[info] Using makefile-style concurrent boot in runlevel 2. [ 26.465087] audit: type=1800 audit(1543824121.441:21): pid=5879 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.228' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program syzkaller login: [ 41.166075] ------------[ cut here ]------------ [ 41.170884] DEBUG_LOCKS_WARN_ON(depth <= 0) [ 41.170961] WARNING: CPU: 1 PID: 6052 at kernel/locking/lockdep.c:3595 lock_release+0x740/0xa10 [ 41.184141] Kernel panic - not syncing: panic_on_warn set ... [ 41.190008] CPU: 1 PID: 6052 Comm: syz-executor846 Not tainted 4.20.0-rc1-next-20181109+ #110 [ 41.198655] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.207995] Call Trace: [ 41.210567] dump_stack+0x244/0x39d [ 41.214174] ? dump_stack_print_info.cold.1+0x20/0x20 [ 41.219350] panic+0x2ad/0x55c [ 41.222535] ? add_taint.cold.5+0x16/0x16 [ 41.226674] ? __warn.cold.8+0x5/0x45 [ 41.230466] ? __warn+0xe8/0x1d0 [ 41.233816] ? lock_release+0x740/0xa10 [ 41.237858] __warn.cold.8+0x20/0x45 [ 41.241552] ? lock_release+0x740/0xa10 [ 41.245532] report_bug+0x254/0x2d0 [ 41.249143] do_error_trap+0x11b/0x200 [ 41.253013] do_invalid_op+0x36/0x40 [ 41.256716] ? lock_release+0x740/0xa10 [ 41.260672] invalid_op+0x14/0x20 [ 41.264112] RIP: 0010:lock_release+0x740/0xa10 [ 41.269306] Code: 03 38 d0 7c 08 84 d2 0f 85 da 02 00 00 8b 35 a7 95 b3 08 85 f6 75 15 48 c7 c6 20 66 2b 88 48 c7 c7 c0 33 2b 88 e8 10 36 e7 ff <0f> 0b 48 8b 95 e8 fe ff ff 4c 89 f7 48 8b b5 f0 fe ff ff e8 e8 58 [ 41.288234] RSP: 0018:ffff8801b23ef868 EFLAGS: 00010086 [ 41.293576] RAX: 0000000000000000 RBX: 1ffff1003647df12 RCX: 0000000000000000 [ 41.300828] RDX: 0000000000000000 RSI: ffffffff8165ba15 RDI: 0000000000000006 [ 41.308078] RBP: ffff8801b23ef998 R08: ffff8801bc5b0440 R09: fffffbfff12b2254 [ 41.315330] R10: fffffbfff12b2254 R11: ffffffff895912a3 R12: ffffffff8b0e27a0 [ 41.322696] R13: ffff8801b23ef970 R14: ffff8801bc5b0440 R15: ffff8801b23ef8b0 [ 41.329958] ? vprintk_func+0x85/0x181 [ 41.333831] ? lock_release+0x740/0xa10 [ 41.337790] ? loop_control_ioctl+0xf5/0x4e0 [ 41.342179] ? lock_downgrade+0x900/0x900 [ 41.346309] ? __radix_tree_lookup+0x3a7/0x500 [ 41.350872] ? radix_tree_insert+0x870/0x870 [ 41.355268] ? find_held_lock+0x36/0x1c0 [ 41.359316] __mutex_unlock_slowpath+0x102/0x8c0 [ 41.364051] ? __fget+0x4aa/0x740 [ 41.367485] ? wait_for_completion+0x8a0/0x8a0 [ 41.372049] ? check_preemption_disabled+0x48/0x280 [ 41.377046] ? radix_tree_lookup+0x21/0x30 [ 41.381273] ? idr_find+0x44/0x50 [ 41.384718] ? loop_lookup+0x105/0x230 [ 41.388587] ? loop_exit_cb+0x20/0x20 [ 41.392373] mutex_unlock+0xd/0x10 [ 41.395897] loop_control_ioctl+0xf5/0x4e0 [ 41.400114] ? loop_add+0xa20/0xa20 [ 41.403723] ? trace_hardirqs_off+0xb8/0x310 [ 41.408113] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.413649] ? loop_add+0xa20/0xa20 [ 41.417262] do_vfs_ioctl+0x1de/0x1790 [ 41.421135] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 41.426656] ? ioctl_preallocate+0x300/0x300 [ 41.431055] ? __fget_light+0x2e9/0x430 [ 41.435010] ? fget_raw+0x20/0x20 [ 41.438442] ? putname+0xf2/0x130 [ 41.441875] ? rcu_read_lock_sched_held+0x14f/0x180 [ 41.446871] ? kmem_cache_free+0x24f/0x290 [ 41.451089] ? __x64_sys_futex+0x47f/0x6a0 [ 41.455332] ? do_syscall_64+0x9a/0x820 [ 41.459287] ? do_syscall_64+0x9a/0x820 [ 41.463244] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 41.467813] ? security_file_ioctl+0x94/0xc0 [ 41.472227] ksys_ioctl+0xa9/0xd0 [ 41.475660] __x64_sys_ioctl+0x73/0xb0 [ 41.479621] do_syscall_64+0x1b9/0x820 [ 41.483490] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 41.488834] ? syscall_return_slowpath+0x5e0/0x5e0 [ 41.493745] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.498572] ? trace_hardirqs_on_caller+0x310/0x310 [ 41.503569] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 41.508576] ? prepare_exit_to_usermode+0x291/0x3b0 [ 41.513574] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.518399] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 41.523573] RIP: 0033:0x446239 [ 41.526750] Code: e8 2c b3 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 0f 83 2b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 41.545632] RSP: 002b:00007f0cd33bdda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 41.553320] RAX: ffffffffffffffda RBX: 00000000006dac28 RCX: 0000000000446239 [ 41.560587] RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000003 [ 41.567849] RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000 [ 41.575119] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac2c [ 41.582374] R13: 6f72746e6f632d70 R14: 6f6f6c2f7665642f R15: 00000000006dad2c [ 41.590707] Kernel Offset: disabled [ 41.594335] Rebooting in 86400 seconds..