[ OK ] Started Regular background program processing daemon. Starting getty on tty2-tty6 if dbus and logind are not available... [ OK ] Started Daily apt upgrade and clean activities. Starting System Logging Service... [ OK ] Started Daily Cleanup of Temporary Directories. [ OK ] Reached target Timers. [ OK ] Started Permit User Sessions. [ OK ] Started System Logging Service. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ 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 ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ 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 '10.128.0.120' (ECDSA) to the list of known hosts. syzkaller login: [ 69.814832][ T28] audit: type=1400 audit(1598527959.044:8): avc: denied { execmem } for pid=6858 comm="syz-executor858" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 70.884581][ T6859] IPVS: ftp: loaded support on port[0] = 21 executing program [ 70.973611][ T6865] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [ 70.985353][ T6865] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 70.993767][ T6865] CPU: 0 PID: 6865 Comm: kworker/u5:2 Not tainted 5.9.0-rc2-syzkaller #0 [ 71.002156][ T6865] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.012203][ T6865] Workqueue: hci0 hci_rx_work [ 71.016873][ T6865] RIP: 0010:hci_phy_link_complete_evt.isra.0+0x23e/0x790 [ 71.023872][ T6865] 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 [ 71.043503][ T6865] RSP: 0018:ffffc90000f37a38 EFLAGS: 00010202 [ 71.049550][ T6865] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff87246ed3 [ 71.057517][ T6865] RDX: 0000000000000002 RSI: ffffffff87246ee0 RDI: 0000000000000010 [ 71.065556][ T6865] RBP: ffff88809ef3c000 R08: 0000000000000001 R09: ffff88808901caa0 [ 71.073574][ T6865] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 71.081525][ T6865] R13: ffff88808e855138 R14: ffff888097a17c0b R15: 00000000000000c9 [ 71.089566][ T6865] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 71.098470][ T6865] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 71.105049][ T6865] CR2: 00000000200000c0 CR3: 000000009d183000 CR4: 00000000001506f0 [ 71.113436][ T6865] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 71.121646][ T6865] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 71.129606][ T6865] Call Trace: [ 71.132889][ T6865] hci_event_packet+0x4696/0x87a8 [ 71.137897][ T6865] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 71.143855][ T6865] ? __lock_acquire+0x16cb/0x5640 [ 71.148859][ T6865] ? hci_cmd_complete_evt+0xc6d0/0xc6d0 [ 71.154385][ T6865] ? lock_acquire+0x1f1/0xad0 [ 71.159043][ T6865] ? skb_dequeue+0x1c/0x180 [ 71.163525][ T6865] ? find_held_lock+0x2d/0x110 [ 71.168703][ T6865] ? mark_lock+0xbc/0x1710 [ 71.173104][ T6865] ? mark_held_locks+0x9f/0xe0 [ 71.177848][ T6865] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 71.183633][ T6865] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 71.189592][ T6865] ? trace_hardirqs_on+0x5f/0x220 [ 71.194594][ T6865] ? lockdep_hardirqs_on+0x76/0xf0 [ 71.199685][ T6865] hci_rx_work+0x22e/0xb50 [ 71.204088][ T6865] process_one_work+0x94c/0x1670 [ 71.209006][ T6865] ? lock_release+0x8e0/0x8e0 [ 71.213664][ T6865] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 71.219013][ T6865] ? rwlock_bug.part.0+0x90/0x90 [ 71.223931][ T6865] worker_thread+0x64c/0x1120 [ 71.228594][ T6865] ? __kthread_parkme+0x13f/0x1e0 [ 71.233595][ T6865] ? process_one_work+0x1670/0x1670 [ 71.238769][ T6865] kthread+0x3b5/0x4a0 [ 71.242816][ T6865] ? __kthread_bind_mask+0xc0/0xc0 [ 71.247906][ T6865] ? __kthread_bind_mask+0xc0/0xc0 [ 71.252998][ T6865] ret_from_fork+0x1f/0x30 [ 71.257392][ T6865] Modules linked in: [ 71.264540][ T6865] ---[ end trace d3ae26d4047098c9 ]--- [ 71.270393][ T6865] RIP: 0010:hci_phy_link_complete_evt.isra.0+0x23e/0x790 [ 71.277413][ T6865] 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 [ 71.297622][ T6865] RSP: 0018:ffffc90000f37a38 EFLAGS: 00010202 [ 71.303955][ T6865] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff87246ed3 [ 71.312348][ T6865] RDX: 0000000000000002 RSI: ffffffff87246ee0 RDI: 0000000000000010 [ 71.320741][ T6865] RBP: ffff88809ef3c000 R08: 0000000000000001 R09: ffff88808901caa0 [ 71.328727][ T6865] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 71.336843][ T6865] R13: ffff88808e855138 R14: ffff888097a17c0b R15: 00000000000000c9 [ 71.345202][ T6865] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 71.354180][ T6865] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 71.354318][ T130] tipc: TX() has been purged, node left! [ 71.360820][ T6865] CR2: 00007f9ec0041178 CR3: 000000009e24c000 CR4: 00000000001506f0 [ 71.360831][ T6865] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 71.360839][ T6865] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 71.360845][ T6865] Kernel panic - not syncing: Fatal exception [ 71.362443][ T6865] Kernel Offset: disabled [ 71.402280][ T6865] Rebooting in 86400 seconds..