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BUG: KCSAN: data-race in atime_needs_update / inode_set_ctime_current

write to 0xffff88811b87a3e0 of 4 bytes by task 3302 on cpu 1:
 inode_set_ctime_to_ts fs/inode.c:2772 [inline]
 inode_set_ctime_current+0x256/0x8c0 fs/inode.c:2835
 shmem_xattr_handler_set+0x1e4/0x260 mm/shmem.c:4371
 __vfs_setxattr+0x2e6/0x310 fs/xattr.c:218
 __vfs_setxattr_noperm+0xe8/0x410 fs/xattr.c:252
 __vfs_setxattr_locked+0x105/0x220 fs/xattr.c:313
 vfs_setxattr+0x12c/0x2a0 fs/xattr.c:339
 do_setxattr fs/xattr.c:654 [inline]
 filename_setxattr+0x1c4/0x410 fs/xattr.c:682
 path_setxattrat+0x2be/0x310 fs/xattr.c:726
 __do_sys_lsetxattr fs/xattr.c:767 [inline]
 __se_sys_lsetxattr fs/xattr.c:763 [inline]
 __x64_sys_lsetxattr+0x71/0x90 fs/xattr.c:763
 x64_sys_call+0x1300/0x3020 arch/x86/include/generated/asm/syscalls_64.h:190
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x12c/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff88811b87a3e0 of 4 bytes by task 3298 on cpu 0:
 inode_get_ctime_nsec include/linux/fs.h:1690 [inline]
 inode_get_ctime include/linux/fs.h:1696 [inline]
 relatime_need_update fs/inode.c:2074 [inline]
 atime_needs_update+0x333/0x3e0 fs/inode.c:2232
 touch_atime+0x4a/0x330 fs/inode.c:2247
 do_readlinkat+0x137/0x2f0 fs/stat.c:582
 __do_sys_readlink fs/stat.c:605 [inline]
 __se_sys_readlink fs/stat.c:602 [inline]
 __x64_sys_readlink+0x47/0x60 fs/stat.c:602
 x64_sys_call+0x2b51/0x3020 arch/x86/include/generated/asm/syscalls_64.h:90
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x12c/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x386e844f -> 0x392bfcb7

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 3298 Comm: udevd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
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