==================================================================
BUG: KCSAN: data-race in file_update_time / inode_update_timestamps

write to 0xffff888107ed18d8 of 8 bytes by task 11970 on cpu 0:
 inode_set_ctime_to_ts include/linux/fs.h:1624 [inline]
 inode_set_ctime_current fs/inode.c:2515 [inline]
 inode_update_timestamps+0xa9/0x280 fs/inode.c:1861
 generic_update_time fs/inode.c:1900 [inline]
 inode_update_time fs/inode.c:1920 [inline]
 __file_update_time fs/inode.c:2109 [inline]
 file_update_time+0x22f/0x2c0 fs/inode.c:2139
 pipe_write+0xa87/0xd30 fs/pipe.c:607
 call_write_iter include/linux/fs.h:2108 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0x771/0x8e0 fs/read_write.c:590
 ksys_write+0xeb/0x1b0 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __x64_sys_write+0x42/0x50 fs/read_write.c:652
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

read to 0xffff888107ed18d8 of 8 bytes by task 11959 on cpu 1:
 inode_get_ctime include/linux/fs.h:1618 [inline]
 inode_needs_update_time fs/inode.c:2092 [inline]
 file_update_time+0xe5/0x2c0 fs/inode.c:2135
 pipe_write+0xa87/0xd30 fs/pipe.c:607
 call_write_iter include/linux/fs.h:2108 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0x771/0x8e0 fs/read_write.c:590
 ksys_write+0xeb/0x1b0 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __x64_sys_write+0x42/0x50 fs/read_write.c:652
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

value changed: 0x0000000065fa55b5 -> 0x0000000065fa55b6

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 11959 Comm: syz-executor.0 Not tainted 6.8.0-syzkaller-11743-ga4145ce1e7bc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
==================================================================