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BUG: KCSAN: data-race in generic_fillattr / inode_set_ctime_current

write to 0xffff888102ae72f0 of 8 bytes by task 30962 on cpu 0:
 inode_set_ctime_to_ts include/linux/fs.h:1597 [inline]
 inode_set_ctime include/linux/fs.h:1615 [inline]
 inode_set_ctime_current+0x16c/0x1d0 fs/inode.c:2548
 shmem_mknod+0x113/0x180 mm/shmem.c:3244
 shmem_create+0x34/0x40 mm/shmem.c:3298
 lookup_open fs/namei.c:3477 [inline]
 open_last_lookups fs/namei.c:3546 [inline]
 path_openat+0xdc2/0x1d70 fs/namei.c:3776
 do_filp_open+0xf6/0x200 fs/namei.c:3809
 do_sys_openat2+0xab/0x110 fs/open.c:1440
 do_sys_open fs/open.c:1455 [inline]
 __do_sys_openat fs/open.c:1471 [inline]
 __se_sys_openat fs/open.c:1466 [inline]
 __x64_sys_openat+0xf3/0x120 fs/open.c:1466
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

read to 0xffff888102ae72f0 of 8 bytes by task 28295 on cpu 1:
 inode_get_ctime include/linux/fs.h:1591 [inline]
 generic_fillattr+0x1e0/0x2f0 fs/stat.c:62
 shmem_getattr+0x17b/0x200 mm/shmem.c:1121
 vfs_getattr_nosec fs/stat.c:135 [inline]
 vfs_getattr fs/stat.c:172 [inline]
 vfs_statx+0x266/0x430 fs/stat.c:244
 vfs_fstatat+0xcd/0x100 fs/stat.c:295
 __do_sys_newfstatat fs/stat.c:459 [inline]
 __se_sys_newfstatat+0x58/0x260 fs/stat.c:453
 __x64_sys_newfstatat+0x55/0x60 fs/stat.c:453
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x000000002f8de7ae -> 0x000000000075a16f

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 28295 Comm: udevd Tainted: G        W          6.7.0-rc2-syzkaller-00095-gd3fa86b1a7b4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
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