[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.187' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 31.618622] BUG: unable to handle kernel NULL pointer dereference at 0000000000000020 [ 31.626604] IP: vb2_vmalloc_put+0x9/0x60 [ 31.630643] PGD 0 P4D 0 [ 31.633291] Oops: 0002 [#1] PREEMPT SMP KASAN [ 31.637765] Modules linked in: [ 31.640936] CPU: 1 PID: 7970 Comm: syz-executor118 Not tainted 4.14.302-syzkaller #0 [ 31.648786] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 31.658114] task: ffff8880b3a6a300 task.stack: ffff88808d528000 [ 31.664151] RIP: 0010:vb2_vmalloc_put+0x9/0x60 [ 31.668705] RSP: 0018:ffff88808d52fb98 EFLAGS: 00010297 [ 31.674045] RAX: ffff8880b3a6a300 RBX: ffff8880a4b94d40 RCX: 1ffff1101674d57a [ 31.681288] RDX: 0000000000000000 RSI: ffff8880b3a6abb0 RDI: 0000000000000000 [ 31.688622] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 31.695927] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 31.703170] R13: ffff8880a4b94d54 R14: 0000000000000000 R15: ffffffff84c281a0 [ 31.710415] FS: 0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 31.720871] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 31.726728] CR2: 0000000000000020 CR3: 0000000008e6a000 CR4: 00000000003406e0 [ 31.733978] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.741252] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.748498] Call Trace: [ 31.751064] __vb2_buf_mem_free+0xfa/0x1d0 [ 31.755276] __vb2_queue_free+0x60d/0x7a0 [ 31.759401] ? vidioc_querycap+0xd0/0xd0 [ 31.763433] ? dev_debug_store+0xe0/0xe0 [ 31.767467] vb2_core_queue_release+0x5b/0x70 [ 31.771935] v4l2_m2m_ctx_release+0x26/0x30 [ 31.776230] vim2m_release+0xd4/0x120 [ 31.780008] v4l2_release+0xf4/0x190 [ 31.783698] __fput+0x25f/0x7a0 [ 31.786953] task_work_run+0x11f/0x190 [ 31.790818] do_exit+0xa44/0x2850 [ 31.794248] ? __do_page_fault+0x571/0xad0 [ 31.798457] ? mm_update_next_owner+0x5b0/0x5b0 [ 31.803099] ? lock_downgrade+0x740/0x740 [ 31.807222] do_group_exit+0x100/0x2e0 [ 31.811084] SyS_exit_group+0x19/0x20 [ 31.814859] ? do_group_exit+0x2e0/0x2e0 [ 31.818892] do_syscall_64+0x1d5/0x640 [ 31.822756] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 31.827918] RIP: 0033:0x7f8adb043f19 [ 31.831602] RSP: 002b:00007ffd4b3dac68 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 31.839283] RAX: ffffffffffffffda RBX: 00007f8adb0b8270 RCX: 00007f8adb043f19 [ 31.846531] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 31.853777] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000000 [ 31.861021] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8adb0b8270 [ 31.868298] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 31.875564] Code: e9 ca fc ff ff e8 b8 99 bc fc e9 96 fc ff ff e8 de 9b bc fc e9 fd fe ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 fd e8 97 d8 92 fc ff 4d 20 0f 88 f0 d9 5f 02 74 06 5d e9 85 d8 92 fc e8 80 d8 [ 31.894630] RIP: vb2_vmalloc_put+0x9/0x60 RSP: ffff88808d52fb98 [ 31.900658] CR2: 0000000000000020 [ 31.904087] ---[ end trace 8534a613c3f7056b ]--- [ 31.908819] Kernel panic - not syncing: Fatal exception [ 31.914257] Kernel Offset: disabled [ 31.917864] Rebooting in 86400 seconds..