[....] 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. [ 26.757511] kauditd_printk_skb: 7 callbacks suppressed [ 26.757523] audit: type=1800 audit(1541045993.130:29): pid=5511 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 26.790216] audit: type=1800 audit(1541045993.130:30): pid=5511 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.16' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 53.682942] kasan: CONFIG_KASAN_INLINE enabled [ 53.687641] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 53.695063] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 53.701313] CPU: 0 PID: 5666 Comm: syz-executor211 Not tainted 4.19.0+ #313 [ 53.708410] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.717792] RIP: 0010:vb2_vmalloc_put_userptr+0x73/0x250 [ 53.723254] Code: fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 c2 01 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5e 08 48 8d 7b 09 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 72 01 00 00 [ 53.742170] RSP: 0018:ffff8801d58cf408 EFLAGS: 00010202 [ 53.747533] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffffffff113e16c [ 53.754790] RDX: 0000000000000001 RSI: ffffffff854c62c9 RDI: 0000000000000009 [ 53.762045] RBP: ffff8801d58cf438 R08: ffff8801b6d9e540 R09: ffffed003ae40936 [ 53.769302] R10: ffff8801d58cf530 R11: ffff8801d72049b7 R12: ffffc90002559000 [ 53.776555] R13: 0000000000000000 R14: ffff8801d593e980 R15: ffff8801d593e980 [ 53.783814] FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 53.792025] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 53.797889] CR2: 000000000043e910 CR3: 000000000946a000 CR4: 00000000001406f0 [ 53.805147] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 53.812414] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 53.819666] Call Trace: [ 53.822253] __vb2_queue_free+0x4b1/0xa30 [ 53.826430] ? vb2_vmalloc_detach_dmabuf+0x80/0x80 [ 53.831342] ? __vb2_plane_dmabuf_put.isra.6+0x310/0x310 [ 53.836795] ? vidioc_querycap+0x110/0x110 [ 53.841014] ? dev_debug_store+0x140/0x140 [ 53.845236] vb2_core_queue_release+0x62/0x80 [ 53.849714] vb2_queue_release+0x15/0x20 [ 53.853759] v4l2_m2m_ctx_release+0x1e/0x35 [ 53.858062] vicodec_release+0xbd/0x120 [ 53.862020] v4l2_release+0xfb/0x1a0 [ 53.865721] __fput+0x385/0xa30 [ 53.869011] ? get_max_files+0x20/0x20 [ 53.872884] ? trace_hardirqs_on+0xbd/0x310 [ 53.877187] ? kasan_check_read+0x11/0x20 [ 53.881315] ? task_work_run+0x1af/0x2a0 [ 53.885361] ? trace_hardirqs_off_caller+0x310/0x310 [ 53.890452] ____fput+0x15/0x20 [ 53.893717] task_work_run+0x1e8/0x2a0 [ 53.897590] ? task_work_cancel+0x240/0x240 [ 53.901893] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 53.907430] ? switch_task_namespaces+0x9d/0xd0 [ 53.912085] do_exit+0x1ad6/0x26d0 [ 53.915613] ? mm_update_next_owner+0x990/0x990 [ 53.920283] ? kvfree+0x66/0x70 [ 53.923546] ? video_usercopy+0x79b/0x1760 [ 53.927775] ? v4l_s_fmt+0x990/0x990 [ 53.931475] ? v4l_enumstd+0x70/0x70 [ 53.935169] ? rcu_softirq_qs+0x20/0x20 [ 53.939132] ? is_bpf_text_address+0xd3/0x170 [ 53.943616] ? __kernel_text_address+0xd/0x40 [ 53.948106] ? unwind_get_return_address+0x61/0xa0 [ 53.953023] ? __save_stack_trace+0x8d/0xf0 [ 53.957346] ? save_stack+0x43/0xd0 [ 53.960957] ? __kasan_slab_free+0x102/0x150 [ 53.965347] ? kasan_slab_free+0xe/0x10 [ 53.969302] ? kmem_cache_free+0x83/0x290 [ 53.973435] ? do_sys_open+0x54d/0x700 [ 53.977332] ? __x64_sys_open+0x7e/0xc0 [ 53.981319] ? do_syscall_64+0x1b9/0x820 [ 53.985366] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.990724] ? trace_hardirqs_off+0xb8/0x310 [ 53.995117] ? kasan_check_read+0x11/0x20 [ 53.999250] ? do_raw_spin_unlock+0xa7/0x330 [ 54.003643] ? trace_hardirqs_on+0x310/0x310 [ 54.008035] ? video_usercopy+0x1760/0x1760 [ 54.012339] ? video_ioctl2+0x2c/0x33 [ 54.016122] ? v4l2_ioctl+0x15c/0x1b0 [ 54.019906] ? video_devdata+0xa0/0xa0 [ 54.023783] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.029304] ? do_vfs_ioctl+0x201/0x1720 [ 54.033361] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 54.038888] ? ioctl_preallocate+0x300/0x300 [ 54.043312] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.048836] ? __fget_light+0x2e9/0x430 [ 54.052794] ? fget_raw+0x20/0x20 [ 54.056230] ? rcu_read_lock_sched_held+0x14f/0x180 [ 54.061227] ? kmem_cache_free+0x24f/0x290 [ 54.065449] ? putname+0xf7/0x130 [ 54.068888] do_group_exit+0x177/0x440 [ 54.072764] ? trace_hardirqs_on+0xbd/0x310 [ 54.077067] ? __ia32_sys_exit+0x50/0x50 [ 54.081108] ? trace_hardirqs_off_caller+0x310/0x310 [ 54.086195] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.091712] ? ksys_ioctl+0x81/0xd0 [ 54.095336] __x64_sys_exit_group+0x3e/0x50 [ 54.099643] do_syscall_64+0x1b9/0x820 [ 54.103517] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 54.108877] ? syscall_return_slowpath+0x5e0/0x5e0 [ 54.113790] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 54.118616] ? trace_hardirqs_on_caller+0x310/0x310 [ 54.123630] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 54.128629] ? prepare_exit_to_usermode+0x291/0x3b0 [ 54.133630] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 54.140195] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.145374] RIP: 0033:0x442d98 [ 54.148564] Code: Bad RIP value. [ 54.151909] RSP: 002b:00007ffc06e59a88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 54.159601] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442d98 [ 54.166870] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 54.174122] RBP: 00000000004c2968 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 54.181370] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 54.188633] R13: 00000000006d4180 R14: 0000000000000000 R15: 0000000000000000 [ 54.195887] Modules linked in: [ 54.199593] ---[ end trace 0e898ba46dd1a210 ]--- [ 54.204538] RIP: 0010:vb2_vmalloc_put_userptr+0x73/0x250 [ 54.209992] Code: fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 c2 01 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5e 08 48 8d 7b 09 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 72 01 00 00 [ 54.228915] RSP: 0018:ffff8801d58cf408 EFLAGS: 00010202 [ 54.234293] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffffffff113e16c [ 54.241554] RDX: 0000000000000001 RSI: ffffffff854c62c9 RDI: 0000000000000009 [ 54.248844] RBP: ffff8801d58cf438 R08: ffff8801b6d9e540 R09: ffffed003ae40936 [ 54.256131] R10: ffff8801d58cf530 R11: ffff8801d72049b7 R12: ffffc90002559000 [ 54.263444] R13: 0000000000000000 R14: ffff8801d593e980 R15: ffff8801d593e980 [ 54.270717] FS: 00000000007c6880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 54.278959] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 54.284854] CR2: 0000000000442d6e CR3: 000000000946a000 CR4: 00000000001406f0 [ 54.292110] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 54.299412] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 54.306698] Kernel panic - not syncing: Fatal exception [ 54.313001] Kernel Offset: disabled [ 54.316625] Rebooting in 86400 seconds..