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

write to 0xffff888104946988 of 8 bytes by task 6795 on cpu 0:
 inode_set_atime_to_ts include/linux/fs.h:1623 [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+0x1d2/0x340 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]
 lookup_last fs/namei.c:2730 [inline]
 path_lookupat+0x330/0x500 fs/namei.c:2754
 filename_lookup+0x190/0x390 fs/namei.c:2783
 vfs_statx+0x9d/0x3b0 fs/stat.c:353
 vfs_fstatat+0x115/0x170 fs/stat.c:375
 __do_sys_newfstatat fs/stat.c:542 [inline]
 __se_sys_newfstatat+0x55/0x3e0 fs/stat.c:536
 __x64_sys_newfstatat+0x55/0x70 fs/stat.c:536
 x64_sys_call+0x111f/0x3000 arch/x86/include/generated/asm/syscalls_64.h:263
 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 0xffff888104946988 of 8 bytes by task 6788 on cpu 1:
 atime_needs_update+0x252/0x3e0 fs/inode.c:-1
 pick_link+0x371/0x8d0 fs/namei.c:1991
 step_into_slowpath+0x36a/0x4c0 fs/namei.c:2074
 step_into fs/namei.c:2099 [inline]
 walk_component fs/namei.c:2235 [inline]
 lookup_last fs/namei.c:2730 [inline]
 path_lookupat+0x330/0x500 fs/namei.c:2754
 filename_lookup+0x190/0x390 fs/namei.c:2783
 vfs_statx+0x9d/0x3b0 fs/stat.c:353
 vfs_fstatat+0x115/0x170 fs/stat.c:375
 __do_sys_newfstatat fs/stat.c:542 [inline]
 __se_sys_newfstatat+0x55/0x3e0 fs/stat.c:536
 __x64_sys_newfstatat+0x55/0x70 fs/stat.c:536
 x64_sys_call+0x111f/0x3000 arch/x86/include/generated/asm/syscalls_64.h:263
 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: 0x0000000069743d99 -> 0x0000000069743f2f

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 6788 Comm: udevd Tainted: G        W           syzkaller #0 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
==================================================================
udevd[6788]: inotify_add_watch(7, /dev/loop1p5, 10) failed: No such file or directory
udevd[6788]: inotify_add_watch(7, /dev/loop1p5, 10) failed: No such file or directory