KCSAN: data-race in opipe_prep / pipe

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in opipe_prep / pipe_write (2) fs	6				1	1362d	1362d	0/29	auto-closed as invalid on 2022/03/11 16:40
upstream	KCSAN: data-race in opipe_prep / pipe_write (3) fs	6				1	1007d	1007d	0/29	auto-obsoleted due to no activity on 2023/04/06 01:17

================================================================== BUG: KCSAN: data-race in opipe_prep / pipe_write write to 0xffff88810829b290 of 4 bytes by task 21549 on cpu 1: pipe_write+0x441/0xcd0 fs/pipe.c:517 call_write_iter include/linux/fs.h:2114 [inline] new_sync_write fs/read_write.c:518 [inline] vfs_write+0x69d/0x770 fs/read_write.c:605 ksys_write+0xce/0x180 fs/read_write.c:658 __do_sys_write fs/read_write.c:670 [inline] __se_sys_write fs/read_write.c:667 [inline] __x64_sys_write+0x3e/0x50 fs/read_write.c:667 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff88810829b290 of 4 bytes by task 21550 on cpu 0: opipe_prep+0x26/0x200 fs/splice.c:1407 splice_pipe_to_pipe fs/splice.c:1454 [inline] do_splice+0x2ee/0xd30 fs/splice.c:1054 __do_splice fs/splice.c:1144 [inline] __do_sys_splice fs/splice.c:1350 [inline] __se_sys_splice+0x2a6/0x390 fs/splice.c:1332 __x64_sys_splice+0x74/0x80 fs/splice.c:1332 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x00000010 -> 0x0000001f Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 21550 Comm: syz-executor.1 Tainted: G W 5.14.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================