DUID 00:04:dc:6c:a8:75:19:b8:f7:30:df:f1:e8:1e:24:9d:66:1e forked to background, child pid 3176 [ 26.243385][ T3177] 8021q: adding VLAN 0 to HW filter on device bond0 [ 26.256489][ T3177] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.213' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 48.606670][ T3593] [ 48.609011][ T3593] ============================================ [ 48.615134][ T3593] WARNING: possible recursive locking detected [ 48.621260][ T3593] 5.17.0-rc8-syzkaller-00003-g56e337f2cf13 #0 Not tainted [ 48.628339][ T3593] -------------------------------------------- [ 48.634463][ T3593] syz-executor190/3593 is trying to acquire lock: [ 48.640847][ T3593] ffff888078020868 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_write+0x132/0x1c00 [ 48.649628][ T3593] [ 48.649628][ T3593] but task is already holding lock: [ 48.656986][ T3593] ffff888078020468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_wait_readable+0x39b/0x420 [ 48.666359][ T3593] [ 48.666359][ T3593] other info that might help us debug this: [ 48.674397][ T3593] Possible unsafe locking scenario: [ 48.674397][ T3593] [ 48.681822][ T3593] CPU0 [ 48.685077][ T3593] ---- [ 48.688343][ T3593] lock(&pipe->mutex/1); [ 48.692652][ T3593] lock(&pipe->mutex/1); [ 48.696964][ T3593] [ 48.696964][ T3593] *** DEADLOCK *** [ 48.696964][ T3593] [ 48.705083][ T3593] May be due to missing lock nesting notation [ 48.705083][ T3593] [ 48.713384][ T3593] 1 lock held by syz-executor190/3593: [ 48.718822][ T3593] #0: ffff888078020468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_wait_readable+0x39b/0x420 [ 48.728637][ T3593] [ 48.728637][ T3593] stack backtrace: [ 48.734497][ T3593] CPU: 1 PID: 3593 Comm: syz-executor190 Not tainted 5.17.0-rc8-syzkaller-00003-g56e337f2cf13 #0 [ 48.744974][ T3593] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.755004][ T3593] Call Trace: [ 48.758265][ T3593] [ 48.761175][ T3593] dump_stack_lvl+0xcd/0x134 [ 48.765763][ T3593] __lock_acquire.cold+0x213/0x3a9 [ 48.770858][ T3593] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 48.776822][ T3593] lock_acquire+0x1ab/0x510 [ 48.781306][ T3593] ? pipe_write+0x132/0x1c00 [ 48.785875][ T3593] ? lock_release+0x720/0x720 [ 48.790543][ T3593] __mutex_lock+0x12f/0x12f0 [ 48.795122][ T3593] ? pipe_write+0x132/0x1c00 [ 48.799691][ T3593] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 48.805653][ T3593] ? pipe_write+0x132/0x1c00 [ 48.810246][ T3593] ? mutex_lock_io_nested+0x1150/0x1150 [ 48.815774][ T3593] ? find_held_lock+0x2d/0x110 [ 48.820517][ T3593] ? aa_file_perm+0x56b/0x1230 [ 48.825263][ T3593] ? lock_downgrade+0x6e0/0x6e0 [ 48.830954][ T3593] pipe_write+0x132/0x1c00 [ 48.835354][ T3593] ? aa_file_perm+0x595/0x1230 [ 48.840110][ T3593] ? generic_pipe_buf_release+0x240/0x240 [ 48.845809][ T3593] ? aa_path_link+0x2f0/0x2f0 [ 48.850465][ T3593] ? mutex_lock_io_nested+0x1150/0x1150 [ 48.855989][ T3593] ? pipe_wait_readable+0x336/0x420 [ 48.861165][ T3593] ? lock_downgrade+0x6e0/0x6e0 [ 48.865998][ T3593] do_iter_readv_writev+0x47a/0x750 [ 48.871176][ T3593] ? new_sync_write+0x660/0x660 [ 48.876008][ T3593] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 48.882229][ T3593] ? security_file_permission+0xab/0xd0 [ 48.887753][ T3593] do_iter_write+0x188/0x710 [ 48.892326][ T3593] vfs_iter_write+0x70/0xa0 [ 48.896807][ T3593] iter_file_splice_write+0x723/0xc70 [ 48.902160][ T3593] ? generic_splice_sendpage+0x140/0x140 [ 48.907899][ T3593] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 48.914133][ T3593] ? security_file_permission+0xab/0xd0 [ 48.919657][ T3593] ? generic_splice_sendpage+0x140/0x140 [ 48.925272][ T3593] do_splice+0xb7e/0x1960 [ 48.929581][ T3593] ? find_held_lock+0x2d/0x110 [ 48.934326][ T3593] ? __fget_files+0x26a/0x470 [ 48.938995][ T3593] ? splice_file_to_pipe+0x120/0x120 [ 48.944257][ T3593] ? find_held_lock+0x2d/0x110 [ 48.949002][ T3593] __do_splice+0x134/0x250 [ 48.953397][ T3593] ? do_splice+0x1960/0x1960 [ 48.957970][ T3593] __x64_sys_splice+0x198/0x250 [ 48.962801][ T3593] do_syscall_64+0x35/0xb0 [ 48.967196][ T3593] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 48.973078][ T3593] RIP: 0033:0x7fb9ac14bca9 [ 48.977469][ T3593] 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 [ 48.997141][ T3593] RSP: 002b:00007fb9ac0fe308 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 [ 49.005530][ T3593] RAX: fffffff