[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.185' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 39.837092] ------------[ cut here ]------------ [ 39.841938] WARNING: CPU: 1 PID: 7965 at drivers/dma-buf/dma-buf.c:1039 dma_buf_vunmap+0x181/0x1f0 [ 39.851010] Kernel panic - not syncing: panic_on_warn set ... [ 39.851010] [ 39.858366] CPU: 1 PID: 7965 Comm: syz-executor799 Not tainted 4.14.292-syzkaller #0 [ 39.866233] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 [ 39.875559] Call Trace: [ 39.878125] dump_stack+0x1b2/0x281 [ 39.881730] panic+0x1f9/0x42d [ 39.884899] ? add_taint.cold+0x16/0x16 [ 39.888854] ? dma_buf_vunmap+0x181/0x1f0 [ 39.892979] ? dma_buf_vunmap+0x181/0x1f0 [ 39.897101] __warn.cold+0x20/0x44 [ 39.900638] ? ist_end_non_atomic+0x10/0x10 [ 39.904950] ? dma_buf_vunmap+0x181/0x1f0 [ 39.909084] report_bug+0x208/0x250 [ 39.912689] do_error_trap+0x195/0x2d0 [ 39.916552] ? math_error+0x2d0/0x2d0 [ 39.920329] ? trace_hardirqs_on+0x10/0x10 [ 39.924553] ? lock_acquire+0x170/0x3f0 [ 39.928502] ? lock_downgrade+0x740/0x740 [ 39.932630] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.937450] invalid_op+0x1b/0x40 [ 39.940884] RIP: 0010:dma_buf_vunmap+0x181/0x1f0 [ 39.945613] RSP: 0018:ffff8880918e7b20 EFLAGS: 00010297 [ 39.950954] RAX: ffff8880a5fe4240 RBX: 0000000000000000 RCX: 0000000000000000 [ 39.958200] RDX: 0000000000000000 RSI: ffffc90005c26000 RDI: 0000000000000000 [ 39.965444] RBP: ffffc90005c26000 R08: 0000000000000000 R09: 000000000004054a [ 39.972688] R10: ffff8880a5fe4af0 R11: ffff8880a5fe4240 R12: ffffc90005c26000 [ 39.979932] R13: ffff8880ab2e15a8 R14: ffff8880b364db80 R15: 0000000000000000 [ 39.987205] vb2_vmalloc_detach_dmabuf+0x57/0x80 [ 39.991937] ? vb2_vmalloc_map_dmabuf+0x90/0x90 [ 39.996592] __vb2_plane_dmabuf_put+0x10b/0x2e0 [ 40.001237] __vb2_queue_free+0x5e4/0x7a0 [ 40.005362] vb2_core_queue_release+0x5b/0x70 [ 40.009835] _vb2_fop_release+0x1c1/0x280 [ 40.013960] vivid_fop_release+0x17d/0x6c0 [ 40.018171] ? fcntl_setlk+0xdb0/0xdb0 [ 40.022033] ? vivid_probe+0x390/0x390 [ 40.025911] ? dev_debug_store+0xe0/0xe0 [ 40.029947] v4l2_release+0xf4/0x190 [ 40.033638] __fput+0x25f/0x7a0 [ 40.036899] task_work_run+0x11f/0x190 [ 40.040764] do_exit+0xa44/0x2850 [ 40.044196] ? __do_page_fault+0x571/0xad0 [ 40.048410] ? mm_update_next_owner+0x5b0/0x5b0 [ 40.053056] ? lock_downgrade+0x740/0x740 [ 40.057200] do_group_exit+0x100/0x2e0 [ 40.061074] SyS_exit_group+0x19/0x20 [ 40.064851] ? do_group_exit+0x2e0/0x2e0 [ 40.068888] do_syscall_64+0x1d5/0x640 [ 40.072754] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 40.077920] RIP: 0033:0x7fd3b2ab8409 [ 40.081607] RSP: 002b:00007fff8765bc58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 40.089295] RAX: ffffffffffffffda RBX: 00007fd3b2b2c270 RCX: 00007fd3b2ab8409 [ 40.096554] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 40.103805] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000000 [ 40.111049] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd3b2b2c270 [ 40.118295] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 40.125964] Kernel Offset: disabled [ 40.129620] Rebooting in 86400 seconds..