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BUG: KCSAN: data-race in generic_fillattr / shmem_symlink

write to 0xffff888103769580 of 8 bytes by task 5179 on cpu 1:
 inode_set_mtime_to_ts include/linux/fs.h:1594 [inline]
 shmem_symlink+0x349/0x3a0 mm/shmem.c:3548
 vfs_symlink+0xca/0x1b0 fs/namei.c:4484
 do_symlinkat+0xe3/0x350 fs/namei.c:4510
 __do_sys_symlink fs/namei.c:4531 [inline]
 __se_sys_symlink fs/namei.c:4529 [inline]
 __x64_sys_symlink+0x56/0x70 fs/namei.c:4529
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x72/0x7a

read to 0xffff888103769580 of 8 bytes by task 5749 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+0x72/0x7a

value changed: 0x0000000024fac28b -> 0x0000000025921dcc

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 5749 Comm: udevd Not tainted 6.9.0-rc1-syzkaller-00206-g4535e1a4174c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
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