[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.249' (ECDSA) to the list of known hosts. syzkaller login: [ 39.538426] audit: type=1400 audit(1596435815.657:8): avc: denied { execmem } for pid=6474 comm="syz-executor248" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 39.553652] IPVS: ftp: loaded support on port[0] = 21 executing program [ 40.674072] kasan: CONFIG_KASAN_INLINE enabled [ 40.678766] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 40.686606] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 40.692847] CPU: 0 PID: 6500 Comm: kworker/u5:1 Not tainted 4.19.136-syzkaller #0 [ 40.700462] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.709823] Workqueue: hci0 hci_rx_work [ 40.713812] RIP: 0010:hci_phy_link_complete_evt.isra.0+0x24a/0x7a0 [ 40.720112] Code: 48 c1 ea 03 80 3c 02 00 0f 85 60 05 00 00 48 8b 9d 28 08 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 23 05 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b [ 40.739011] RSP: 0000:ffff8880a8d5fa78 EFLAGS: 00010202 [ 40.744361] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff867c041f [ 40.751621] RDX: 0000000000000002 RSI: ffffffff867c042c RDI: 0000000000000010 [ 40.758872] RBP: ffff8880a4a341c0 R08: 0000000000000000 R09: 0000000000000000 [ 40.766122] R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000 [ 40.773370] R13: ffff8880a53299c0 R14: 00000000000000c8 R15: ffff8880a5328a90 [ 40.780618] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 40.788853] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.794713] CR2: 00007f2adb785000 CR3: 0000000008c6d000 CR4: 00000000001406f0 [ 40.801975] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.809252] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.816510] Call Trace: [ 40.819080] hci_event_packet+0x1973/0x858f [ 40.823380] ? mark_held_locks+0xf0/0xf0 [ 40.827416] ? __lock_acquire+0x6de/0x3ff0 [ 40.831628] ? hci_cmd_complete_evt+0xb5e0/0xb5e0 [ 40.836449] ? __update_load_avg_se+0x5ec/0xa00 [ 40.841112] ? debug_object_deactivate+0x1f9/0x2e0 [ 40.846036] ? mark_held_locks+0xa6/0xf0 [ 40.850075] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 40.855168] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 40.859731] hci_rx_work+0x46b/0xa90 [ 40.863421] process_one_work+0x864/0x1570 [ 40.867648] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 40.872305] worker_thread+0x64c/0x1130 [ 40.876298] ? process_one_work+0x1570/0x1570 [ 40.880778] kthread+0x30b/0x410 [ 40.884120] ? kthread_park+0x180/0x180 [ 40.888083] ret_from_fork+0x24/0x30 [ 40.891788] Modules linked in: [ 40.895536] ---[ end trace 7cd899c851552600 ]--- [ 40.900397] RIP: 0010:hci_phy_link_complete_evt.isra.0+0x24a/0x7a0 [ 40.906723] Code: 48 c1 ea 03 80 3c 02 00 0f 85 60 05 00 00 48 8b 9d 28 08 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 23 05 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b [ 40.925670] RSP: 0000:ffff8880a8d5fa78 EFLAGS: 00010202 [ 40.931102] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff867c041f [ 40.938369] RDX: 0000000000000002 RSI: ffffffff867c042c RDI: 0000000000000010 [ 40.945790] RBP: ffff8880a4a341c0 R08: 0000000000000000 R09: 0000000000000000 [ 40.953112] R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000 [ 40.960443] R13: ffff8880a53299c0 R14: 00000000000000c8 R15: ffff8880a5328a90 [ 40.967710] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 40.975957] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.981897] CR2: 00007f2adb785000 CR3: 0000000008c6d000 CR4: 00000000001406f0 [ 40.989160] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.996466] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.003804] Kernel panic - not syncing: Fatal exception [ 41.010236] Kernel Offset: disabled [ 41.013851] Rebooting in 86400 seconds..