[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.109' (ECDSA) to the list of known hosts. syzkaller login: [ 1291.516901] IPVS: ftp: loaded support on port[0] = 21 [ 1291.596875] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 1291.605552] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 1291.618048] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 1291.625394] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 1291.635386] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready executing program [ 1291.642900] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 1291.650239] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 1291.656919] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready executing program executing program executing program executing program executing program [ 1293.567377] Bluetooth: hci0: command 0x0409 tx timeout executing program executing program executing program executing program executing program executing program executing program [ 1295.636808] Bluetooth: hci0: command 0x041b tx timeout executing program executing program executing program executing program executing program executing program [ 1297.716720] Bluetooth: hci0: command 0x040f tx timeout executing program executing program executing program executing program executing program executing program executing program [ 1299.796566] Bluetooth: hci0: command 0x0419 tx timeout executing program executing program executing program executing program [ 1301.407709] ieee802154 phy0 wpan0: encryption failed: -22 [ 1301.413427] ieee802154 phy1 wpan1: encryption failed: -22 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 1334.674862] kasan: CONFIG_KASAN_INLINE enabled [ 1334.679457] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 1334.686817] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 1334.693063] CPU: 0 PID: 8170 Comm: kworker/0:0 Not tainted 4.19.207-syzkaller #0 [ 1334.700576] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1334.709923] Workqueue: events l2cap_chan_timeout [ 1334.714700] RIP: 0010:__lock_acquire+0x1eb/0x3ff0 [ 1334.719560] Code: 2b 29 00 00 48 81 c4 98 01 00 00 44 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 b3 2a 00 00 49 81 3e 20 f2 66 8c 0f 84 65 ff ff [ 1334.738438] RSP: 0018:ffff8880af37f958 EFLAGS: 00010006 [ 1334.743776] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 1334.751023] RDX: 0000000000000053 RSI: 0000000000000000 RDI: 0000000000000001 [ 1334.758302] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 [ 1334.765562] R10: 0000000000000001 R11: 0000000000074071 R12: 0000000000000000 [ 1334.772814] R13: ffff8880b3b7e080 R14: 0000000000000298 R15: 0000000000000001 [ 1334.780102] FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 1334.788308] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1334.794168] CR2: 00007fc374dbc718 CR3: 00000000928c0000 CR4: 00000000001406f0 [ 1334.801416] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1334.808662] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1334.815908] Call Trace: [ 1334.818482] ? unwind_next_frame+0x1400/0x1400 [ 1334.823046] ? __save_stack_trace+0x9f/0x190 [ 1334.827433] ? ret_from_fork+0x24/0x30 [ 1334.831300] ? mark_held_locks+0xf0/0xf0 [ 1334.835338] ? __save_stack_trace+0x9f/0x190 [ 1334.839722] ? ret_from_fork+0x24/0x30 [ 1334.843586] ? ret_from_fork+0x24/0x30 [ 1334.847459] ? add_lock_to_list.constprop.0+0x17d/0x330 [ 1334.852811] ? save_trace+0xd6/0x290 [ 1334.856504] lock_acquire+0x170/0x3c0 [ 1334.860283] ? l2cap_chan_timeout+0x69/0x2f0 [ 1334.864671] ? l2cap_chan_timeout+0x69/0x2f0 [ 1334.869059] __mutex_lock+0xd7/0x1190 [ 1334.872841] ? l2cap_chan_timeout+0x69/0x2f0 [ 1334.877225] ? mark_held_locks+0xf0/0xf0 [ 1334.881276] ? lock_downgrade+0x720/0x720 [ 1334.885401] ? lock_acquire+0x170/0x3c0 [ 1334.889355] ? l2cap_chan_timeout+0x69/0x2f0 [ 1334.893738] ? mutex_trylock+0x1a0/0x1a0 [ 1334.897779] ? trace_hardirqs_off+0x64/0x200 [ 1334.902171] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 1334.907250] ? process_one_work+0x77b/0x1570 [ 1334.911638] ? check_preemption_disabled+0x41/0x280 [ 1334.916640] l2cap_chan_timeout+0x69/0x2f0 [ 1334.920862] process_one_work+0x864/0x1570 [ 1334.925078] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 1334.929726] worker_thread+0x64c/0x1130 [ 1334.933676] ? __kthread_parkme+0x133/0x1e0 [ 1334.937983] ? process_one_work+0x1570/0x1570 [ 1334.942455] kthread+0x33f/0x460 [ 1334.945803] ? kthread_park+0x180/0x180 [ 1334.949756] ret_from_fork+0x24/0x30 [ 1334.953459] Modules linked in: [ 1334.956636] ---[ end trace 92fca598f788abb7 ]--- [ 1334.961385] RIP: 0010:__lock_acquire+0x1eb/0x3ff0 [ 1334.966206] Code: 2b 29 00 00 48 81 c4 98 01 00 00 44 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 b3 2a 00 00 49 81 3e 20 f2 66 8c 0f 84 65 ff ff [ 1334.985261] RSP: 0018:ffff8880af37f958 EFLAGS: 00010006 [ 1334.990615] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 1334.997864] RDX: 0000000000000053 RSI: 0000000000000000 RDI: 0000000000000001 [ 1335.005112] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 [ 1335.012356] R10: 0000000000000001 R11: 0000000000074071 R12: 0000000000000000 [ 1335.019604] R13: ffff8880b3b7e080 R14: 0000000000000298 R15: 0000000000000001 [ 1335.026853] FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 1335.035053] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1335.040912] CR2: 00007fc374dbc718 CR3: 00000000928c0000 CR4: 00000000001406f0 [ 1335.048171] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1335.055418] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1335.062666] Kernel panic - not syncing: Fatal exception [ 1335.068237] Kernel Offset: disabled [ 1335.071855] Rebooting in 86400 seconds..