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-5,10.128.0.8' (ECDSA) to the list of known hosts. 2017/08/16 11:47:30 parsed 1 programs 2017/08/16 11:47:30 executed programs: 0 syzkaller login: [ 37.574191] kasan: CONFIG_KASAN_INLINE enabled [ 37.575029] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 37.577374] general protection fault: 0000 [#1] SMP KASAN [ 37.578119] Dumping ftrace buffer: [ 37.578609] (ftrace buffer empty) [ 37.579104] Modules linked in: [ 37.579538] CPU: 0 PID: 3363 Comm: syz-executor1 Not tainted 4.13.0-rc5-next-20170816+ #4 [ 37.580655] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.581877] task: ffff8801c7b4e380 task.stack: ffff8801c8238000 [ 37.582707] RIP: 0010:skb_release_data+0x26c/0x790 [ 37.583360] RSP: 0018:ffff8801c823eda8 EFLAGS: 00010202 [ 37.584069] RAX: 0000000000000004 RBX: dffffc0000000000 RCX: 0000000000000000 [ 37.585035] RDX: 0000000000000000 RSI: ffffffff85b34bc0 RDI: 0000000000000020 [ 37.585997] RBP: ffff8801c823eec8 R08: ffff8801cdf26ec8 R09: 000060fe24a0d670 [ 37.586948] R10: ffff8801c823f6b0 R11: 0000000000000007 R12: ffff8801ce6481b0 [ 37.587922] R13: ffffed0039047dcc R14: 1ffff10039047dc4 R15: 0000000000000000 [ 37.588890] FS: 00007f6ddd2e6700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 37.589962] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.590750] CR2: 0000000020004000 CR3: 00000001c7439000 CR4: 00000000001406f0 [ 37.591704] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.592667] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.593918] Call Trace: [ 37.594301] ? print_usage_bug+0x480/0x480 [ 37.598226] ? skb_tx_error+0x2c0/0x2c0 [ 37.602167] ? __lock_is_held+0xb6/0x140 [ 37.606198] skb_release_all+0x4a/0x60 [ 37.610050] kfree_skb+0x15d/0x4c0 [ 37.613559] ? ip_rcv+0x40a/0x17d0 [ 37.617063] ? __kfree_skb+0x20/0x20 [ 37.620745] ? __is_insn_slot_addr+0x1fc/0x330 [ 37.625295] ? __lock_acquire+0x6aa/0x3bc0 [ 37.629496] ip_rcv+0x40a/0x17d0 [ 37.632828] ? ip_local_deliver+0x6d0/0x6d0 [ 37.637111] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 37.642271] ? __lock_acquire+0x6aa/0x3bc0 [ 37.646469] ? __free_insn_slot+0x5c0/0x5c0 [ 37.650754] ? __lock_is_held+0xb6/0x140 [ 37.654783] ? ip_local_deliver+0x6d0/0x6d0 [ 37.659071] __netif_receive_skb_core+0x19af/0x33d0 [ 37.664059] ? unwind_get_return_address+0x61/0xa0 [ 37.668963] ? nf_ingress+0x9f0/0x9f0 [ 37.672728] ? skb_copy_bits+0x4a5/0x6c0 [ 37.676755] ? save_stack+0xa3/0xd0 [ 37.680346] ? save_stack_trace+0x16/0x20 [ 37.684459] ? save_stack+0x43/0xd0 [ 37.688051] ? kasan_slab_alloc+0x12/0x20 [ 37.692165] ? __skb_flow_get_ports+0x151/0x400 [ 37.696804] ? flow_get_u32_dst+0x130/0x130 [ 37.701091] ? __skb_flow_get_ports+0x151/0x400 [ 37.705725] ? check_noncircular+0x20/0x20 [ 37.709933] ? __skb_flow_dissect+0xfa6/0x3ad0 [ 37.714480] ? __sched_text_start+0x8/0x8 [ 37.718597] ? __skb_flow_get_ports+0x400/0x400 [ 37.723233] ? find_held_lock+0x35/0x1d0 [ 37.727270] ? netif_receive_skb_internal+0x1d7/0x5e0 [ 37.732424] ? lock_downgrade+0x990/0x990 [ 37.736543] ? pvclock_read_flags+0x160/0x160 [ 37.741008] ? lock_acquire+0x1d5/0x580 [ 37.744947] ? lock_acquire+0x1d5/0x580 [ 37.748889] ? netif_receive_skb_internal+0x93/0x5e0 [ 37.754077] ? ktime_get_with_offset+0x2c1/0x420 [ 37.758803] ? lock_release+0xa40/0xa40 [ 37.762747] ? do_gettimeofday+0x190/0x190 [ 37.766958] __netif_receive_skb+0x2c/0x1b0 [ 37.771246] ? __netif_receive_skb+0x2c/0x1b0 [ 37.775705] netif_receive_skb_internal+0x10b/0x5e0 [ 37.780684] ? dev_cpu_dead+0xb00/0xb00 [ 37.784626] ? tun_device_event+0xca0/0xca0 [ 37.788915] ? rcu_pm_notify+0xc0/0xc0 [ 37.792771] netif_receive_skb+0xae/0x390 [ 37.796891] ? netif_receive_skb_internal+0x5e0/0x5e0 [ 37.802047] ? futex_wait_setup+0x3d0/0x3d0 [ 37.806335] ? tun_rx_batched.isra.43+0x5bd/0x860 [ 37.811150] tun_rx_batched.isra.43+0x5e7/0x860 [ 37.815789] ? skb_get_hash_perturb+0x9d0/0x9d0 [ 37.820429] ? tun_sock_write_space+0x370/0x370 [ 37.825061] ? tun_free_netdev+0x1b0/0x1b0 [ 37.829263] ? check_noncircular+0x20/0x20 [ 37.833464] tun_get_user+0x11dd/0x2150 [ 37.837408] ? tun_flow_update+0xf70/0xf70 [ 37.841703] ? __tun_get+0x1ab/0x2e0 [ 37.845381] ? lock_downgrade+0x990/0x990 [ 37.849492] ? lock_release+0xa40/0xa40 [ 37.853430] ? __lock_is_held+0xb6/0x140 [ 37.857468] ? __tun_get+0x1d4/0x2e0 [ 37.861146] ? tun_chr_close+0x60/0x60 [ 37.865000] tun_chr_write_iter+0xd8/0x190 [ 37.869201] __vfs_write+0x684/0x970 [ 37.872885] ? default_llseek+0x290/0x290 [ 37.877000] ? _cond_resched+0x14/0x30 [ 37.880852] ? avc_policy_seqno+0x9/0x20 [ 37.884881] ? selinux_file_permission+0x82/0x460 [ 37.889694] ? rw_verify_area+0xe5/0x2b0 [ 37.893718] ? __fdget_raw+0x20/0x20 [ 37.897396] vfs_write+0x189/0x510 [ 37.900911] SyS_write+0xef/0x220 [ 37.904349] ? SyS_read+0x220/0x220 [ 37.907939] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 37.912921] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 37.917643] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 37.922368] RIP: 0033:0x40b751 [ 37.925520] RSP: 002b:00007f6ddd2e5c10 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 [ 37.933195] RAX: ffffffffffffffda RBX: 0000000000718000 RCX: 000000000040b751 [ 37.940429] RDX: 0000000000000036 RSI: 0000000020002000 RDI: 0000000000000003 [ 37.947663] RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000 [ 37.954903] R10: 00000000000f4246 R11: 0000000000000293 R12: 00000000004bab41 [ 37.962143] R13: 00000000ffffffff R14: 0000000020011000 R15: 0000000000000001 [ 37.969384] Code: c6 e8 c9 68 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 [ 37.988448] RIP: skb_release_data+0x26c/0x790 RSP: ffff8801c823eda8 [ 37.994864] ---[ end trace 26d5960c590f2106 ]--- [ 37.999601] Kernel panic - not syncing: Fatal exception in interrupt [ 38.006442] Dumping ftrace buffer: [ 38.009947] (ftrace buffer empty) [ 38.013624] Kernel Offset: disabled [ 38.017217] Rebooting in 86400 seconds..