[ 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 '10.128.1.45' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 28.958337] BUG: unable to handle kernel NULL pointer dereference at 0000000000000020 [ 28.966329] IP: vb2_vmalloc_put+0x9/0x60 [ 28.970362] PGD 0 P4D 0 [ 28.973010] Oops: 0002 [#1] PREEMPT SMP KASAN [ 28.977473] Modules linked in: [ 28.980646] CPU: 0 PID: 7954 Comm: syz-executor245 Not tainted 4.14.302-syzkaller #0 [ 28.988495] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 28.997820] task: ffff8880b34ca000 task.stack: ffff8880b3a18000 [ 29.003852] RIP: 0010:vb2_vmalloc_put+0x9/0x60 [ 29.008404] RSP: 0018:ffff8880b3a1fb98 EFLAGS: 00010297 [ 29.013779] RAX: ffff8880b34ca000 RBX: ffff8880981a3080 RCX: 1ffff1101669951a [ 29.021022] RDX: 0000000000000000 RSI: ffff8880b34ca8b0 RDI: 0000000000000000 [ 29.028266] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 29.035508] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 29.042748] R13: ffff8880981a3094 R14: 0000000000000000 R15: ffffffff84c281a0 [ 29.049991] FS: 0000555555a87300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 29.058189] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.064043] CR2: 0000000000000020 CR3: 0000000008e6a000 CR4: 00000000003406f0 [ 29.071285] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.078528] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.085768] Call Trace: [ 29.088333] __vb2_buf_mem_free+0xfa/0x1d0 [ 29.092543] __vb2_queue_free+0x60d/0x7a0 [ 29.096668] ? vidioc_querycap+0xd0/0xd0 [ 29.100701] ? dev_debug_store+0xe0/0xe0 [ 29.104732] vb2_core_queue_release+0x5b/0x70 [ 29.109201] v4l2_m2m_ctx_release+0x26/0x30 [ 29.113496] vim2m_release+0xd4/0x120 [ 29.117268] v4l2_release+0xf4/0x190 [ 29.120955] __fput+0x25f/0x7a0 [ 29.124208] task_work_run+0x11f/0x190 [ 29.128066] do_exit+0xa44/0x2850 [ 29.131493] ? __do_page_fault+0x571/0xad0 [ 29.135698] ? mm_update_next_owner+0x5b0/0x5b0 [ 29.140339] ? lock_downgrade+0x740/0x740 [ 29.144460] do_group_exit+0x100/0x2e0 [ 29.148325] SyS_exit_group+0x19/0x20 [ 29.152097] ? do_group_exit+0x2e0/0x2e0 [ 29.156128] do_syscall_64+0x1d5/0x640 [ 29.159991] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 29.165152] RIP: 0033:0x7f6d897f4f19 [ 29.168842] RSP: 002b:00007fff57ab1328 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 29.176528] RAX: ffffffffffffffda RBX: 00007f6d89869270 RCX: 00007f6d897f4f19 [ 29.183779] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 29.191020] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000000 [ 29.198262] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6d89869270 [ 29.205506] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 29.212752] 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 [ 29.231812] RIP: vb2_vmalloc_put+0x9/0x60 RSP: ffff8880b3a1fb98 [ 29.237839] CR2: 0000000000000020 [ 29.241268] ---[ end trace 899a3b6de3ea3550 ]--- [ 29.245993] Kernel panic - not syncing: Fatal exception [ 29.251505] Kernel Offset: disabled [ 29.255109] Rebooting in 86400 seconds..