[....] 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. [ 29.398054] kauditd_printk_skb: 8 callbacks suppressed [ 29.398065] audit: type=1800 audit(1540931695.249:29): pid=5573 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 29.424702] audit: type=1800 audit(1540931695.249:30): pid=5573 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.0.12' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.852194] kasan: CONFIG_KASAN_INLINE enabled [ 43.857077] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 43.864443] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 43.870799] CPU: 0 PID: 5728 Comm: syz-executor006 Not tainted 4.19.0+ #88 [ 43.877805] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.887165] RIP: 0010:vb2_vmalloc_put_userptr+0x73/0x250 [ 43.892602] 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 [ 43.911598] RSP: 0018:ffff8801d2d77408 EFLAGS: 00010202 [ 43.917076] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffffffff113e0ac [ 43.924341] RDX: 0000000000000001 RSI: ffffffff854c11d9 RDI: 0000000000000009 [ 43.931610] RBP: ffff8801d2d77438 R08: ffff8801d4b246c0 R09: ffffed003a5d044e [ 43.938883] R10: ffff8801d2d77530 R11: ffff8801d2e82277 R12: ffffc90002551000 [ 43.946156] R13: 0000000000000000 R14: ffff8801cec5f380 R15: ffff8801cec5f380 [ 43.953533] FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 43.961781] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.967659] CR2: 000000000043e910 CR3: 000000000946a000 CR4: 00000000001406f0 [ 43.974925] Call Trace: [ 43.977582] __vb2_queue_free+0x4b1/0xa30 [ 43.981730] ? vb2_vmalloc_detach_dmabuf+0x80/0x80 [ 43.986687] ? __vb2_plane_dmabuf_put.isra.6+0x310/0x310 [ 43.992231] ? vidioc_querycap+0x110/0x110 [ 43.996463] ? dev_debug_store+0x140/0x140 [ 44.000701] vb2_core_queue_release+0x62/0x80 [ 44.005193] vb2_queue_release+0x15/0x20 [ 44.009255] v4l2_m2m_ctx_release+0x1e/0x35 [ 44.013576] vicodec_release+0xbd/0x120 [ 44.017608] v4l2_release+0xfb/0x1a0 [ 44.021322] __fput+0x385/0xa30 [ 44.024601] ? get_max_files+0x20/0x20 [ 44.028498] ? trace_hardirqs_on+0xbd/0x310 [ 44.032825] ? kasan_check_read+0x11/0x20 [ 44.036975] ? task_work_run+0x1af/0x2a0 [ 44.041034] ? trace_hardirqs_off_caller+0x310/0x310 [ 44.046149] ____fput+0x15/0x20 [ 44.049436] task_work_run+0x1e8/0x2a0 [ 44.053379] ? task_work_cancel+0x240/0x240 [ 44.057714] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 44.063275] ? switch_task_namespaces+0x9d/0xd0 [ 44.067946] do_exit+0x1ad6/0x26d0 [ 44.071488] ? mm_update_next_owner+0x990/0x990 [ 44.076252] ? kvfree+0x66/0x70 [ 44.079530] ? video_usercopy+0x79b/0x1760 [ 44.083787] ? v4l_s_fmt+0x990/0x990 [ 44.087499] ? v4l_enumstd+0x70/0x70 [ 44.091213] ? rcu_softirq_qs+0x20/0x20 [ 44.095191] ? is_bpf_text_address+0xd3/0x170 [ 44.099688] ? __kernel_text_address+0xd/0x40 [ 44.104183] ? unwind_get_return_address+0x61/0xa0 [ 44.109111] ? __save_stack_trace+0x8d/0xf0 [ 44.113435] ? smk_access+0x53b/0x700 [ 44.117238] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.122792] ? smack_log+0x423/0x590 [ 44.126509] ? smk_access_entry+0x310/0x310 [ 44.130835] ? trace_hardirqs_off+0xb8/0x310 [ 44.135245] ? smk_tskacc+0x3dd/0x520 [ 44.139052] ? video_usercopy+0x1760/0x1760 [ 44.143368] ? video_ioctl2+0x2c/0x33 [ 44.147167] ? v4l2_ioctl+0x15c/0x1b0 [ 44.150964] ? video_devdata+0xa0/0xa0 [ 44.155088] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.160625] ? do_vfs_ioctl+0x201/0x1720 [ 44.164683] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 44.170339] ? ioctl_preallocate+0x300/0x300 [ 44.174770] ? smk_curacc+0x7f/0xa0 [ 44.178685] ? smack_file_ioctl+0x210/0x3c0 [ 44.183010] ? fget_raw+0x20/0x20 [ 44.186462] ? smack_file_lock+0x2e0/0x2e0 [ 44.190696] ? rcu_read_lock_sched_held+0x14f/0x180 [ 44.195807] do_group_exit+0x177/0x440 [ 44.199695] ? trace_hardirqs_on+0xbd/0x310 [ 44.204133] ? __ia32_sys_exit+0x50/0x50 [ 44.208247] ? trace_hardirqs_off_caller+0x310/0x310 [ 44.213350] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.218886] ? ksys_ioctl+0x81/0xd0 [ 44.222513] __x64_sys_exit_group+0x3e/0x50 [ 44.227044] do_syscall_64+0x1b9/0x820 [ 44.230933] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 44.236296] ? syscall_return_slowpath+0x5e0/0x5e0 [ 44.241221] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.246075] ? trace_hardirqs_on_caller+0x310/0x310 [ 44.251234] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 44.256251] ? prepare_exit_to_usermode+0x291/0x3b0 [ 44.261268] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.266253] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.271438] RIP: 0033:0x442d98 [ 44.274636] Code: Bad RIP value. [ 44.277999] RSP: 002b:00007ffc32d53f78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 44.285706] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442d98 [ 44.292972] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 44.300239] RBP: 00000000004c2968 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 44.307506] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 44.314794] R13: 00000000006d4180 R14: 0000000000000000 R15: 0000000000000000 [ 44.322060] Modules linked in: [ 44.325777] ---[ end trace 894fb90190094ea9 ]--- [ 44.330595] RIP: 0010:vb2_vmalloc_put_userptr+0x73/0x250 [ 44.336091] 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 [ 44.355029] RSP: 0018:ffff8801d2d77408 EFLAGS: 00010202 [ 44.360638] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffffffff113e0ac [ 44.367942] RDX: 0000000000000001 RSI: ffffffff854c11d9 RDI: 0000000000000009 [ 44.375211] RBP: ffff8801d2d77438 R08: ffff8801d4b246c0 R09: ffffed003a5d044e [ 44.382565] R10: ffff8801d2d77530 R11: ffff8801d2e82277 R12: ffffc90002551000 [ 44.389865] R13: 0000000000000000 R14: ffff8801cec5f380 R15: ffff8801cec5f380 [ 44.397177] FS: 000000000073c880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 44.405414] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.411325] CR2: 0000000000442d6e CR3: 000000000946a000 CR4: 00000000001406f0 [ 44.418628] Kernel panic - not syncing: Fatal exception [ 44.425283] Kernel Offset: disabled [ 44.428919] Rebooting in 86400 seconds..