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| ID | Workflow | Result | Correct | Bug | Created | Started | Finished | Revision | Error |
|---|---|---|---|---|---|---|---|---|---|
| 036f8d23-b023-408e-9165-e6b193fabd7f | assessment-kcsan | Benign: ✅ Confident: ✅ | ❓ | KCSAN: data-race in drop_nlink / vfs_coredump | 2026/01/26 23:22 | 2026/01/26 23:22 | 2026/01/26 23:24 | efb3e894dd7e30475c92970989c58e5aad3d5e7b |
================================================================== BUG: KCSAN: data-race in drop_nlink / vfs_coredump write to 0xffff88811b612690 of 4 bytes by task 4734 on cpu 1: drop_nlink+0x3d/0xa0 fs/inode.c:419 __simple_unlink fs/libfs.c:794 [inline] simple_unlink+0x60/0x80 fs/libfs.c:808 shmem_unlink+0x12d/0x140 mm/shmem.c:4005 vfs_unlink+0x1c7/0x490 fs/namei.c:5470 filename_unlinkat+0x1e2/0x410 fs/namei.c:5540 coredump_file fs/coredump.c:903 [inline] do_coredump fs/coredump.c:1100 [inline] vfs_coredump+0x1556/0x3130 fs/coredump.c:1201 get_signal+0xd80/0xf60 kernel/signal.c:3019 arch_do_signal_or_restart+0x96/0x450 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop kernel/entry/common.c:98 [inline] __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:270 [inline] irqentry_exit_to_user_mode include/linux/irq-entry-common.h:339 [inline] irqentry_exit+0xf7/0x520 kernel/entry/common.c:219 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 read to 0xffff88811b612690 of 4 bytes by task 4735 on cpu 0: coredump_file fs/coredump.c:938 [inline] do_coredump fs/coredump.c:1100 [inline] vfs_coredump+0x166a/0x3130 fs/coredump.c:1201 get_signal+0xd80/0xf60 kernel/signal.c:3019 arch_do_signal_or_restart+0x96/0x450 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop kernel/entry/common.c:98 [inline] __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:270 [inline] irqentry_exit_to_user_mode include/linux/irq-entry-common.h:339 [inline] irqentry_exit+0xf7/0x520 kernel/entry/common.c:219 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 value changed: 0x00000001 -> 0x00000000 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 4735 Comm: syz.6.326 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 ==================================================================
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026/03/17 14:05 | upstream | 2d1373e4246d | c01bca74 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in drop_nlink / vfs_coredump | ||
| 2026/01/26 21:04 | upstream | 63804fed149a | a4c52dd6 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in drop_nlink / vfs_coredump |