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BUG: KCSAN: data-race in inode_needs_update_time / inode_update_timestamps

read to 0xffff88810635a2f0 of 8 bytes by task 8570 on cpu 0:
 inode_get_ctime include/linux/fs.h:1522 [inline]
 inode_needs_update_time+0x223/0x2f0 fs/inode.c:2118
 file_update_time+0x2d/0x140 fs/inode.c:2161
 pipe_write+0xb0c/0xde0 fs/pipe.c:601
 do_iter_write+0x4b4/0x7b0 fs/read_write.c:860
 vfs_writev+0x1a8/0x320 fs/read_write.c:933
 do_writev+0xf8/0x220 fs/read_write.c:976
 __do_sys_writev fs/read_write.c:1049 [inline]
 __se_sys_writev fs/read_write.c:1046 [inline]
 __x64_sys_writev+0x45/0x50 fs/read_write.c:1046
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

write to 0xffff88810635a2f0 of 8 bytes by task 8557 on cpu 1:
 inode_set_ctime_to_ts include/linux/fs.h:1535 [inline]
 inode_set_ctime include/linux/fs.h:1553 [inline]
 inode_set_ctime_current fs/inode.c:2541 [inline]
 inode_update_timestamps+0x2db/0x530 fs/inode.c:1892
 generic_update_time fs/inode.c:1929 [inline]
 inode_update_time fs/inode.c:1949 [inline]
 __file_update_time fs/inode.c:2135 [inline]
 file_update_time+0xba/0x140 fs/inode.c:2165
 pipe_write+0xb0c/0xde0 fs/pipe.c:601
 do_iter_write+0x4b4/0x7b0 fs/read_write.c:860
 vfs_writev+0x1a8/0x320 fs/read_write.c:933
 do_writev+0xf8/0x220 fs/read_write.c:976
 __do_sys_writev fs/read_write.c:1049 [inline]
 __se_sys_writev fs/read_write.c:1046 [inline]
 __x64_sys_writev+0x45/0x50 fs/read_write.c:1046
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x000000002e11a795 -> 0x0000000039fd6998

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 8557 Comm: syz-executor.0 Not tainted 6.6.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
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