[ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ 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... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.23' (ECDSA) to the list of known hosts. syzkaller login: [ 68.095733][ T29] audit: type=1400 audit(1596389748.659:8): avc: denied { execmem } for pid=6819 comm="syz-executor601" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 68.109197][ T6820] IPVS: ftp: loaded support on port[0] = 21 executing program [ 69.185710][ T6846] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [ 69.197447][ T6846] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 69.205852][ T6846] CPU: 0 PID: 6846 Comm: kworker/u5:2 Not tainted 5.8.0-rc7-syzkaller #0 [ 69.214248][ T6846] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.224304][ T6846] Workqueue: hci0 hci_rx_work [ 69.228984][ T6846] RIP: 0010:hci_phy_link_complete_evt.isra.0+0x23e/0x790 [ 69.235989][ T6846] Code: 48 c1 ea 03 80 3c 02 00 0f 85 3e 05 00 00 48 8b 9d 30 09 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 10 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 da 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b [ 69.255568][ T6846] RSP: 0018:ffffc90001637a38 EFLAGS: 00010202 [ 69.261610][ T6846] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff871af0e3 [ 69.269557][ T6846] RDX: 0000000000000002 RSI: ffffffff871af0f0 RDI: 0000000000000010 [ 69.277505][ T6846] RBP: ffff888094e0a000 R08: 0000000000000001 R09: ffff8880a190a9c8 [ 69.285452][ T6846] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 69.293400][ T6846] R13: ffff888094f19110 R14: ffff88809edd880b R15: 00000000000000c8 [ 69.301350][ T6846] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 69.310251][ T6846] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.316808][ T6846] CR2: 0000000020000000 CR3: 00000000a38b4000 CR4: 00000000001406f0 [ 69.324773][ T6846] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.332724][ T6846] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.340671][ T6846] Call Trace: [ 69.343945][ T6846] hci_event_packet+0x481a/0x86f5 [ 69.349054][ T6846] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 69.355008][ T6846] ? __lock_acquire+0x16e3/0x56e0 [ 69.360010][ T6846] ? hci_cmd_complete_evt+0xc6e0/0xc6e0 [ 69.365531][ T6846] ? lock_acquire+0x1f1/0xad0 [ 69.370208][ T6846] ? skb_dequeue+0x1c/0x180 [ 69.374686][ T6846] ? find_held_lock+0x2d/0x110 [ 69.379428][ T6846] ? mark_lock+0xbc/0x1710 [ 69.383822][ T6846] ? mark_held_locks+0x9f/0xe0 [ 69.388562][ T6846] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 69.394343][ T6846] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 69.400296][ T6846] ? trace_hardirqs_on+0x5f/0x220 [ 69.405299][ T6846] ? lockdep_hardirqs_on+0x6a/0xe0 [ 69.410505][ T6846] hci_rx_work+0x22e/0xb10 [ 69.414913][ T6846] process_one_work+0x94c/0x1670 [ 69.419835][ T6846] ? lock_release+0x8d0/0x8d0 [ 69.424494][ T6846] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 69.429857][ T6846] ? rwlock_bug.part.0+0x90/0x90 [ 69.434782][ T6846] ? lockdep_hardirqs_off+0x66/0xa0 [ 69.439964][ T6846] worker_thread+0x64c/0x1120 [ 69.444627][ T6846] ? __kthread_parkme+0x13f/0x1e0 [ 69.449640][ T6846] ? process_one_work+0x1670/0x1670 [ 69.454814][ T6846] kthread+0x3b5/0x4a0 [ 69.458873][ T6846] ? __kthread_bind_mask+0xc0/0xc0 [ 69.463959][ T6846] ? __kthread_bind_mask+0xc0/0xc0 [ 69.469049][ T6846] ret_from_fork+0x1f/0x30 [ 69.473439][ T6846] Modules linked in: [ 69.485703][ T6846] ---[ end trace 7acedfcf0ae64cf4 ]--- [ 69.491179][ T6846] RIP: 0010:hci_phy_link_complete_evt.isra.0+0x23e/0x790 [ 69.498889][ T6846] Code: 48 c1 ea 03 80 3c 02 00 0f 85 3e 05 00 00 48 8b 9d 30 09 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 10 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 da 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b [ 69.518819][ T6846] RSP: 0018:ffffc90001637a38 EFLAGS: 00010202 [ 69.524905][ T6846] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff871af0e3 [ 69.532918][ T6846] RDX: 0000000000000002 RSI: ffffffff871af0f0 RDI: 0000000000000010 [ 69.540925][ T6846] RBP: ffff888094e0a000 R08: 0000000000000001 R09: ffff8880a190a9c8 [ 69.548915][ T6846] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 69.556945][ T6846] R13: ffff888094f19110 R14: ffff88809edd880b R15: 00000000000000c8 [ 69.564903][ T6846] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 69.573842][ T6846] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.580469][ T6846] CR2: 00007f17886f4020 CR3: 000000008fb2a000 CR4: 00000000001406f0 [ 69.588468][ T6846] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.596471][ T6846] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.604573][ T6846] Kernel panic - not syncing: Fatal exception [ 69.611759][ T6846] Kernel Offset: disabled [ 69.616073][ T6846] Rebooting in 86400 seconds..