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================================================================== BUG: KCSAN: data-race in d_alloc_parallel / d_set_d_op read-write to 0xffff88810636c480 of 4 bytes by task 24401 on cpu 0: d_set_d_op+0xfb/0x1f0 fs/dcache.c:1814 proc_pident_instantiate+0x164/0x180 fs/proc/base.c:2710 proc_pident_lookup+0x112/0x190 fs/proc/base.c:2733 proc_tgid_base_lookup+0x2b/0x40 fs/proc/base.c:3445 __lookup_slow+0x184/0x250 fs/namei.c:1791 lookup_slow+0x3c/0x60 fs/namei.c:1808 walk_component fs/namei.c:2112 [inline] link_path_walk+0x69e/0x820 fs/namei.c:2477 path_openat+0x1af/0x1fa0 fs/namei.c:3983 do_filp_open+0x107/0x230 fs/namei.c:4014 do_sys_openat2+0xab/0x120 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0xf3/0x120 fs/open.c:1428 x64_sys_call+0x2b30/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:258 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff88810636c480 of 4 bytes by task 24402 on cpu 1: d_in_lookup include/linux/dcache.h:378 [inline] d_wait_lookup fs/dcache.c:2471 [inline] d_alloc_parallel+0x5fe/0xc60 fs/dcache.c:2559 __lookup_slow+0x8d/0x250 fs/namei.c:1776 lookup_slow+0x3c/0x60 fs/namei.c:1808 walk_component fs/namei.c:2112 [inline] link_path_walk+0x69e/0x820 fs/namei.c:2477 path_openat+0x1af/0x1fa0 fs/namei.c:3983 do_filp_open+0x107/0x230 fs/namei.c:4014 do_sys_openat2+0xab/0x120 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0xf3/0x120 fs/open.c:1428 x64_sys_call+0x2b30/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:258 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x10000000 -> 0x1000000c Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 24402 Comm: syz.6.5429 Tainted: G W 6.13.0-rc4-syzkaller-00012-g9b2ffa6148b1 #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ==================================================================
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024/12/26 09:30 | upstream | 9b2ffa6148b1 | 444551c4 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in d_alloc_parallel / d_set_d_op |