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BUG: KCSAN: data-race in atime_needs_update / inode_set_ctime_current

write to 0xffff888118543820 of 8 bytes by task 3483 on cpu 0:
 inode_set_ctime_current+0x4fa/0x770 fs/inode.c:2811
 shmem_unlink+0x114/0x170 mm/shmem.c:3965
 vfs_unlink+0x275/0x430 fs/namei.c:4525
 do_unlinkat+0x237/0x4d0 fs/namei.c:4589
 __do_sys_unlink fs/namei.c:4637 [inline]
 __se_sys_unlink fs/namei.c:4635 [inline]
 __x64_sys_unlink+0x2e/0x40 fs/namei.c:4635
 x64_sys_call+0x2329/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:88
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888118543820 of 8 bytes by task 2999 on cpu 1:
 inode_get_ctime_sec include/linux/fs.h:1733 [inline]
 inode_get_ctime include/linux/fs.h:1743 [inline]
 relatime_need_update fs/inode.c:2025 [inline]
 atime_needs_update+0x2ed/0x3e0 fs/inode.c:2165
 touch_atime+0x4a/0x350 fs/inode.c:2180
 do_readlinkat+0x12b/0x210 fs/stat.c:577
 __do_sys_readlink fs/stat.c:601 [inline]
 __se_sys_readlink fs/stat.c:598 [inline]
 __x64_sys_readlink+0x47/0x60 fs/stat.c:598
 x64_sys_call+0x28ba/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:90
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x0000000067c6aa09 -> 0x0000000067c6aa0a

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 2999 Comm: udevd Not tainted 6.14.0-rc5-syzkaller-00013-g99fa936e8e4f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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