==================================================================
BUG: KCSAN: data-race in touch_atime / touch_atime

write to 0xffff88810712e2d8 of 4 bytes by task 3307 on cpu 0:
 inode_set_atime_to_ts include/linux/fs.h:1624 [inline]
 inode_update_timestamps fs/inode.c:2129 [inline]
 generic_update_time fs/inode.c:2151 [inline]
 inode_update_time fs/inode.c:2171 [inline]
 touch_atime+0x1e8/0x340 fs/inode.c:2243
 pick_link+0x7e7/0x8d0 fs/namei.c:1996
 step_into_slowpath+0x36a/0x4c0 fs/namei.c:2074
 step_into fs/namei.c:2099 [inline]
 walk_component fs/namei.c:2235 [inline]
 link_path_walk+0x974/0xe30 fs/namei.c:2597
 path_openat+0x1bf/0x23c0 fs/namei.c:4792
 do_filp_open+0x15d/0x280 fs/namei.c:4823
 do_sys_openat2+0xa6/0x150 fs/open.c:1430
 do_sys_open fs/open.c:1436 [inline]
 __do_sys_openat fs/open.c:1452 [inline]
 __se_sys_openat fs/open.c:1447 [inline]
 __x64_sys_openat+0xf2/0x120 fs/open.c:1447
 x64_sys_call+0x2b07/0x3000 arch/x86/include/generated/asm/syscalls_64.h:258
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xc0/0x2a0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff88810712e2d8 of 4 bytes by task 3303 on cpu 1:
 inode_get_atime_nsec include/linux/fs.h:1609 [inline]
 inode_get_atime include/linux/fs.h:1615 [inline]
 inode_update_timestamps fs/inode.c:2126 [inline]
 generic_update_time fs/inode.c:2151 [inline]
 inode_update_time fs/inode.c:2171 [inline]
 touch_atime+0x194/0x340 fs/inode.c:2243
 pick_link+0x7e7/0x8d0 fs/namei.c:1996
 step_into_slowpath+0x36a/0x4c0 fs/namei.c:2074
 step_into fs/namei.c:2099 [inline]
 walk_component fs/namei.c:2235 [inline]
 link_path_walk+0x974/0xe30 fs/namei.c:2597
 path_openat+0x1bf/0x23c0 fs/namei.c:4792
 do_filp_open+0x15d/0x280 fs/namei.c:4823
 do_sys_openat2+0xa6/0x150 fs/open.c:1430
 do_sys_open fs/open.c:1436 [inline]
 __do_sys_openat fs/open.c:1452 [inline]
 __se_sys_openat fs/open.c:1447 [inline]
 __x64_sys_openat+0xf2/0x120 fs/open.c:1447
 x64_sys_call+0x2b07/0x3000 arch/x86/include/generated/asm/syscalls_64.h:258
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xc0/0x2a0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x127a6408 -> 0x14b87e50

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3303 Comm: udevd Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
==================================================================
udevd[3303]: inotify_add_watch(7, /dev/loop5p1, 10) failed: No such file or directory
udevd[3303]: inotify_add_watch(7, /dev/loop5p4, 10) failed: No such file or directory