[....] 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. [ 27.636354] kauditd_printk_skb: 8 callbacks suppressed [ 27.636367] audit: type=1800 audit(1541194712.587:29): pid=5563 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 [ 27.666312] audit: type=1800 audit(1541194712.587:30): pid=5563 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 '10.128.0.38' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 55.334685] kasan: CONFIG_KASAN_INLINE enabled [ 55.339864] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 55.347299] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 55.353534] CPU: 0 PID: 5720 Comm: syz-executor046 Not tainted 4.19.0+ #316 [ 55.360622] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.369971] RIP: 0010:vb2_vmalloc_put_userptr+0x73/0x250 [ 55.375495] 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 [ 55.394431] RSP: 0018:ffff8801ba6af3a0 EFLAGS: 00010202 [ 55.399832] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffffffff113e4b8 [ 55.407088] RDX: 0000000000000001 RSI: ffffffff854de1a9 RDI: 0000000000000009 [ 55.414339] RBP: ffff8801ba6af3d0 R08: ffff8801b6840340 R09: ffffed0039758cba [ 55.421590] R10: ffff8801ba6af4c8 R11: ffff8801cbac65d7 R12: ffffc90002551000 [ 55.428841] R13: 0000000000000000 R14: ffff8801d7e3b180 R15: ffff8801d7e3b180 [ 55.436092] FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 55.444299] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 55.450161] CR2: 00005555f987a0d0 CR3: 000000000946a000 CR4: 00000000001406f0 [ 55.457427] Call Trace: [ 55.460015] __vb2_queue_free+0x4b1/0xa30 [ 55.464176] ? vb2_vmalloc_detach_dmabuf+0x80/0x80 [ 55.469095] ? __vb2_plane_dmabuf_put.isra.5+0x310/0x310 [ 55.474541] vb2_core_queue_release+0x62/0x80 [ 55.479029] _vb2_fop_release+0x1d2/0x2b0 [ 55.483168] vb2_fop_release+0x77/0xc0 [ 55.487042] vivid_fop_release+0x18e/0x440 [ 55.491266] ? vivid_remove+0x460/0x460 [ 55.495226] v4l2_release+0x224/0x3a0 [ 55.499008] ? dev_debug_store+0x140/0x140 [ 55.503227] __fput+0x385/0xa30 [ 55.506493] ? get_max_files+0x20/0x20 [ 55.510363] ? trace_hardirqs_on+0xbd/0x310 [ 55.514667] ? kasan_check_read+0x11/0x20 [ 55.518817] ? task_work_run+0x1af/0x2a0 [ 55.522857] ? trace_hardirqs_off_caller+0x310/0x310 [ 55.527945] ____fput+0x15/0x20 [ 55.531230] task_work_run+0x1e8/0x2a0 [ 55.535126] ? task_work_cancel+0x240/0x240 [ 55.539433] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 55.544959] ? switch_task_namespaces+0x9d/0xd0 [ 55.549654] do_exit+0x1ad6/0x26d0 [ 55.553198] ? mm_update_next_owner+0x990/0x990 [ 55.557852] ? kvfree+0x66/0x70 [ 55.561115] ? video_usercopy+0x79b/0x1760 [ 55.565334] ? v4l_s_fmt+0x990/0x990 [ 55.569030] ? v4l_enumstd+0x70/0x70 [ 55.572734] ? rcu_softirq_qs+0x20/0x20 [ 55.576694] ? is_bpf_text_address+0xd3/0x170 [ 55.581172] ? __kernel_text_address+0xd/0x40 [ 55.585650] ? unwind_get_return_address+0x61/0xa0 [ 55.590562] ? __save_stack_trace+0x8d/0xf0 [ 55.594869] ? save_stack+0x43/0xd0 [ 55.598482] ? __kasan_slab_free+0x102/0x150 [ 55.602873] ? kasan_slab_free+0xe/0x10 [ 55.606828] ? kmem_cache_free+0x83/0x290 [ 55.610956] ? do_sys_open+0x54d/0x700 [ 55.614822] ? __x64_sys_open+0x7e/0xc0 [ 55.618836] ? do_syscall_64+0x1b9/0x820 [ 55.622898] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 55.628247] ? trace_hardirqs_off+0xb8/0x310 [ 55.632639] ? kasan_check_read+0x11/0x20 [ 55.636774] ? do_raw_spin_unlock+0xa7/0x330 [ 55.641173] ? trace_hardirqs_on+0x310/0x310 [ 55.645569] ? video_usercopy+0x1760/0x1760 [ 55.649874] ? video_ioctl2+0x2c/0x33 [ 55.653658] ? v4l2_ioctl+0x15c/0x1b0 [ 55.657442] ? video_devdata+0xa0/0xa0 [ 55.661325] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.666848] ? do_vfs_ioctl+0x201/0x1790 [ 55.670893] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 55.676415] ? ioctl_preallocate+0x300/0x300 [ 55.680810] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.686330] ? __fget_light+0x2e9/0x430 [ 55.690288] ? fget_raw+0x20/0x20 [ 55.693762] ? rcu_read_lock_sched_held+0x14f/0x180 [ 55.698771] ? kmem_cache_free+0x24f/0x290 [ 55.702991] ? putname+0xf7/0x130 [ 55.706435] do_group_exit+0x177/0x440 [ 55.710314] ? trace_hardirqs_on+0xbd/0x310 [ 55.714620] ? __ia32_sys_exit+0x50/0x50 [ 55.718667] ? trace_hardirqs_off_caller+0x310/0x310 [ 55.723757] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.729283] ? ksys_ioctl+0x81/0xd0 [ 55.732899] __x64_sys_exit_group+0x3e/0x50 [ 55.737210] do_syscall_64+0x1b9/0x820 [ 55.741081] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 55.746433] ? syscall_return_slowpath+0x5e0/0x5e0 [ 55.751357] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 55.756184] ? trace_hardirqs_on_caller+0x310/0x310 [ 55.761187] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 55.766192] ? prepare_exit_to_usermode+0x291/0x3b0 [ 55.771192] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 55.776020] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 55.781193] RIP: 0033:0x442da8 [ 55.784378] Code: Bad RIP value. [ 55.787727] RSP: 002b:00007ffe151d0de8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 55.795414] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442da8 [ 55.802669] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 55.809935] RBP: 00000000004c2968 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 55.817225] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 55.824483] R13: 00000000006d4180 R14: 0000000000000000 R15: 0000000000000000 [ 55.831738] Modules linked in: [ 55.835837] ---[ end trace 235f0a6c63eed4a8 ]--- [ 55.840633] RIP: 0010:vb2_vmalloc_put_userptr+0x73/0x250 [ 55.846113] 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 [ 55.865048] RSP: 0018:ffff8801ba6af3a0 EFLAGS: 00010202 [ 55.870436] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffffffff113e4b8 [ 55.877737] RDX: 0000000000000001 RSI: ffffffff854de1a9 RDI: 0000000000000009 [ 55.885037] RBP: ffff8801ba6af3d0 R08: ffff8801b6840340 R09: ffffed0039758cba [ 55.892338] R10: ffff8801ba6af4c8 R11: ffff8801cbac65d7 R12: ffffc90002551000 [ 55.899635] R13: 0000000000000000 R14: ffff8801d7e3b180 R15: ffff8801d7e3b180 [ 55.906931] FS: 0000000001460880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 55.915155] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 55.921078] CR2: 0000000000442d7e CR3: 000000000946a000 CR4: 00000000001406f0 [ 55.928421] Kernel panic - not syncing: Fatal exception [ 55.934721] Kernel Offset: disabled [ 55.938342] Rebooting in 86400 seconds..