[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.101' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 26.417741] get_vaddr_frames() cannot follow VM_IO mapping [ 26.417814] ------------[ cut here ]------------ [ 26.428251] WARNING: CPU: 0 PID: 7965 at mm/frame_vector.c:79 get_vaddr_frames.cold+0x18/0x1f [ 26.436968] Kernel panic - not syncing: panic_on_warn set ... [ 26.436968] [ 26.444308] CPU: 0 PID: 7965 Comm: syz-executor284 Not tainted 4.14.301-syzkaller #0 [ 26.452160] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 26.461485] Call Trace: [ 26.464048] dump_stack+0x1b2/0x281 [ 26.467648] panic+0x1f9/0x42d [ 26.470811] ? add_taint.cold+0x16/0x16 [ 26.474772] ? get_vaddr_frames.cold+0x18/0x1f [ 26.479337] ? get_vaddr_frames.cold+0x18/0x1f [ 26.483895] __warn.cold+0x20/0x44 [ 26.487419] ? ist_end_non_atomic+0x10/0x10 [ 26.491718] ? get_vaddr_frames.cold+0x18/0x1f [ 26.496276] report_bug+0x208/0x250 [ 26.499886] do_error_trap+0x195/0x2d0 [ 26.503844] ? math_error+0x2d0/0x2d0 [ 26.507618] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.512433] invalid_op+0x1b/0x40 [ 26.515857] RIP: 0010:get_vaddr_frames.cold+0x18/0x1f [ 26.521014] RSP: 0018:ffff8880926a7690 EFLAGS: 00010282 [ 26.526349] RAX: 000000000000002e RBX: ffff8880b3a09440 RCX: 0000000000000000 [ 26.533591] RDX: 0000000000000000 RSI: ffff8880ab55ea70 RDI: ffffed10124d4ec8 [ 26.540831] RBP: 0000000000000096 R08: 000000000000002e R09: 0000000000000000 [ 26.548073] R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff110124d4ed5 [ 26.555312] R13: 0000000020000000 R14: 0000000000000000 R15: ffff88809ef51eb0 [ 26.562561] ? page_idle_bitmap_write+0x330/0x330 [ 26.567380] ? kvmalloc_node+0x4e/0xd0 [ 26.571241] vb2_create_framevec+0x70/0xd0 [ 26.575447] vb2_vmalloc_get_userptr+0xcf/0x470 [ 26.580087] ? vb2_vmalloc_put_userptr+0x210/0x210 [ 26.584984] __prepare_userptr+0x304/0x1040 [ 26.589278] ? vb2_queue_error+0x50/0x50 [ 26.593310] ? vb2_core_reqbufs+0x658/0x910 [ 26.597602] ? vb2_core_reqbufs+0x68e/0x910 [ 26.601899] ? lock_downgrade+0x740/0x740 [ 26.606018] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 26.611439] ? __mutex_unlock_slowpath+0x75/0x770 [ 26.616250] ? wait_for_completion_io+0x10/0x10 [ 26.620890] ? __lock_acquire+0x5fc/0x3f20 [ 26.625095] __buf_prepare+0x3f6/0x4f0 [ 26.628963] ? is_bpf_text_address+0x91/0x150 [ 26.633430] vb2_core_qbuf+0x112/0xb60 [ 26.637286] ? lock_downgrade+0x740/0x740 [ 26.641405] ? vb2_queue_or_prepare_buf+0x238/0x340 [ 26.646391] vb2_qbuf+0x95/0xe0 [ 26.649640] v4l2_m2m_qbuf+0x66/0x150 [ 26.653411] v4l_qbuf+0x88/0xb0 [ 26.656664] __video_do_ioctl+0x65b/0x6a0 [ 26.660785] ? video_ioctl2+0x30/0x30 [ 26.664557] ? __might_fault+0x177/0x1b0 [ 26.668588] ? video_ioctl2+0x30/0x30 [ 26.672359] video_usercopy+0xfd/0xe70 [ 26.676218] ? lock_downgrade+0x740/0x740 [ 26.680337] ? v4l_g_ctrl+0x390/0x390 [ 26.684104] ? lock_acquire+0x170/0x3f0 [ 26.688051] ? wait_for_completion_io+0x10/0x10 [ 26.692709] v4l2_ioctl+0x1bb/0x2f0 [ 26.696303] ? v4l2_open+0x2f0/0x2f0 [ 26.699987] do_vfs_ioctl+0x75a/0xff0 [ 26.703759] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 26.709187] ? ioctl_preallocate+0x1a0/0x1a0 [ 26.713564] ? kmem_cache_free+0x23a/0x2b0 [ 26.717768] ? putname+0xcd/0x110 [ 26.721191] ? do_sys_open+0x208/0x410 [ 26.725048] ? filp_open+0x60/0x60 [ 26.728559] ? security_file_ioctl+0x83/0xb0 [ 26.732949] SyS_ioctl+0x7f/0xb0 [ 26.736283] ? do_vfs_ioctl+0xff0/0xff0 [ 26.740229] do_syscall_64+0x1d5/0x640 [ 26.744098] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 26.749258] RIP: 0033:0x7fcc9973c849 [ 26.752940] RSP: 002b:00007ffce89f71d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 26.760617] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcc9973c849 [ 26.767862] RDX: 0000000020000300 RSI: 00000000c058560f RDI: 0000000000000004 [ 26.775102] RBP: 00007fcc996fc3f0 R08: 0000000000000000 R09: 0000000000000000 [ 26.782349] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcc996fc480 [ 26.789590] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 26.797196] Kernel Offset: disabled [ 26.800867] Rebooting in 86400 seconds..