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

write to 0xffff888100770180 of 8 bytes by task 9954 on cpu 1:
 inode_set_atime_to_ts include/linux/fs.h:1671 [inline]
 inode_update_timestamps fs/inode.c:2035 [inline]
 generic_update_time fs/inode.c:2057 [inline]
 inode_update_time fs/inode.c:2077 [inline]
 touch_atime+0x1d2/0x330 fs/inode.c:2149
 pick_link+0x33b/0x820 fs/namei.c:1924
 step_into+0x7b6/0x820 fs/namei.c:2008
 walk_component fs/namei.c:2144 [inline]
 link_path_walk+0x545/0x8b0 fs/namei.c:2503
 path_openat+0x1de/0x2170 fs/namei.c:4035
 do_filp_open+0x109/0x230 fs/namei.c:4066
 do_sys_openat2+0xa6/0x110 fs/open.c:1429
 do_sys_open fs/open.c:1444 [inline]
 __do_sys_openat fs/open.c:1460 [inline]
 __se_sys_openat fs/open.c:1455 [inline]
 __x64_sys_openat+0xf2/0x120 fs/open.c:1455
 x64_sys_call+0x1af/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:258
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd0/0x1a0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888100770180 of 8 bytes by task 9955 on cpu 0:
 atime_needs_update+0x252/0x3e0 fs/inode.c:-1
 pick_link+0x31a/0x820 fs/namei.c:1921
 step_into+0x7b6/0x820 fs/namei.c:2008
 walk_component fs/namei.c:2144 [inline]
 link_path_walk+0x545/0x8b0 fs/namei.c:2503
 path_openat+0x1de/0x2170 fs/namei.c:4035
 do_filp_open+0x109/0x230 fs/namei.c:4066
 do_sys_openat2+0xa6/0x110 fs/open.c:1429
 do_sys_open fs/open.c:1444 [inline]
 __do_sys_openat fs/open.c:1460 [inline]
 __se_sys_openat fs/open.c:1455 [inline]
 __x64_sys_openat+0xf2/0x120 fs/open.c:1455
 x64_sys_call+0x1af/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:258
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd0/0x1a0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x0000000068175183 -> 0x00000000681b528c

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 9955 Comm: modprobe Not tainted 6.15.0-rc4-syzkaller-00052-g4f79eaa2ceac #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
==================================================================