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BUG: KCSAN: data-race in atime_needs_update / touch_atime

write to 0xffff88812b067708 of 8 bytes by task 18723 on cpu 1:
 inode_set_atime_to_ts include/linux/fs.h:1543 [inline]
 inode_update_timestamps fs/inode.c:1876 [inline]
 generic_update_time fs/inode.c:1898 [inline]
 inode_update_time fs/inode.c:1918 [inline]
 touch_atime+0x1ed/0x340 fs/inode.c:1990
 pick_link+0x30c/0x7b0 fs/namei.c:1791
 step_into+0x71b/0x800 fs/namei.c:1875
 open_last_lookups fs/namei.c:3592 [inline]
 path_openat+0x10da/0x1d40 fs/namei.c:3799
 do_filp_open+0xf6/0x200 fs/namei.c:3829
 do_sys_openat2+0xab/0x110 fs/open.c:1404
 do_sys_open fs/open.c:1419 [inline]
 __do_sys_openat fs/open.c:1435 [inline]
 __se_sys_openat fs/open.c:1430 [inline]
 __x64_sys_openat+0xf3/0x120 fs/open.c:1430
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

read to 0xffff88812b067708 of 8 bytes by task 18740 on cpu 0:
 atime_needs_update+0x264/0x3f0
 pick_link+0x2eb/0x7b0 fs/namei.c:1788
 step_into+0x71b/0x800 fs/namei.c:1875
 open_last_lookups fs/namei.c:3592 [inline]
 path_openat+0x10da/0x1d40 fs/namei.c:3799
 do_filp_open+0xf6/0x200 fs/namei.c:3829
 do_sys_openat2+0xab/0x110 fs/open.c:1404
 do_sys_open fs/open.c:1419 [inline]
 __do_sys_openat fs/open.c:1435 [inline]
 __se_sys_openat fs/open.c:1430 [inline]
 __x64_sys_openat+0xf3/0x120 fs/open.c:1430
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x000000000833a061 -> 0x000000000c5fbde1

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 18740 Comm: syz-executor.3 Not tainted 6.8.0-rc6-syzkaller-00037-g805d849d7c3c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
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