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BUG: KCSAN: data-race in atime_needs_update / touch_atime

write to 0xffff8881068c7cd8 of 8 bytes by task 2530 on cpu 1:
 inode_set_atime_to_ts include/linux/fs.h:1564 [inline]
 inode_update_timestamps fs/inode.c:1878 [inline]
 generic_update_time fs/inode.c:1900 [inline]
 inode_update_time fs/inode.c:1920 [inline]
 touch_atime+0x1f3/0x350 fs/inode.c:1992
 pick_link+0x31a/0x7e0 fs/namei.c:1790
 step_into+0x725/0x810 fs/namei.c:1874
 walk_component fs/namei.c:2010 [inline]
 link_path_walk+0x49d/0x810 fs/namei.c:2331
 path_parentat fs/namei.c:2532 [inline]
 __filename_parentat+0x13c/0x3c0 fs/namei.c:2556
 filename_parentat fs/namei.c:2574 [inline]
 filename_create+0x77/0x2b0 fs/namei.c:3873
 do_mkdirat+0x63/0x2a0 fs/namei.c:4141
 __do_sys_mkdirat fs/namei.c:4164 [inline]
 __se_sys_mkdirat fs/namei.c:4162 [inline]
 __x64_sys_mkdirat+0x50/0x60 fs/namei.c:4162
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x72/0x7a

read to 0xffff8881068c7cd8 of 8 bytes by task 2532 on cpu 0:
 atime_needs_update+0x268/0x3f0
 pick_link+0x2f9/0x7e0 fs/namei.c:1787
 step_into+0x725/0x810 fs/namei.c:1874
 walk_component fs/namei.c:2010 [inline]
 link_path_walk+0x49d/0x810 fs/namei.c:2331
 path_lookupat+0x72/0x2b0 fs/namei.c:2484
 do_o_path+0x44/0x120 fs/namei.c:3770
 path_openat+0x1a73/0x1d80 fs/namei.c:3792
 do_filp_open+0xf7/0x200 fs/namei.c:3826
 do_sys_openat2+0xab/0x120 fs/open.c:1406
 do_sys_open fs/open.c:1421 [inline]
 __do_sys_openat fs/open.c:1437 [inline]
 __se_sys_openat fs/open.c:1432 [inline]
 __x64_sys_openat+0xf3/0x120 fs/open.c:1432
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x72/0x7a

value changed: 0x0000000003001869 -> 0x0000000003a03899

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 2532 Comm: syz-executor.4 Tainted: G        W          6.9.0-rc1-syzkaller-00355-g712e14250dd2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
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