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

write to 0xffff888106492c80 of 4 bytes by task 11912 on cpu 1:
 inode_set_ctime_to_ts include/linux/fs.h:1637 [inline]
 inode_set_ctime_current fs/inode.c:2591 [inline]
 inode_update_timestamps+0xaf/0x280 fs/inode.c:1923
 generic_update_time fs/inode.c:1962 [inline]
 inode_update_time fs/inode.c:1982 [inline]
 __file_update_time fs/inode.c:2171 [inline]
 file_update_time+0x229/0x2c0 fs/inode.c:2201
 pipe_write+0xa87/0xd30 fs/pipe.c:607
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0x78f/0x900 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
 x64_sys_call+0x27dd/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888106492c80 of 4 bytes by task 11916 on cpu 0:
 inode_get_ctime_nsec include/linux/fs.h:1622 [inline]
 inode_get_ctime include/linux/fs.h:1628 [inline]
 inode_needs_update_time fs/inode.c:2154 [inline]
 file_update_time+0x104/0x2c0 fs/inode.c:2197
 pipe_write+0xa87/0xd30 fs/pipe.c:607
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0x78f/0x900 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
 x64_sys_call+0x27dd/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x10a1278a -> 0x1e56ad0f

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 11916 Comm: syz.1.2266 Not tainted 6.11.0-rc3-syzkaller-00013-g6b0f8db921ab #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
==================================================================