It's essentially a generic WWAN simulator, nothing more, and importantly, has absolutely no connection to `iosm`. My immediate thought is, "Okay, that's clear enough, but just to be completely sure, let's double-check." I need to make *absolutely* sure that `iosm` isn't lurking around unexpectedly. I'll need to verify that `iosm` is only ever touched within the `drivers/net/wwan/iosm/` directory. No accidental dependencies or unintended code reuse – that's what I'm looking for. |
| 28/2 | 2026/10/20 13:22 | tool | grepper |
0mArgs:{
"Expression": "iosm",
"PathPrefixes": [
"drivers/net/"
]
}Results: {
"Output": "\nFull output is too long, showing 200 out of 2552 lines.\nUse more precise expression or PathPrefixes if possible.\n\nNumber of matching lines per file (41 files in total):\ndrivers/net/wwan/Makefile:1\ndrivers/net/wwan/iosm/Makefile:23\ndrivers/net/wwan/iosm/iosm_ipc_chnl_cfg.c:1\ndrivers/net/wwan/iosm/iosm_ipc_chnl_cfg.h:1\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c:4\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:11\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.c:5\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.h:4\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:35\ndrivers/net/wwan/iosm/iosm_ipc_devlink.h:37\ndrivers/net/wwan/iosm/iosm_ipc_flash.c:27\ndrivers/net/wwan/iosm/iosm_ipc_flash.h:29\ndrivers/net/wwan/iosm/iosm_ipc_imem.c:67\ndrivers/net/wwan/iosm/iosm_ipc_imem.h:38\ndrivers/net/wwan/iosm/iosm_ipc_imem_ops.c:27\ndrivers/net/wwan/iosm/iosm_ipc_imem_ops.h:16\ndrivers/net/wwan/iosm/iosm_ipc_irq.c:7\ndrivers/net/wwan/iosm/iosm_ipc_irq.h:7\ndrivers/net/wwan/iosm/iosm_ipc_mmio.c:13\ndrivers/net/wwan/iosm/iosm_ipc_mmio.h:12\ndrivers/net/wwan/iosm/iosm_ipc_mux.c:20\ndrivers/net/wwan/iosm/iosm_ipc_mux.h:20\ndrivers/net/wwan/iosm/iosm_ipc_mux_codec.c:45\ndrivers/net/wwan/iosm/iosm_ipc_mux_codec.h:8\ndrivers/net/wwan/iosm/iosm_ipc_pcie.c:39\ndrivers/net/wwan/iosm/iosm_ipc_pcie.h:24\ndrivers/net/wwan/iosm/iosm_ipc_pm.c:16\ndrivers/net/wwan/iosm/iosm_ipc_pm.h:15\ndrivers/net/wwan/iosm/iosm_ipc_port.c:12\ndrivers/net/wwan/iosm/iosm_ipc_port.h:10\ndrivers/net/wwan/iosm/iosm_ipc_protocol.c:22\ndrivers/net/wwan/iosm/iosm_ipc_protocol.h:22\ndrivers/net/wwan/iosm/iosm_ipc_protocol_ops.c:22\ndrivers/net/wwan/iosm/iosm_ipc_protocol_ops.h:24\ndrivers/net/wwan/iosm/iosm_ipc_task_queue.c:6\ndrivers/net/wwan/iosm/iosm_ipc_task_queue.h:6\ndrivers/net/wwan/iosm/iosm_ipc_trace.c:11\ndrivers/net/wwan/iosm/iosm_ipc_trace.h:11\ndrivers/net/wwan/iosm/iosm_ipc_uevent.c:1\ndrivers/net/wwan/iosm/iosm_ipc_wwan.c:41\ndrivers/net/wwan/iosm/iosm_ipc_wwan.h:4\n\ndrivers/net/wwan/Makefile=14=obj-$(CONFIG_RPMSG_WWAN_CTRL) += rpmsg_wwan_ctrl.o\ndrivers/net/wwan/Makefile:15:obj-$(CONFIG_IOSM) += iosm/\ndrivers/net/wwan/Makefile-16-obj-$(CONFIG_MTK_T7XX) += t7xx/\n--\ndrivers/net/wwan/iosm/Makefile-5-\ndrivers/net/wwan/iosm/Makefile:6:iosm-y = \\\ndrivers/net/wwan/iosm/Makefile:7:\tiosm_ipc_task_queue.o\t\\\ndrivers/net/wwan/iosm/Makefile:8:\tiosm_ipc_imem.o\t\t\t\\\ndrivers/net/wwan/iosm/Makefile:9:\tiosm_ipc_imem_ops.o\t\t\\\ndrivers/net/wwan/iosm/Makefile:10:\tiosm_ipc_mmio.o\t\t\t\\\ndrivers/net/wwan/iosm/Makefile:11:\tiosm_ipc_port.o\t\t\t\\\ndrivers/net/wwan/iosm/Makefile:12:\tiosm_ipc_wwan.o\t\t\t\\\ndrivers/net/wwan/iosm/Makefile:13:\tiosm_ipc_uevent.o\t\t\\\ndrivers/net/wwan/iosm/Makefile:14:\tiosm_ipc_pm.o\t\t\t\\\ndrivers/net/wwan/iosm/Makefile:15:\tiosm_ipc_pcie.o\t\t\t\\\ndrivers/net/wwan/iosm/Makefile:16:\tiosm_ipc_irq.o\t\t\t\\\ndrivers/net/wwan/iosm/Makefile:17:\tiosm_ipc_chnl_cfg.o\t\t\\\ndrivers/net/wwan/iosm/Makefile:18:\tiosm_ipc_protocol.o\t\t\\\ndrivers/net/wwan/iosm/Makefile:19:\tiosm_ipc_protocol_ops.o\t\\\ndrivers/net/wwan/iosm/Makefile:20:\tiosm_ipc_mux.o\t\t\t\\\ndrivers/net/wwan/iosm/Makefile:21:\tiosm_ipc_mux_codec.o\t\t\\\ndrivers/net/wwan/iosm/Makefile:22:\tiosm_ipc_devlink.o\t\t\\\ndrivers/net/wwan/iosm/Makefile:23:\tiosm_ipc_flash.o\t\t\\\ndrivers/net/wwan/iosm/Makefile:24:\tiosm_ipc_coredump.o\ndrivers/net/wwan/iosm/Makefile-25-\ndrivers/net/wwan/iosm/Makefile:26:iosm-$(CONFIG_WWAN_DEBUGFS) += \\\ndrivers/net/wwan/iosm/Makefile:27:\tiosm_ipc_debugfs.o\t\t\\\ndrivers/net/wwan/iosm/Makefile:28:\tiosm_ipc_trace.o\ndrivers/net/wwan/iosm/Makefile-29-\ndrivers/net/wwan/iosm/Makefile:30:obj-$(CONFIG_IOSM) := iosm.o\n--\ndrivers/net/wwan/iosm/iosm_ipc_chnl_cfg.c-7-\ndrivers/net/wwan/iosm/iosm_ipc_chnl_cfg.c:8:#include \"iosm_ipc_chnl_cfg.h\"\ndrivers/net/wwan/iosm/iosm_ipc_chnl_cfg.c-9-\n--\ndrivers/net/wwan/iosm/iosm_ipc_chnl_cfg.h-8-\ndrivers/net/wwan/iosm/iosm_ipc_chnl_cfg.h:9:#include \"iosm_ipc_mux.h\"\ndrivers/net/wwan/iosm/iosm_ipc_chnl_cfg.h-10-\n--\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c-6-\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c:7:#include \"iosm_ipc_coredump.h\"\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c-8-\n--\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c-17- */\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c:18:int ipc_coredump_collect(struct iosm_devlink *devlink, u8 **data, int entry,\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c-19-\t\t\t u32 region_size)\n--\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c-63- */\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c:64:int ipc_coredump_get_list(struct iosm_devlink *devlink, u16 cmd)\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c-65-{\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c-66-\tu32 byte_read, num_entries, file_size;\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c:67:\tstruct iosm_cd_table *cd_table;\ndrivers/net/wwan/iosm/iosm_ipc_coredump.c-68-\tu8 size[MAX_SIZE_LEN], i;\n--\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-8-\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:9:#include \"iosm_ipc_devlink.h\"\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-10-\n--\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-20-/**\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:21: * struct iosm_cd_list_entry - Structure to hold coredump file info.\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-22- * @size: Number of bytes for the entry\n--\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-24- */\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:25:struct iosm_cd_list_entry {\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-26-\t__le32 size;\n--\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-30-/**\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:31: * struct iosm_cd_list - Structure to hold list of coredump files\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-32- * to be collected.\n--\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-35- */\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:36:struct iosm_cd_list {\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-37-\t__le32 num_entries;\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:38:\tstruct iosm_cd_list_entry entry[];\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-39-} __packed;\n--\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-41-/**\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:42: * struct iosm_cd_table - Common Coredump table\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-43- * @version: Version of coredump structure\n--\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-45- */\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:46:struct iosm_cd_table {\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-47-\t__le32 version;\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:48:\tstruct iosm_cd_list list;\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-49-} __packed;\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-50-\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:51:int ipc_coredump_collect(struct iosm_devlink *devlink, u8 **data, int entry,\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-52-\t\t\t u32 region_size);\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-53-\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h:54:int ipc_coredump_get_list(struct iosm_devlink *devlink, u16 cmd);\ndrivers/net/wwan/iosm/iosm_ipc_coredump.h-55-\n--\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.c-8-\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.c:9:#include \"iosm_ipc_imem.h\"\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.c:10:#include \"iosm_ipc_trace.h\"\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.c:11:#include \"iosm_ipc_debugfs.h\"\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.c-12-\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.c:13:void ipc_debugfs_init(struct iosm_imem *ipc_imem)\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.c-14-{\n--\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.c-24-\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.c:25:void ipc_debugfs_deinit(struct iosm_imem *ipc_imem)\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.c-26-{\n--\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.h-9-#ifdef CONFIG_WWAN_DEBUGFS\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.h:10:void ipc_debugfs_init(struct iosm_imem *ipc_imem);\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.h:11:void ipc_debugfs_deinit(struct iosm_imem *ipc_imem);\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.h-12-#else\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.h:13:static inline void ipc_debugfs_init(struct iosm_imem *ipc_imem) {}\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.h:14:static inline void ipc_debugfs_deinit(struct iosm_imem *ipc_imem) {}\ndrivers/net/wwan/iosm/iosm_ipc_debugfs.h-15-#endif\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-6-\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:7:#include \"iosm_ipc_chnl_cfg.h\"\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:8:#include \"iosm_ipc_coredump.h\"\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:9:#include \"iosm_ipc_devlink.h\"\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:10:#include \"iosm_ipc_flash.h\"\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-11-\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-12-/* Coredump list */\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:13:static struct iosm_coredump_file_info list[IOSM_NOF_CD_REGION] = {\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-14-\t{\"report.json\", REPORT_JSON_SIZE,},\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c=23=static int ipc_devlink_get_param(struct devlink *dl, u32 id,\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-26-{\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:27:\tstruct iosm_devlink *ipc_devlink = devlink_priv(dl);\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-28-\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c=36=static int ipc_devlink_set_param(struct devlink *dl, u32 id,\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-39-{\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:40:\tstruct iosm_devlink *ipc_devlink = devlink_priv(dl);\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-41-\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-48-/* Devlink param structure array */\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:49:static const struct devlink_param iosm_devlink_params[] = {\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-50-\tDEVLINK_PARAM_DRIVER(IOSM_DEVLINK_PARAM_ID_ERASE_FULL_FLASH,\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-57-/* Get devlink flash component type */\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:58:static enum iosm_flash_comp_type\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-59-ipc_devlink_get_flash_comp_type(const char comp_str[], u32 len)\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-60-{\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:61:\tenum iosm_flash_comp_type fls_type;\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-62-\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c=79=static int ipc_devlink_flash_update(struct devlink *devlink,\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-82-{\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:83:\tstruct iosm_devlink *ipc_devlink = devlink_priv(devlink);\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:84:\tenum iosm_flash_comp_type fls_type;\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:85:\tstruct iosm_devlink_image *header;\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-86-\tint rc = -EINVAL;\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-88-\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:89:\theader = (struct iosm_devlink_image *)params-\u003efw-\u003edata;\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-90-\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c=137=static const struct devlink_ops devlink_flash_ops = {\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-142- * ipc_devlink_send_cmd - Send command to Modem\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:143: * @ipc_devlink: Pointer to struct iosm_devlink\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-144- * @cmd: Command to be sent to modem\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-148- */\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:149:int ipc_devlink_send_cmd(struct iosm_devlink *ipc_devlink, u16 cmd, u32 entry)\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-150-{\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:151:\tstruct iosm_rpsi_cmd rpsi_cmd;\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-152-\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c=163=static int ipc_devlink_coredump_snapshot(struct devlink *dl,\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-167-{\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:168:\tstruct iosm_devlink *ipc_devlink = devlink_priv(dl);\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:169:\tstruct iosm_coredump_file_info *cd_list = ops-\u003epriv;\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-170-\tu32 region_size;\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-194-/* To create regions for coredump files */\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:195:static int ipc_devlink_create_region(struct iosm_devlink *devlink)\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-196-{\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-200-\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:201:\tmdm_coredump = devlink-\u003eiosm_devlink_mdm_coredump;\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-202-\tfor (i = 0; i \u003c IOSM_NOF_CD_REGION; i++) {\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-226-/* To Destroy devlink regions */\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:227:static void ipc_devlink_destroy_region(struct iosm_devlink *ipc_devlink)\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-228-{\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-236- * ipc_devlink_init - Initialize/register devlink to IOSM driver\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:237: * @ipc_imem: Pointer to struct iosm_imem\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-238- *\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:239: * Returns: Pointer to iosm_devlink on success and NULL on failure\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-240- */\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:241:struct iosm_devlink *ipc_devlink_init(struct iosm_imem *ipc_imem)\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-242-{\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-243-\tstruct ipc_chnl_cfg chnl_cfg_flash = { 0 };\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c:244:\tstruct iosm_devlink *ipc_devlink;\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-245-\tstruct devlink *devlink_ctx;\n--\ndrivers/net/wwan/iosm/iosm_ipc_devlink.c-248-\tdevlink_ctx = devlink_alloc(\u0026devlink_flash_ops,\n\n"
} |
| 29/2 | 2026/10/20 13:22 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 26502 output: 21 thoughts: 105 Thoughts: **My Analysis of the `iosm` Driver and its Scope** Okay, so I'm focusing on `iosm` here. My understanding, based on current documentation, is that it's *exclusively* for Intel M.2 WWAN devices, specifically those using Intel XMM 7360 or 7560 LTE modems. Those PCI device IDs are 0x7560 and 0x7360 respectively, if I recall correctly. However, I need to confirm this assumption. The real question I need to ask myself is: is this entirely accurate? Are there any *other* PCI device IDs or other drivers, perhaps legacy or in certain configurations, that might also utilize `iosm`? It would be dangerous to assume it's entirely exclusive to the 7360/7560. To solidify my understanding and rule out any conflicting usages, I should double-check the definitions of `INTEL_CP_DEVICE_7560_ID` and `INTEL_CP_DEVICE_7360_ID`. This quick verification will either confirm my initial assessment or alert me to any potential overlaps or other uses of this driver. |
| 30/2 | 2026/10/20 13:22 | tool | grepper |
0mArgs:{
"Expression": "INTEL_CP_DEVICE_"
}Results: {
"Output": "drivers/net/wwan/iosm/iosm_ipc_imem.c=562=static void ipc_imem_run_state_worker(struct work_struct *instance)\n--\ndrivers/net/wwan/iosm/iosm_ipc_imem.c-598-\ndrivers/net/wwan/iosm/iosm_ipc_imem.c:599:\t\t\tif (ipc_imem-\u003epcie-\u003epci-\u003edevice == INTEL_CP_DEVICE_7560_ID \u0026\u0026\ndrivers/net/wwan/iosm/iosm_ipc_imem.c-600-\t\t\t chnl_cfg_port.wwan_port_type == WWAN_PORT_XMMRPC) {\n--\ndrivers/net/wwan/iosm/iosm_ipc_imem.c-604-\ndrivers/net/wwan/iosm/iosm_ipc_imem.c:605:\t\t\tif (ipc_imem-\u003epcie-\u003epci-\u003edevice == INTEL_CP_DEVICE_7360_ID \u0026\u0026\ndrivers/net/wwan/iosm/iosm_ipc_imem.c-606-\t\t\t chnl_cfg_port.wwan_port_type == WWAN_PORT_MBIM) {\n--\ndrivers/net/wwan/iosm/iosm_ipc_pcie.c=336=static const struct pci_device_id iosm_ipc_ids[] = {\ndrivers/net/wwan/iosm/iosm_ipc_pcie.c:337:\t{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, INTEL_CP_DEVICE_7560_ID) },\ndrivers/net/wwan/iosm/iosm_ipc_pcie.c:338:\t{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, INTEL_CP_DEVICE_7360_ID) },\ndrivers/net/wwan/iosm/iosm_ipc_pcie.c-339-\t{}\n--\ndrivers/net/wwan/iosm/iosm_ipc_pcie.h-15-/* Device ID */\ndrivers/net/wwan/iosm/iosm_ipc_pcie.h:16:#define INTEL_CP_DEVICE_7560_ID 0x7560\ndrivers/net/wwan/iosm/iosm_ipc_pcie.h:17:#define INTEL_CP_DEVICE_7360_ID 0x7360\ndrivers/net/wwan/iosm/iosm_ipc_pcie.h-18-\n"
} |
| 31/2 | 2026/10/20 13:22 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 27532 output: 142 thoughts: 1133 Thoughts: **WorthFuzzing Assessment: `iosm` Driver** Okay, so the initial assessment is that `iosm` is specifically for Intel 7560 and 7360 CP devices, which are PCI devices. The instructions are clear: if modified code is structurally unreachable, then `WorthFuzzing=false`. The prompt explicitly lists "Vendor-specific PCIe switches, SmartNICs, or GPU drivers... requiring physical ASIC/PCIe cards not emulated in standard QEMU" as a reason to return `WorthFuzzing=false`. I need to confirm if this driver is loadable and probe-able in QEMU. Standard QEMU doesn't emulate the Intel XMM 7360/7560 WWAN PCI modems (0x8086:0x7560/0x7360). Even if there was *some* PCI emulation or Syzkaller support, this particular device, being an Intel WWAN 7360/7560 modem, is vendor-specific PCIe hardware that requires physical ASIC / M.2 PCIe modem card. Syzkaller doesn't emulate arbitrary PCI devices unless there is a virtual driver/bus or standard QEMU emulated hardware (like e1000, virtio-*). So, without the physical hardware, `ipc_pcie_probe()` – and therefore, `ipc_protocol_free_msg_get()` in `iosm_ipc_protocol_ops.c` – can't possibly run or be reached. Let's look at the patch itself to be sure. The modified function is `ipc_protocol_free_msg_get()`, which is an internal helper in `iosm_ipc_protocol_ops.c`. This file is solely part of `iosm.ko` and lives in `drivers/net/wwan/iosm/`. `iosm` is a PCIe driver for Intel 7360 and 7560 M.2 WWAN modems. Since QEMU and GCE don't emulate those specific PCIe devices, this code is structurally unreachable during fuzzing. Therefore, the only conclusion I can reach is that `WorthFuzzing=false`. Given this, the associated `EnableConfigs` should be empty (or null, or `[]`). The `FocusSymbols` should also be `[]`. The reasoning is clear: it's a vendor-specific PCIe driver for Intel M.2 WWAN modems (Intel XMM 7360/7560), which requires physical hardware that isn't emulated in QEMU or GCE environments. Final sanity check: * WorthFuzzing: `false` * FocusSymbols: `[]` * EnableConfigs: `[]` * Reasoning: Concise and accurate. Looks correct. |
| 32/2 | 2026/10/20 13:23 | tool | set-results |
0mArgs:{
"EnableConfigs": [],
"FocusSymbols": [],
"Reasoning": "The patch modifies ipc_protocol_free_msg_get() in drivers/net/wwan/iosm/iosm_ipc_protocol_ops.c, adding a boundary check on the message head index. The IOSM driver specifically targets Intel M.2 WWAN modems (Intel XMM 7360/7560 PCIe devices) and requires physical PCIe hardware not emulated in standard QEMU/GCE virtualized fuzzing environments. Because the device cannot probe, the modified code is structurally unreachable.",
"WorthFuzzing": false
}Results: {
"EnableConfigs": null,
"FocusSymbols": [],
"Reasoning": "The patch modifies ipc_protocol_free_msg_get() in drivers/net/wwan/iosm/iosm_ipc_protocol_ops.c, adding a boundary check on the message head index. The IOSM driver specifically targets Intel M.2 WWAN modems (Intel XMM 7360/7560 PCIe devices) and requires physical PCIe hardware not emulated in standard QEMU/GCE virtualized fuzzing environments. Because the device cannot probe, the modified code is structurally unreachable.",
"WorthFuzzing": false
} |
| 33/1 | 2026/10/20 13:23 | action | If |
0mArgs:{
"WorthFuzzing": false
}Results: null |
| Total Calls | Total Tokens | Avg Tokens | Total Duration (Seconds) | Avg Duration (Seconds) |
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| Total Calls | Total Duration (Seconds) | Avg Duration (Seconds) |
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