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BUG: KCSAN: data-race in file_update_time / inode_update_timestamps

read to 0xffff888106ebc080 of 8 bytes by task 13325 on cpu 1:
 inode_get_ctime include/linux/fs.h:1595 [inline]
 inode_needs_update_time fs/inode.c:2089 [inline]
 file_update_time+0x107/0x2b0 fs/inode.c:2132
 pipe_write+0xa81/0xd20 fs/pipe.c:617
 do_iter_readv_writev+0x2b0/0x330
 vfs_writev+0x2e9/0x860 fs/read_write.c:971
 do_writev+0xf8/0x220 fs/read_write.c:1018
 __do_sys_writev fs/read_write.c:1091 [inline]
 __se_sys_writev fs/read_write.c:1088 [inline]
 __x64_sys_writev+0x45/0x50 fs/read_write.c:1088
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

write to 0xffff888106ebc080 of 8 bytes by task 13322 on cpu 0:
 inode_set_ctime_to_ts include/linux/fs.h:1601 [inline]
 inode_set_ctime include/linux/fs.h:1619 [inline]
 inode_set_ctime_current fs/inode.c:2512 [inline]
 inode_update_timestamps+0xb5/0x280 fs/inode.c:1859
 generic_update_time fs/inode.c:1898 [inline]
 inode_update_time fs/inode.c:1918 [inline]
 __file_update_time fs/inode.c:2106 [inline]
 file_update_time+0x229/0x2b0 fs/inode.c:2136
 pipe_write+0xa81/0xd20 fs/pipe.c:617
 do_iter_readv_writev+0x2b0/0x330
 vfs_writev+0x2e9/0x860 fs/read_write.c:971
 do_writev+0xf8/0x220 fs/read_write.c:1018
 __do_sys_writev fs/read_write.c:1091 [inline]
 __se_sys_writev fs/read_write.c:1088 [inline]
 __x64_sys_writev+0x45/0x50 fs/read_write.c:1088
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x00000000330429c6 -> 0x00000000005a3149

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 13322 Comm: syz-executor.3 Not tainted 6.8.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
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