forked to background, child pid 3173 no interfaces have a carrier [ 21.246191][ T3174] 8021q: adding VLAN 0 to HW filter on device bond0 [ 21.262082][ T3174] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.25' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 45.998928][ T3596] [ 46.002137][ T3596] ============================================ [ 46.008261][ T3596] WARNING: possible recursive locking detected [ 46.014384][ T3596] 5.17.0-rc8-syzkaller-00003-g56e337f2cf13 #0 Not tainted [ 46.021464][ T3596] -------------------------------------------- [ 46.028021][ T3596] syz-executor298/3596 is trying to acquire lock: [ 46.034408][ T3596] ffff88807cc5d468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_write+0x132/0x1c00 [ 46.043220][ T3596] [ 46.043220][ T3596] but task is already holding lock: [ 46.050581][ T3596] ffff88807cc5d868 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_wait_readable+0x39b/0x420 [ 46.059974][ T3596] [ 46.059974][ T3596] other info that might help us debug this: [ 46.068010][ T3596] Possible unsafe locking scenario: [ 46.068010][ T3596] [ 46.075439][ T3596] CPU0 [ 46.078696][ T3596] ---- [ 46.081966][ T3596] lock(&pipe->mutex/1); [ 46.086281][ T3596] lock(&pipe->mutex/1); [ 46.090594][ T3596] [ 46.090594][ T3596] *** DEADLOCK *** [ 46.090594][ T3596] [ 46.098720][ T3596] May be due to missing lock nesting notation [ 46.098720][ T3596] [ 46.107014][ T3596] 1 lock held by syz-executor298/3596: [ 46.112444][ T3596] #0: ffff88807cc5d868 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_wait_readable+0x39b/0x420 [ 46.122522][ T3596] [ 46.122522][ T3596] stack backtrace: [ 46.128642][ T3596] CPU: 1 PID: 3596 Comm: syz-executor298 Not tainted 5.17.0-rc8-syzkaller-00003-g56e337f2cf13 #0 [ 46.140002][ T3596] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.150917][ T3596] Call Trace: [ 46.155562][ T3596] [ 46.158994][ T3596] dump_stack_lvl+0xcd/0x134 [ 46.164365][ T3596] __lock_acquire.cold+0x213/0x3a9 [ 46.172203][ T3596] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 46.178757][ T3596] lock_acquire+0x1ab/0x510 [ 46.183245][ T3596] ? pipe_write+0x132/0x1c00 [ 46.187833][ T3596] ? lock_release+0x720/0x720 [ 46.192489][ T3596] __mutex_lock+0x12f/0x12f0 [ 46.197058][ T3596] ? pipe_write+0x132/0x1c00 [ 46.201641][ T3596] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 46.207718][ T3596] ? pipe_write+0x132/0x1c00 [ 46.212486][ T3596] ? mutex_lock_io_nested+0x1150/0x1150 [ 46.218040][ T3596] ? find_held_lock+0x2d/0x110 [ 46.222875][ T3596] ? aa_file_perm+0x56b/0x1230 [ 46.227633][ T3596] ? lock_downgrade+0x6e0/0x6e0 [ 46.232478][ T3596] pipe_write+0x132/0x1c00 [ 46.237152][ T3596] ? aa_file_perm+0x595/0x1230 [ 46.241895][ T3596] ? generic_pipe_buf_release+0x240/0x240 [ 46.247592][ T3596] ? aa_path_link+0x2f0/0x2f0 [ 46.252257][ T3596] ? mutex_lock_io_nested+0x1150/0x1150 [ 46.257784][ T3596] ? pipe_wait_readable+0x336/0x420 [ 46.262958][ T3596] ? lock_downgrade+0x6e0/0x6e0 [ 46.267802][ T3596] do_iter_readv_writev+0x47a/0x750 [ 46.272980][ T3596] ? new_sync_write+0x660/0x660 [ 46.277983][ T3596] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 46.284568][ T3596] ? security_file_permission+0xab/0xd0 [ 46.290118][ T3596] do_iter_write+0x188/0x710 [ 46.294701][ T3596] vfs_iter_write+0x70/0xa0 [ 46.299181][ T3596] iter_file_splice_write+0x723/0xc70 [ 46.304965][ T3596] ? generic_splice_sendpage+0x140/0x140 [ 46.310580][ T3596] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 46.317088][ T3596] ? security_file_permission+0xab/0xd0 [ 46.322614][ T3596] ? generic_splice_sendpage+0x140/0x140 [ 46.328239][ T3596] do_splice+0xb7e/0x1960 [ 46.332620][ T3596] ? find_held_lock+0x2d/0x110 [ 46.337383][ T3596] ? __fget_files+0x26a/0x470 [ 46.342056][ T3596] ? splice_file_to_pipe+0x120/0x120 [ 46.347440][ T3596] ? find_held_lock+0x2d/0x110 [ 46.352190][ T3596] __do_splice+0x134/0x250 [ 46.356580][ T3596] ? do_splice+0x1960/0x1960 [ 46.361237][ T3596] __x64_sys_splice+0x198/0x250 [ 46.366078][ T3596] do_syscall_64+0x35/0xb0 [ 46.370493][ T3596] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 46.376359][ T3596] RIP: 0033:0x7f643eb28ca9 [ 46.380751][ T3596] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 81 14 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 46.402071][ T3596] RSP: 002b:00007f643eadb308 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 [ 46.410469][ T3596] RAX: ffffffffffffffda RBX: 00007f643ebb1408 RCX: 00007f643eb28ca9 [ 46.419630][ T3596] RDX: 0000000000000006 RSI: 0000000000000000 RDI: 0000000000000003 [ 46.427576][ T3596] RBP: 00007f643ebb1400 R08: 00000000000001ff R09: 0000000000000000 [ 46.435537][ T3596] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f643ebb140c [ 46.443586][ T3596] R13: 00007fff93bb49ff R14: 00007f643eadb400 R15: 0000000000022000