[ 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 tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty2. [ 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 '10.128.0.118' (ECDSA) to the list of known hosts. syzkaller login: [ 69.103710][ T27] audit: type=1400 audit(1596392165.162:8): avc: denied { execmem } for pid=6842 comm="syz-executor231" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 69.118392][ T6843] IPVS: ftp: loaded support on port[0] = 21 executing program [ 70.192407][ T6869] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [ 70.204587][ T6869] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 70.213003][ T6869] CPU: 0 PID: 6869 Comm: kworker/u5:2 Not tainted 5.8.0-rc7-syzkaller #0 [ 70.221409][ T6869] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.231466][ T6869] Workqueue: hci0 hci_rx_work [ 70.236137][ T6869] RIP: 0010:hci_phy_link_complete_evt.isra.0+0x23e/0x790 [ 70.243311][ T6869] 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 [ 70.262895][ T6869] RSP: 0018:ffffc90001677a38 EFLAGS: 00010202 [ 70.268939][ T6869] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff871af0e3 [ 70.276888][ T6869] RDX: 0000000000000002 RSI: ffffffff871af0f0 RDI: 0000000000000010 [ 70.284839][ T6869] RBP: ffff88808ee0e000 R08: 0000000000000001 R09: ffff88808dfac8c8 [ 70.292789][ T6869] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 70.300742][ T6869] R13: ffff888086fb9110 R14: ffff8880a7abf80b R15: 00000000000000c8 [ 70.308867][ T6869] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 70.317786][ T6869] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 70.324352][ T6869] CR2: 0000000020000000 CR3: 000000009e0c6000 CR4: 00000000001406f0 [ 70.332305][ T6869] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 70.340255][ T6869] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 70.348376][ T6869] Call Trace: [ 70.351663][ T6869] hci_event_packet+0x481a/0x86f5 [ 70.356933][ T6869] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 70.362891][ T6869] ? __lock_acquire+0x16e3/0x56e0 [ 70.367905][ T6869] ? hci_cmd_complete_evt+0xc6e0/0xc6e0 [ 70.373431][ T6869] ? lock_acquire+0x1f1/0xad0 [ 70.378086][ T6869] ? skb_dequeue+0x1c/0x180 [ 70.382580][ T6869] ? find_held_lock+0x2d/0x110 [ 70.387323][ T6869] ? mark_lock+0xbc/0x1710 [ 70.391811][ T6869] ? mark_held_locks+0x9f/0xe0 [ 70.396556][ T6869] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 70.402357][ T6869] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 70.408315][ T6869] ? trace_hardirqs_on+0x5f/0x220 [ 70.413668][ T6869] ? lockdep_hardirqs_on+0x6a/0xe0 [ 70.418763][ T6869] hci_rx_work+0x22e/0xb10 [ 70.423163][ T6869] process_one_work+0x94c/0x1670 [ 70.428082][ T6869] ? lock_release+0x8d0/0x8d0 [ 70.432739][ T6869] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 70.438088][ T6869] ? rwlock_bug.part.0+0x90/0x90 [ 70.443006][ T6869] ? lockdep_hardirqs_off+0x66/0xa0 [ 70.448281][ T6869] worker_thread+0x64c/0x1120 [ 70.453288][ T6869] ? __kthread_parkme+0x13f/0x1e0 [ 70.458291][ T6869] ? process_one_work+0x1670/0x1670 [ 70.463471][ T6869] kthread+0x3b5/0x4a0 [ 70.467520][ T6869] ? __kthread_bind_mask+0xc0/0xc0 [ 70.472631][ T6869] ? __kthread_bind_mask+0xc0/0xc0 [ 70.477723][ T6869] ret_from_fork+0x1f/0x30 [ 70.482114][ T6869] Modules linked in: [ 70.490013][ T6869] ---[ end trace f825edc857f93516 ]--- [ 70.495573][ T6869] RIP: 0010:hci_phy_link_complete_evt.isra.0+0x23e/0x790 [ 70.502773][ T6869] 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 [ 70.522990][ T6869] RSP: 0018:ffffc90001677a38 EFLAGS: 00010202 [ 70.529141][ T6869] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff871af0e3 [ 70.537223][ T6869] RDX: 0000000000000002 RSI: ffffffff871af0f0 RDI: 0000000000000010 [ 70.545293][ T6869] RBP: ffff88808ee0e000 R08: 0000000000000001 R09: ffff88808dfac8c8 [ 70.553442][ T6869] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 70.561424][ T6869] R13: ffff888086fb9110 R14: ffff8880a7abf80b R15: 00000000000000c8 [ 70.569922][ T6869] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 70.578953][ T6869] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 70.585598][ T6869] CR2: 00007ffd2b6fbdd7 CR3: 00000000933cc000 CR4: 00000000001406f0 [ 70.593728][ T6869] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 70.601774][ T6869] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 70.609749][ T6869] Kernel panic - not syncing: Fatal exception [ 70.617215][ T6869] Kernel Offset: disabled [ 70.621532][ T6869] Rebooting in 86400 seconds..