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BUG: KCSAN: data-race in inode_needs_update_time / inode_update_timestamps

write to 0xffff888107bd98e0 of 8 bytes by task 19651 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 fs/inode.c:2550 [inline]
 inode_update_timestamps+0x30f/0x560 fs/inode.c:1897
 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:610
 call_write_iter include/linux/fs.h:2020 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x48a/0x790 fs/read_write.c:584
 ksys_write+0xeb/0x1a0 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __x64_sys_write+0x42/0x50 fs/read_write.c:646
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

read to 0xffff888107bd98e0 of 8 bytes by task 19652 on cpu 1:
 inode_get_ctime include/linux/fs.h:1591 [inline]
 inode_needs_update_time+0x223/0x2f0 fs/inode.c:2127
 file_update_time+0x2d/0x140 fs/inode.c:2170
 pipe_write+0xa81/0xd20 fs/pipe.c:610
 call_write_iter include/linux/fs.h:2020 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x48a/0x790 fs/read_write.c:584
 ksys_write+0xeb/0x1a0 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __x64_sys_write+0x42/0x50 fs/read_write.c:646
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x0000000025d53ecc -> 0x000000002bcb1fcc

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 19652 Comm: syz-executor.1 Not tainted 6.7.0-rc7-syzkaller-00041-gf016f7547aee #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
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