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BUG: KCSAN: data-race in generic_fillattr / shmem_unlink

write to 0xffff888102ec5870 of 8 bytes by task 3304 on cpu 1:
 inode_set_mtime_to_ts include/linux/fs.h:1594 [inline]
 shmem_unlink+0x150/0x190 mm/shmem.c:3400
 vfs_unlink+0x265/0x3f0 fs/namei.c:4338
 do_unlinkat+0x236/0x4c0 fs/namei.c:4402
 __do_sys_unlink fs/namei.c:4450 [inline]
 __se_sys_unlink fs/namei.c:4448 [inline]
 __x64_sys_unlink+0x30/0x40 fs/namei.c:4448
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

read to 0xffff888102ec5870 of 8 bytes by task 3272 on cpu 0:
 inode_get_mtime include/linux/fs.h:1588 [inline]
 generic_fillattr+0x1a6/0x2f0 fs/stat.c:61
 shmem_getattr+0x17b/0x200 mm/shmem.c:1145
 vfs_getattr_nosec fs/stat.c:135 [inline]
 vfs_getattr+0x19b/0x1e0 fs/stat.c:176
 vfs_statx+0x140/0x320 fs/stat.c:248
 vfs_fstatat+0xcd/0x100 fs/stat.c:304
 __do_sys_newfstatat fs/stat.c:468 [inline]
 __se_sys_newfstatat+0x58/0x260 fs/stat.c:462
 __x64_sys_newfstatat+0x55/0x70 fs/stat.c:462
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

value changed: 0x00000000128f3566 -> 0x000000001327cbe6

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3272 Comm: udevd Not tainted 6.8.0-syzkaller-11752-gdba89d1b81df #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
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