[ OK ] Started Daily apt upgrade and clean activities. [ OK ] Started Regular background program processing daemon. Starting OpenBSD Secure Shell server... Starting getty on tty2-tty6 if dbus and logind are not available... [ OK ] Started Daily Cleanup of Temporary Directories. [ OK ] Reached target Timers. [ OK ] Started System Logging Service. [ OK ] Started Permit User Sessions. [ 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 '10.128.0.40' (ECDSA) to the list of known hosts. syzkaller login: [ 72.196358][ T29] audit: type=1400 audit(1596402053.020:8): avc: denied { execmem } for pid=6848 comm="syz-executor980" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 72.212914][ T6849] IPVS: ftp: loaded support on port[0] = 21 executing program [ 73.333546][ T6874] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [ 73.345415][ T6874] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 73.353843][ T6874] CPU: 1 PID: 6874 Comm: kworker/u5:2 Not tainted 5.8.0-rc7-syzkaller #0 [ 73.362347][ T6874] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.372419][ T6874] Workqueue: hci0 hci_rx_work [ 73.377122][ T6874] RIP: 0010:hci_phy_link_complete_evt.isra.0+0x23e/0x790 [ 73.384170][ T6874] 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 [ 73.403855][ T6874] RSP: 0018:ffffc900048d7a38 EFLAGS: 00010202 [ 73.409946][ T6874] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff871af0e3 [ 73.417926][ T6874] RDX: 0000000000000002 RSI: ffffffff871af0f0 RDI: 0000000000000010 [ 73.425906][ T6874] RBP: ffff8880a13f0000 R08: 0000000000000001 R09: ffff888086ad6988 [ 73.433885][ T6874] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 73.441885][ T6874] R13: ffff88808eee1110 R14: ffff88809ef4d80b R15: 00000000000000c8 [ 73.449957][ T6874] FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 73.458905][ T6874] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 73.465496][ T6874] CR2: 000055dd071006f0 CR3: 000000009408f000 CR4: 00000000001406e0 [ 73.473492][ T6874] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 73.481466][ T6874] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 73.489452][ T6874] Call Trace: [ 73.492780][ T6874] hci_event_packet+0x481a/0x86f5 [ 73.498016][ T6874] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 73.504021][ T6874] ? __lock_acquire+0x16e3/0x56e0 [ 73.509148][ T6874] ? hci_cmd_complete_evt+0xc6e0/0xc6e0 [ 73.514705][ T6874] ? lock_acquire+0x1f1/0xad0 [ 73.519392][ T6874] ? skb_dequeue+0x1c/0x180 [ 73.523910][ T6874] ? find_held_lock+0x2d/0x110 [ 73.528691][ T6874] ? mark_lock+0xbc/0x1710 [ 73.533162][ T6874] ? mark_held_locks+0x9f/0xe0 [ 73.537967][ T6874] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 73.543790][ T6874] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 73.549827][ T6874] ? trace_hardirqs_on+0x5f/0x220 [ 73.554874][ T6874] ? lockdep_hardirqs_on+0x6a/0xe0 [ 73.560003][ T6874] hci_rx_work+0x22e/0xb10 [ 73.564441][ T6874] process_one_work+0x94c/0x1670 [ 73.569417][ T6874] ? lock_release+0x8d0/0x8d0 [ 73.574372][ T6874] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 73.579763][ T6874] ? rwlock_bug.part.0+0x90/0x90 [ 73.584721][ T6874] ? lockdep_hardirqs_off+0x66/0xa0 [ 73.589968][ T6874] worker_thread+0x64c/0x1120 [ 73.594690][ T6874] ? __kthread_parkme+0x13f/0x1e0 [ 73.599736][ T6874] ? process_one_work+0x1670/0x1670 [ 73.604982][ T6874] kthread+0x3b5/0x4a0 [ 73.609102][ T6874] ? __kthread_bind_mask+0xc0/0xc0 [ 73.614241][ T6874] ? __kthread_bind_mask+0xc0/0xc0 [ 73.619364][ T6874] ret_from_fork+0x1f/0x30 [ 73.623810][ T6874] Modules linked in: [ 73.628995][ T6874] ---[ end trace c45d75837de89c50 ]--- [ 73.634526][ T6874] RIP: 0010:hci_phy_link_complete_evt.isra.0+0x23e/0x790 [ 73.641584][ T6874] 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 [ 73.661456][ T6874] RSP: 0018:ffffc900048d7a38 EFLAGS: 00010202 [ 73.667668][ T6874] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff871af0e3 [ 73.676011][ T6874] RDX: 0000000000000002 RSI: ffffffff871af0f0 RDI: 0000000000000010 [ 73.684070][ T6874] RBP: ffff8880a13f0000 R08: 0000000000000001 R09: ffff888086ad6988 [ 73.692068][ T6874] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 73.700129][ T6874] R13: ffff88808eee1110 R14: ffff88809ef4d80b R15: 00000000000000c8 [ 73.708248][ T6874] FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 73.717257][ T6874] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 73.723934][ T6874] CR2: 000055dd071006f0 CR3: 00000000a8206000 CR4: 00000000001406e0 [ 73.731919][ T6874] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 73.739967][ T6874] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 73.748048][ T6874] Kernel panic - not syncing: Fatal exception [ 73.755339][ T6874] Kernel Offset: disabled [ 73.759710][ T6874] Rebooting in 86400 seconds..