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BUG: KCSAN: data-race in inode_needs_update_time / inode_update_timestamps

read to 0xffff8881300c7db0 of 8 bytes by task 22696 on cpu 1:
 inode_get_mtime include/linux/fs.h:1565 [inline]
 inode_needs_update_time+0x1c0/0x2f0 fs/inode.c:2123
 file_update_time+0x2d/0x140 fs/inode.c:2170
 pipe_write+0xa81/0xd20 fs/pipe.c:617
 call_write_iter include/linux/fs.h:2085 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0x430/0x6b0 fs/read_write.c:590
 ksys_write+0xeb/0x1a0 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_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x59/0x120 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

write to 0xffff8881300c7db0 of 8 bytes by task 22694 on cpu 0:
 inode_set_mtime_to_ts include/linux/fs.h:1571 [inline]
 inode_update_timestamps+0x3a6/0x560 fs/inode.c:1901
 generic_update_time fs/inode.c:1936 [inline]
 inode_update_time fs/inode.c:1956 [inline]
 __file_update_time fs/inode.c:2144 [inline]
 file_update_time+0xba/0x140 fs/inode.c:2174
 pipe_write+0xa81/0xd20 fs/pipe.c:617
 call_write_iter include/linux/fs.h:2085 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0x430/0x6b0 fs/read_write.c:590
 ksys_write+0xeb/0x1a0 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_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x59/0x120 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x000000002441bbeb -> 0x000000002dcb23ee

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 22694 Comm: syz-executor.4 Tainted: G        W          6.7.0-syzkaller-01727-gab27740f7665 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
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