================================================================== BUG: KCSAN: data-race in pipe_wait / put_pipe_info read to 0xffff88808fc92e8c of 4 bytes by task 29559 on cpu 0: pipe_lock_nested fs/pipe.c:62 [inline] pipe_lock fs/pipe.c:71 [inline] pipe_wait+0xd7/0x140 fs/pipe.c:119 splice_from_pipe_next.part.0+0x6c/0x1d0 fs/splice.c:564 splice_from_pipe_next fs/splice.c:543 [inline] __splice_from_pipe+0xa4/0x480 fs/splice.c:622 splice_from_pipe+0xbb/0x100 fs/splice.c:659 generic_splice_sendpage+0x45/0x60 fs/splice.c:829 do_splice_from fs/splice.c:848 [inline] do_splice+0x497/0xbe0 fs/splice.c:1155 __do_sys_splice fs/splice.c:1425 [inline] __se_sys_splice fs/splice.c:1405 [inline] __x64_sys_splice+0x20a/0x220 fs/splice.c:1405 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff88808fc92e8c of 4 bytes by task 29558 on cpu 1: put_pipe_info+0x4d/0xb0 fs/pipe.c:575 pipe_release+0x152/0x1b0 fs/pipe.c:603 __fput+0x1e1/0x520 fs/file_table.c:280 ____fput+0x1f/0x30 fs/file_table.c:313 task_work_run+0xf6/0x130 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x2b4/0x2c0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x353/0x370 arch/x86/entry/common.c:300 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 29558 Comm: syz-executor.4 Not tainted 5.4.0-rc3+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================