==================================================================
BUG: KCSAN: data-race in may_open / setattr_copy
write to 0xffff888103e05220 of 2 bytes by task 24 on cpu 1:
setattr_copy+0x29d/0x2b0 fs/attr.c:321
shmem_setattr+0x52e/0x830 mm/shmem.c:1220
notify_change+0x866/0x8e0 fs/attr.c:499
handle_remove drivers/base/devtmpfs.c:337 [inline]
handle drivers/base/devtmpfs.c:386 [inline]
devtmpfs_work_loop+0x828/0x8e0 drivers/base/devtmpfs.c:399
devtmpfsd+0x43/0x50 drivers/base/devtmpfs.c:441
kthread+0x1d7/0x210 kernel/kthread.c:388
ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
read to 0xffff888103e05220 of 2 bytes by task 16470 on cpu 0:
may_open+0x42/0x340 fs/namei.c:3242
do_open fs/namei.c:3639 [inline]
path_openat+0x1789/0x1d30 fs/namei.c:3798
do_filp_open+0xf6/0x200 fs/namei.c:3825
do_sys_openat2+0xab/0x110 fs/open.c:1404
do_sys_open fs/open.c:1419 [inline]
__do_sys_openat fs/open.c:1435 [inline]
__se_sys_openat fs/open.c:1430 [inline]
__x64_sys_openat+0xf3/0x120 fs/open.c:1430
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x59/0x120 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
value changed: 0x6180 -> 0x6000
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 16470 Comm: udevd Not tainted 6.8.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
==================================================================
udevd[16470]: inotify_add_watch(7, /dev/loop0, 10) failed: No such file or directory
udevd[16470]: inotify_add_watch(7, /dev/loop0, 10) failed: No such file or directory
udevd[16470]: inotify_add_watch(7, /dev/loop0, 10) failed: No such file or directory
udevd[16470]: inotify_add_watch(7, /dev/loop0, 10) failed: No such file or directory
udevd[16470]: inotify_add_watch(7, /dev/loop0, 10) failed: No such file or directory
udevd[16470]: inotify_add_watch(7, /dev/loop0, 10) failed: No such file or directory
udevd[16470]: inotify_add_watch(7, /dev/loop0, 10) failed: No such file or directory
udevd[16470]: inotify_add_watch(7, /dev/loop0, 10) failed: No such file or directory
udevd[16470]: inotify_add_watch(7, /dev/loop0, 10) failed: No such file or directory
udevd[16470]: setting owner of /dev/loop0 to uid=0, gid=6 failed: No such file or directory
udevd[16470]: inotify_add_watch(7, /dev/loop0, 10) failed: No such file or directory
udevd[16470]: inotify_add_watch(7, /dev/loop0, 10) failed: No such file or directory
udevd[16470]: inotify_add_watch(7, /dev/loop0, 10) failed: No such file or directory
udevd[16470]: inotify_add_watch(7, /dev/loop0, 10) failed: No such file or directory