1 TITLE: BUG: still has locks held in pipe_lock 2 3 [ 80.586804] ===================================== 4 [ 734.270366] [ BUG: syz-executor/31761 still has locks held! ] 5 [ 734.307462] 4.8.0+ #30 Not tainted 6 [ 734.325126] ------------------------------------- 7 [ 734.417271] 1 lock held by syz-executor/31761: 8 [ 734.442178] #0: (&pipe->mutex/1){+.+.+.}, at: [<ffffffff81844c6b>] pipe_lock+0x5b/0x70 9 [ 734.451474] 10 [ 734.451474] stack backtrace: 11 [ 734.521109] CPU: 0 PID: 31761 Comm: syz-executor Not tainted 4.8.0+ #30 12 [ 734.527900] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 13 [ 734.537256] ffff8800458dfa38 ffffffff82d383a9 ffffffff00000000 fffffbfff1097248 14 [ 734.545358] ffff88005639a700 ffff88005639a700 dffffc0000000000 ffff88005639a700 15 [ 734.553482] ffff8800530148f8 ffff8800458dfa58 ffffffff81463cb5 0000000000000000 16 [ 734.562654] Call Trace: 17 [ 734.565257] [<ffffffff82d383a9>] dump_stack+0x12e/0x185 18 [ 734.570819] [<ffffffff81463cb5>] debug_check_no_locks_held+0x125/0x140 19 [ 734.577590] [<ffffffff860bae47>] unix_stream_read_generic+0x1317/0x1b70 20 [ 734.584440] [<ffffffff860b9b30>] ? unix_getname+0x290/0x290 21 [ 734.590238] [<ffffffff8146870b>] ? __lock_acquire+0x7fb/0x3410 22 [ 734.596306] [<ffffffff81467f10>] ? debug_check_no_locks_freed+0x3c0/0x3c0 23 [ 734.603322] [<ffffffff81905282>] ? fsnotify+0xca2/0x1020 24 [ 734.608874] [<ffffffff81467f10>] ? debug_check_no_locks_freed+0x3c0/0x3c0 25 [ 734.615894] [<ffffffff814475b0>] ? prepare_to_wait_event+0x450/0x450 26 [ 734.622486] [<ffffffff860bb7fb>] unix_stream_splice_read+0x15b/0x1d0 27 [ 734.629066] [<ffffffff860bb6a0>] ? unix_stream_read_generic+0x1b70/0x1b70 28 [ 734.636086] [<ffffffff82b27c3a>] ? common_file_perm+0x15a/0x3a0 29 [ 734.642242] [<ffffffff860b52f0>] ? unix_accept+0x460/0x460 30 [ 734.647963] [<ffffffff82a5c02e>] ? security_file_permission+0x8e/0x1e0 31 [ 734.654729] [<ffffffff860bb6a0>] ? unix_stream_read_generic+0x1b70/0x1b70 32 [ 734.661754] [<ffffffff85afc54e>] sock_splice_read+0xbe/0x100 33 [ 734.667649] [<ffffffff85afc490>] ? kernel_sock_shutdown+0x80/0x80 34 [ 734.673973] [<ffffffff818d11ff>] do_splice_to+0x10f/0x170 35 [ 734.679697] [<ffffffff818d6acc>] SyS_splice+0x114c/0x15b0 36 [ 734.685329] [<ffffffff81506bf4>] ? SyS_futex+0x144/0x2e0 37 [ 734.690961] [<ffffffff818d5980>] ? compat_SyS_vmsplice+0x250/0x250 38 [ 734.697375] [<ffffffff8146750c>] ? trace_hardirqs_on_caller+0x44c/0x5e0 39 [ 734.704230] [<ffffffff8100501a>] ? trace_hardirqs_on_thunk+0x1a/0x1c 40 [ 734.710821] [<ffffffff86da6d05>] entry_SYSCALL_64_fastpath+0x23/0xc6 41 [ 734.717436] [<ffffffff816939e7>] ? perf_event_mmap+0x77/0xb20 42
