INIT: Entering runlevel: 2

[info] Using makefile-style concurrent boot in runlevel 2.
[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added 'ci-upstream-next-kasan-gce-0,10.128.0.29' (ECDSA) to the list of known hosts.
2017/08/15 09:20:11 parsed 1 programs
2017/08/15 09:20:11 executed programs: 0
syzkaller login: [   52.874681] kasan: CONFIG_KASAN_INLINE enabled
[   52.879369] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   52.886917] general protection fault: 0000 [#1] SMP KASAN
[   52.892430] Dumping ftrace buffer:
[   52.895934]    (ftrace buffer empty)
[   52.899642] Modules linked in:
[   52.902814] CPU: 1 PID: 3730 Comm: syz-executor6 Not tainted 4.13.0-rc5-next-20170815+ #3
[   52.911120] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   52.920458] task: ffff8801c81bc6c0 task.stack: ffff8801c77b0000
[   52.926484] RIP: 0010:skb_release_data+0x26c/0x790
[   52.931376] RSP: 0018:ffff8801c77b6da8 EFLAGS: 00010202
[   52.936702] RAX: 0000000000004064 RBX: dffffc0000000000 RCX: 0000000000000000
[   52.943946] RDX: 0000000000000000 RSI: ffffffff85b34bc0 RDI: 0000000000020321
[   52.951187] RBP: ffff8801c77b6ec8 R08: ffff8801c7b2cb88 R09: 0000000000000000
[   52.958429] R10: ffff8801c77b76b0 R11: 0000000000000007 R12: ffff8801c82401b0
[   52.965669] R13: ffffed0038ef6dcc R14: 1ffff10038ef6dc4 R15: 0000000000020301
[   52.972917] FS:  00007f9919300700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
[   52.981141] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   52.986996] CR2: 0000000000461ec0 CR3: 00000001cb880000 CR4: 00000000001406e0
[   52.994240] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   53.001472] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   53.008709] Call Trace:
[   53.011261]  ? print_usage_bug+0x480/0x480
[   53.015473]  ? skb_tx_error+0x2c0/0x2c0
[   53.019415]  ? __lock_is_held+0xb6/0x140
[   53.023445]  skb_release_all+0x4a/0x60
[   53.027296]  kfree_skb+0x15d/0x4c0
[   53.030800]  ? ip_rcv+0x40a/0x17d0
[   53.034329]  ? __kfree_skb+0x20/0x20
[   53.038016]  ? __is_insn_slot_addr+0x1fc/0x330
[   53.042568]  ? __lock_acquire+0x6aa/0x3bc0
[   53.046771]  ip_rcv+0x40a/0x17d0
[   53.050104]  ? ip_local_deliver+0x6d0/0x6d0
[   53.054391]  ? debug_check_no_locks_freed+0x3c0/0x3c0
[   53.059547]  ? __lock_acquire+0x6aa/0x3bc0
[   53.063745]  ? __free_insn_slot+0x5c0/0x5c0
[   53.068034]  ? __lock_is_held+0xb6/0x140
[   53.072083]  ? ip_local_deliver+0x6d0/0x6d0
[   53.076392]  __netif_receive_skb_core+0x19af/0x33d0
[   53.081374]  ? unwind_get_return_address+0x61/0xa0
[   53.086272]  ? nf_ingress+0x9f0/0x9f0
[   53.090039]  ? save_stack+0xa3/0xd0
[   53.093644]  ? save_stack_trace+0x16/0x20
[   53.097770]  ? save_stack+0x43/0xd0
[   53.101358]  ? kasan_kmalloc+0xad/0xe0
[   53.105207]  ? kasan_slab_alloc+0x12/0x20
[   53.109319]  ? kmem_cache_alloc+0x12e/0x760
[   53.113609]  ? __build_skb+0x9d/0x450
[   53.117409]  ? build_skb+0x6f/0x260
[   53.121002]  ? tun_get_user+0x1db7/0x2150
[   53.125126]  ? tun_chr_write_iter+0xd8/0x190
[   53.129501]  ? __vfs_write+0x684/0x970
[   53.133353]  ? vfs_write+0x189/0x510
[   53.137033]  ? __skb_flow_get_ports+0x151/0x400
[   53.141681]  ? flow_get_u32_dst+0x130/0x130
[   53.145970]  ? __skb_flow_get_ports+0x151/0x400
[   53.150606]  ? check_noncircular+0x20/0x20
[   53.154813]  ? __skb_flow_dissect+0xfa1/0x3ae0
[   53.159366]  ? __sched_text_start+0x8/0x8
[   53.163484]  ? __skb_flow_get_ports+0x400/0x400
[   53.168136]  ? find_held_lock+0x35/0x1d0
[   53.172170]  ? netif_receive_skb_internal+0x1d7/0x5e0
[   53.177327]  ? lock_downgrade+0x990/0x990
[   53.181443]  ? pvclock_read_flags+0x160/0x160
[   53.185907]  ? lock_acquire+0x1d5/0x580
[   53.189844]  ? lock_acquire+0x1d5/0x580
[   53.193784]  ? netif_receive_skb_internal+0x93/0x5e0
[   53.198854]  ? ktime_get_with_offset+0x2c1/0x420
[   53.203590]  ? lock_release+0xa40/0xa40
[   53.207532]  ? do_gettimeofday+0x190/0x190
[   53.211740]  __netif_receive_skb+0x2c/0x1b0
[   53.216035]  ? __netif_receive_skb+0x2c/0x1b0
[   53.220496]  netif_receive_skb_internal+0x10b/0x5e0
[   53.225476]  ? dev_cpu_dead+0xb00/0xb00
[   53.229415]  ? tun_device_event+0xca0/0xca0
[   53.233743]  ? rcu_pm_notify+0xc0/0xc0
[   53.237599]  netif_receive_skb+0xae/0x390
[   53.241714]  ? netif_receive_skb_internal+0x5e0/0x5e0
[   53.246883]  ? futex_wait_setup+0x3d0/0x3d0
[   53.251192]  ? tun_rx_batched.isra.43+0x5bd/0x860
[   53.256004]  tun_rx_batched.isra.43+0x5e7/0x860
[   53.260652]  ? skb_get_hash_perturb+0x9d0/0x9d0
[   53.265302]  ? tun_sock_write_space+0x370/0x370
[   53.269938]  ? tun_free_netdev+0x1b0/0x1b0
[   53.274142]  ? check_noncircular+0x20/0x20
[   53.278347]  tun_get_user+0x11dd/0x2150
[   53.282311]  ? tun_flow_update+0xf70/0xf70
[   53.286516]  ? __tun_get+0x1ab/0x2e0
[   53.290196]  ? lock_downgrade+0x990/0x990
[   53.294613]  ? lock_release+0xa40/0xa40
[   53.298552]  ? __lock_is_held+0xb6/0x140
[   53.302643]  ? __tun_get+0x1d4/0x2e0
[   53.306320]  ? tun_chr_close+0x60/0x60
[   53.310177]  tun_chr_write_iter+0xd8/0x190
[   53.314380]  __vfs_write+0x684/0x970
[   53.318062]  ? default_llseek+0x290/0x290
[   53.322182]  ? _cond_resched+0x14/0x30
[   53.326040]  ? avc_policy_seqno+0x9/0x20
[   53.330073]  ? selinux_file_permission+0x82/0x460
[   53.334885]  ? rw_verify_area+0xe5/0x2b0
[   53.338915]  ? __fdget_raw+0x20/0x20
[   53.342597]  vfs_write+0x189/0x510
[   53.346107]  SyS_write+0xef/0x220
[   53.349588]  ? SyS_read+0x220/0x220
[   53.353196]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   53.358273]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   53.362999]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   53.367721] RIP: 0033:0x40b751
[   53.370882] RSP: 002b:00007f99192ffc10 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
[   53.378566] RAX: ffffffffffffffda RBX: 00000000007180a8 RCX: 000000000040b751
[   53.385819] RDX: 0000000000000036 RSI: 0000000020004000 RDI: 0000000000000003
[   53.393074] RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000
[   53.400311] R10: 00000000000f4246 R11: 0000000000000293 R12: 00000000004bab2d
[   53.407545] R13: 00000000ffffffff R14: 0000000020013ff8 R15: 0000000000000000
[   53.414806] Code: c6 e8 c9 78 8d fd 4c 89 e0 48 c1 e8 03 80 3c 18 00 0f 85 93 04 00 00 4d 8b 3c 24 41 c6 45 00 00 49 8d 7f 20 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 6b 04 00 00 41 80 7d 00 00 49 8b 47 20 0f 85 
[   53.433903] RIP: skb_release_data+0x26c/0x790 RSP: ffff8801c77b6da8
[   53.440324] ---[ end trace b73250298c6ead0a ]---
[   53.445070] Kernel panic - not syncing: Fatal exception in interrupt
[   53.451573] Dumping ftrace buffer:
[   53.455092]    (ftrace buffer empty)
[   53.458768] Kernel Offset: disabled
[   53.462370] Rebooting in 86400 seconds..