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BUG: KCSAN: data-race in atime_needs_update / touch_atime

write to 0xffff8881208d3498 of 4 bytes by task 13583 on cpu 0:
 inode_set_atime_to_ts include/linux/fs.h:1626 [inline]
 inode_update_atime fs/inode.c:2160 [inline]
 inode_update_time fs/inode.c:2224 [inline]
 generic_update_time fs/inode.c:2257 [inline]
 touch_atime+0x1cb/0x300 fs/inode.c:2335
 pick_link+0x7ed/0x8e0 fs/namei.c:2049
 step_into_slowpath+0x36a/0x4c0 fs/namei.c:2127
 step_into fs/namei.c:2152 [inline]
 walk_component fs/namei.c:2288 [inline]
 link_path_walk+0x947/0xdd0 fs/namei.c:-1
 path_parentat fs/namei.c:2860 [inline]
 __filename_parentat+0x1ad/0x460 fs/namei.c:2884
 filename_parentat fs/namei.c:2902 [inline]
 filename_create+0x78/0x220 fs/namei.c:4932
 filename_mkdirat+0x81/0x300 fs/namei.c:5298
 __do_sys_mkdir fs/namei.c:5332 [inline]
 __se_sys_mkdir+0x31/0xf0 fs/namei.c:5329
 __x64_sys_mkdir+0x31/0x40 fs/namei.c:5329
 x64_sys_call+0x2eab/0x3020 arch/x86/include/generated/asm/syscalls_64.h:84
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x136/0x3c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff8881208d3498 of 4 bytes by task 13579 on cpu 1:
 atime_needs_update+0x25f/0x3e0 fs/inode.c:-1
 pick_link+0x36e/0x8e0 fs/namei.c:2044
 step_into_slowpath+0x36a/0x4c0 fs/namei.c:2127
 step_into fs/namei.c:2152 [inline]
 walk_component fs/namei.c:2288 [inline]
 link_path_walk+0x947/0xdd0 fs/namei.c:-1
 path_parentat fs/namei.c:2860 [inline]
 __filename_parentat+0x1ad/0x460 fs/namei.c:2884
 filename_parentat fs/namei.c:2902 [inline]
 filename_create+0x78/0x220 fs/namei.c:4932
 filename_mkdirat+0x81/0x300 fs/namei.c:5298
 __do_sys_mkdir fs/namei.c:5332 [inline]
 __se_sys_mkdir+0x31/0xf0 fs/namei.c:5329
 __x64_sys_mkdir+0x31/0x40 fs/namei.c:5329
 x64_sys_call+0x2eab/0x3020 arch/x86/include/generated/asm/syscalls_64.h:84
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x136/0x3c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x2df98c21 -> 0x2f7c2e39

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 13579 Comm: syz.6.2646 Tainted: G        W           syzkaller #0 PREEMPT(lazy) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
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