[ 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 '10.128.1.7' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 27.447013] BUG: unable to handle kernel NULL pointer dereference at 0000000000000020 [ 27.455080] IP: vb2_vmalloc_put+0x9/0x60 [ 27.459113] PGD 0 P4D 0 [ 27.461780] Oops: 0002 [#1] PREEMPT SMP KASAN [ 27.466243] Modules linked in: [ 27.469409] CPU: 1 PID: 7990 Comm: syz-executor115 Not tainted 4.14.292-syzkaller #0 [ 27.477261] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 [ 27.486586] task: ffff888097014180 task.stack: ffff8880a2480000 [ 27.492716] RIP: 0010:vb2_vmalloc_put+0x9/0x60 [ 27.497273] RSP: 0018:ffff8880a2487b48 EFLAGS: 00010297 [ 27.502611] RAX: ffff888097014180 RBX: ffff8880a235ca00 RCX: 1ffff11012e0294a [ 27.509853] RDX: 0000000000000000 RSI: ffff888097014a30 RDI: 0000000000000000 [ 27.517094] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 27.524333] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 27.531578] R13: ffff8880a235ca14 R14: 0000000000000000 R15: ffffffff84c20ac0 [ 27.538821] FS: 0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 27.547105] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.552969] CR2: 0000000000000020 CR3: 0000000008e6a000 CR4: 00000000003406e0 [ 27.560217] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.567462] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.574707] Call Trace: [ 27.577273] __vb2_buf_mem_free+0xfa/0x1d0 [ 27.581483] __vb2_queue_free+0x60d/0x7a0 [ 27.585608] vb2_core_queue_release+0x5b/0x70 [ 27.590076] _vb2_fop_release+0x1c1/0x280 [ 27.594197] vivid_fop_release+0x17d/0x6c0 [ 27.598404] ? fcntl_setlk+0xdb0/0xdb0 [ 27.602265] ? vivid_probe+0x390/0x390 [ 27.606142] ? dev_debug_store+0xe0/0xe0 [ 27.610178] v4l2_release+0xf4/0x190 [ 27.613863] __fput+0x25f/0x7a0 [ 27.617117] task_work_run+0x11f/0x190 [ 27.620978] do_exit+0xa44/0x2850 [ 27.624405] ? __do_page_fault+0x571/0xad0 [ 27.628613] ? mm_update_next_owner+0x5b0/0x5b0 [ 27.633272] ? lock_downgrade+0x740/0x740 [ 27.637399] do_group_exit+0x100/0x2e0 [ 27.641264] SyS_exit_group+0x19/0x20 [ 27.645039] ? do_group_exit+0x2e0/0x2e0 [ 27.649075] do_syscall_64+0x1d5/0x640 [ 27.653026] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 27.658200] RIP: 0033:0x7fd48482e469 [ 27.661901] RSP: 002b:00007fff674c2848 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 27.669589] RAX: ffffffffffffffda RBX: 00007fd4848a2270 RCX: 00007fd48482e469 [ 27.676850] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 27.684094] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000000 [ 27.691337] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd4848a2270 [ 27.698577] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 27.705835] Code: e9 ca fc ff ff e8 88 f3 bc fc e9 96 fc ff ff e8 ae f5 bc fc e9 fd fe ff ff 66 0f 1f 84 00 00 00 00 00 55 48 89 fd e8 f7 3c 93 fc ff 4d 20 0f 88 3d c3 5f 02 74 06 5d e9 e5 3c 93 fc e8 e0 3c [ 27.724914] RIP: vb2_vmalloc_put+0x9/0x60 RSP: ffff8880a2487b48 [ 27.730940] CR2: 0000000000000020 [ 27.734375] ---[ end trace 2f97ef3eda1f863d ]--- [ 27.739109] Kernel panic - not syncing: Fatal exception [ 27.744614] Kernel Offset: disabled [ 27.748221] Rebooting in 86400 seconds..