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BUG: KCSAN: data-race in touch_atime / touch_atime

write to 0xffff88810834f9c0 of 8 bytes by task 13855 on cpu 0:
 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
 open_last_lookups fs/namei.c:3589 [inline]
 path_openat+0x10fc/0x1d80 fs/namei.c:3796
 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+0x6d/0x75

read to 0xffff88810834f9c0 of 8 bytes by task 13707 on cpu 1:
 inode_get_atime include/linux/fs.h:1558 [inline]
 inode_update_timestamps fs/inode.c:1875 [inline]
 generic_update_time fs/inode.c:1900 [inline]
 inode_update_time fs/inode.c:1920 [inline]
 touch_atime+0x1a0/0x350 fs/inode.c:1992
 pick_link+0x31a/0x7e0 fs/namei.c:1790
 step_into+0x725/0x810 fs/namei.c:1874
 open_last_lookups fs/namei.c:3589 [inline]
 path_openat+0x10fc/0x1d80 fs/namei.c:3796
 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+0x6d/0x75

value changed: 0x000000001b304971 -> 0x000000001bc8dff1

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 13707 Comm: syz-executor.1 Not tainted 6.9.0-rc1-syzkaller-00011-g498e47cd1d1f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
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