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BUG: KCSAN: data-race in generic_fillattr / shmem_unlink

write to 0xffff888100e87260 of 4 bytes by task 3449 on cpu 0:
 inode_set_ctime_to_ts include/linux/fs.h:1677 [inline]
 shmem_unlink+0x130/0x180 mm/shmem.c:3551
 shmem_rename2+0x1d4/0x2c0 mm/shmem.c:3631
 vfs_rename+0x875/0x9c0 fs/namei.c:5013
 do_renameat2+0x732/0xa60 fs/namei.c:5170
 __do_sys_rename fs/namei.c:5217 [inline]
 __se_sys_rename fs/namei.c:5215 [inline]
 __x64_sys_rename+0x58/0x70 fs/namei.c:5215
 x64_sys_call+0x1a84/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:83
 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 0xffff888100e87260 of 4 bytes by task 3779 on cpu 1:
 inode_get_ctime_nsec include/linux/fs.h:1662 [inline]
 inode_get_ctime include/linux/fs.h:1668 [inline]
 generic_fillattr+0x1dd/0x2f0 fs/stat.c:62
 shmem_getattr+0x17b/0x200 mm/shmem.c:1157
 vfs_getattr_nosec fs/stat.c:166 [inline]
 vfs_getattr+0x19b/0x1e0 fs/stat.c:207
 vfs_statx_path fs/stat.c:251 [inline]
 vfs_statx+0x134/0x2f0 fs/stat.c:315
 vfs_fstatat+0xec/0x110 fs/stat.c:341
 __do_sys_newfstatat fs/stat.c:505 [inline]
 __se_sys_newfstatat+0x58/0x260 fs/stat.c:499
 __x64_sys_newfstatat+0x55/0x70 fs/stat.c:499
 x64_sys_call+0x141f/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:263
 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: 0x04be1cfd -> 0x0556b37d

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3779 Comm: udevd Tainted: G        W          6.11.0-syzkaller-07341-gbaeb9a7d8b60 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
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