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-kasan-gce-8,10.128.15.192' (ECDSA) to the list of known hosts.
2017/09/10 03:18:42 parsed 1 programs
2017/09/10 03:18:42 executed programs: 0
syzkaller login: [   33.532980] dev_remove_pack: ffff8801ccc78e00 not found
[   33.548373] ==================================================================
[   33.555776] BUG: KASAN: use-after-free in __dev_remove_pack+0x305/0x3b0
[   33.562499] Read of size 8 at addr ffff8801ccca71e8 by task syz-executor0/3091
[   33.569825] 
[   33.571426] CPU: 1 PID: 3091 Comm: syz-executor0 Not tainted 4.13.0+ #76
[   33.578234] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   33.587557] Call Trace:
[   33.590118]  dump_stack+0x194/0x257
[   33.593720]  ? arch_local_irq_restore+0x53/0x53
[   33.598363]  ? show_regs_print_info+0x65/0x65
[   33.602836]  ? __dev_remove_pack+0x305/0x3b0
[   33.607226]  print_address_description+0x73/0x250
[   33.612040]  ? __dev_remove_pack+0x305/0x3b0
[   33.616421]  kasan_report+0x24e/0x340
[   33.620196]  __asan_report_load8_noabort+0x14/0x20
[   33.625095]  __dev_remove_pack+0x305/0x3b0
[   33.629302]  ? dev_get_by_name_rcu+0x270/0x270
[   33.633857]  ? refcount_sub_and_test+0x115/0x1b0
[   33.638594]  __unregister_prot_hook+0x211/0x280
[   33.643239]  packet_release+0x8bb/0xd70
[   33.647193]  ? packet_set_ring+0x1b70/0x1b70
[   33.651575]  ? dentry_free+0xcd/0x130
[   33.655351]  ? rcu_read_lock_sched_held+0x108/0x120
[   33.660340]  ? kmem_cache_free+0x249/0x280
[   33.664547]  ? dentry_free+0xd2/0x130
[   33.668325]  ? locks_remove_file+0x3fa/0x5a0
[   33.672707]  ? fcntl_setlk+0x10d0/0x10d0
[   33.676742]  ? __fsnotify_parent+0xb4/0x3a0
[   33.681036]  ? fsnotify+0x1af0/0x1af0
[   33.684815]  sock_release+0x8d/0x1e0
[   33.688499]  ? sock_release+0x8d/0x1e0
[   33.692358]  ? sock_release+0x1e0/0x1e0
[   33.696305]  sock_close+0x16/0x20
[   33.699732]  __fput+0x333/0x7f0
[   33.702994]  ? fput+0x140/0x140
[   33.706251]  ? check_same_owner+0x320/0x320
[   33.710547]  ? _raw_spin_unlock_irq+0x27/0x70
[   33.715025]  ____fput+0x15/0x20
[   33.718279]  task_work_run+0x199/0x270
[   33.722141]  ? task_work_cancel+0x210/0x210
[   33.726435]  ? _raw_spin_unlock+0x22/0x30
[   33.730555]  ? switch_task_namespaces+0x87/0xc0
[   33.735199]  do_exit+0xa52/0x1b40
[   33.738622]  ? plist_check_list+0xa0/0xa0
[   33.742751]  ? plist_del+0x47b/0x990
[   33.746436]  ? mm_update_next_owner+0x930/0x930
[   33.751076]  ? plist_add+0x760/0x760
[   33.754772]  ? check_same_owner+0x320/0x320
[   33.759071]  ? find_held_lock+0x39/0x1d0
[   33.763111]  ? check_noncircular+0x20/0x20
[   33.767316]  ? lock_downgrade+0x990/0x990
[   33.771440]  ? refill_pi_state_cache.part.6+0x2f0/0x2f0
[   33.776793]  ? find_held_lock+0x39/0x1d0
[   33.780837]  ? lock_downgrade+0x990/0x990
[   33.784957]  ? recalc_sigpending_tsk+0x117/0x150
[   33.789687]  ? recalc_sigpending+0x103/0x160
[   33.794066]  ? recalc_sigpending_tsk+0x150/0x150
[   33.798790]  ? get_signal+0x397/0x17e0
[   33.802658]  do_group_exit+0x149/0x400
[   33.806516]  ? __lock_is_held+0xbc/0x140
[   33.810547]  ? SyS_exit+0x30/0x30
[   33.813970]  ? _raw_spin_unlock_irq+0x27/0x70
[   33.818439]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   33.823434]  get_signal+0x7e8/0x17e0
[   33.827148]  ? ptrace_notify+0x130/0x130
[   33.831182]  ? trace_hardirqs_on+0xd/0x10
[   33.835300]  ? _raw_spin_unlock_irq+0x27/0x70
[   33.839765]  ? __schedule+0x13cd/0x2070
[   33.843709]  ? lock_release+0xd70/0xd70
[   33.847664]  ? exit_robust_list+0x240/0x240
[   33.851972]  do_signal+0x94/0x1ee0
[   33.855494]  ? iterate_fd+0x3f0/0x3f0
[   33.859270]  ? setup_sigcontext+0x7d0/0x7d0
[   33.863571]  ? schedule+0x108/0x440
[   33.867172]  ? __schedule+0x2070/0x2070
[   33.871119]  ? __fget_light+0x29d/0x390
[   33.875069]  ? selinux_tun_dev_create+0xc0/0xc0
[   33.879714]  ? selinux_netlbl_socket_setsockopt+0x10c/0x460
[   33.885398]  ? selinux_netlbl_sock_rcv_skb+0x730/0x730
[   33.890650]  ? exit_to_usermode_loop+0x98/0x300
[   33.895299]  exit_to_usermode_loop+0x224/0x300
[   33.899869]  ? trace_event_raw_event_sys_exit+0x260/0x260
[   33.905392]  syscall_return_slowpath+0x42f/0x500
[   33.910122]  ? prepare_exit_to_usermode+0x2c0/0x2c0
[   33.915112]  ? entry_SYSCALL_64_fastpath+0x91/0xbe
[   33.920015]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   33.925014]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   33.929755]  entry_SYSCALL_64_fastpath+0xbc/0xbe
[   33.934481] RIP: 0033:0x451e59
[   33.937641] RSP: 002b:00007fb973434cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
[   33.945326] RAX: fffffffffffffe00 RBX: 0000000000718028 RCX: 0000000000451e59
[   33.952568] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000718028
[   33.959811] RBP: 0000000000718000 R08: 0000000000000000 R09: 0000000000000000
[   33.967054] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[   33.974296] R13: 00007ffee00a61cf R14: 00007fb9734359c0 R15: 0000000000000000
[   33.981559] 
[   33.983157] Allocated by task 3091:
[   33.986755]  save_stack_trace+0x16/0x20
[   33.990699]  save_stack+0x43/0xd0
[   33.994122]  kasan_kmalloc+0xad/0xe0
[   33.997804]  kmem_cache_alloc_trace+0x136/0x750
[   34.002446]  fanout_add+0xa50/0x1190
[   34.006128]  packet_setsockopt+0xfdc/0x1e80
[   34.010418]  SyS_setsockopt+0x189/0x360
[   34.014362]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   34.019086] 
[   34.020684] Freed by task 3091:
[   34.023932]  save_stack_trace+0x16/0x20
[   34.027880]  save_stack+0x43/0xd0
[   34.031303]  kasan_slab_free+0x71/0xc0
[   34.035164]  kfree+0xca/0x250
[   34.038241]  packet_release+0xa8f/0xd70
[   34.042183]  sock_release+0x8d/0x1e0
[   34.045865]  sock_close+0x16/0x20
[   34.049289]  __fput+0x333/0x7f0
[   34.052540]  ____fput+0x15/0x20
[   34.055790]  task_work_run+0x199/0x270
[   34.059649]  do_exit+0xa52/0x1b40
[   34.063070]  do_group_exit+0x149/0x400
[   34.066927]  get_signal+0x7e8/0x17e0
[   34.070610]  do_signal+0x94/0x1ee0
[   34.074120]  exit_to_usermode_loop+0x224/0x300
[   34.078671]  syscall_return_slowpath+0x42f/0x500
[   34.083399]  entry_SYSCALL_64_fastpath+0xbc/0xbe
[   34.088122] 
[   34.089722] The buggy address belongs to the object at ffff8801ccca6940
[   34.089722]  which belongs to the cache kmalloc-4096 of size 4096
[   34.102521] The buggy address is located 2216 bytes inside of
[   34.102521]  4096-byte region [ffff8801ccca6940, ffff8801ccca7940)
[   34.114539] The buggy address belongs to the page:
[   34.119439] page:ffffea0007332980 count:1 mapcount:0 mapping:ffff8801ccca6940 index:0x0 compound_mapcount: 0
[   34.129386] flags: 0x200000000008100(slab|head)
[   34.134026] raw: 0200000000008100 ffff8801ccca6940 0000000000000000 0000000100000001
[   34.141889] raw: ffffea0007332ca0 ffff8801dac01a50 ffff8801dac00dc0 0000000000000000
[   34.149737] page dumped because: kasan: bad access detected
[   34.155426] 
[   34.157023] Memory state around the buggy address:
[   34.161921]  ffff8801ccca7080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   34.169248]  ffff8801ccca7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   34.177107] >ffff8801ccca7180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   34.184436]                                                           ^
[   34.191170]  ffff8801ccca7200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   34.198498]  ffff8801ccca7280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   34.205826] ==================================================================
[   34.213158] Disabling lock debugging due to kernel taint
[   34.218650] Kernel panic - not syncing: panic_on_warn set ...
[   34.218650] 
[   34.225983] CPU: 1 PID: 3091 Comm: syz-executor0 Tainted: G    B           4.13.0+ #76
[   34.233999] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   34.243321] Call Trace:
[   34.245877]  dump_stack+0x194/0x257
[   34.249471]  ? arch_local_irq_restore+0x53/0x53
[   34.254106]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   34.258829]  ? __dev_remove_pack+0x2f0/0x3b0
[   34.263205]  panic+0x1e4/0x417
[   34.266364]  ? __warn+0x1d9/0x1d9
[   34.269789]  ? __dev_remove_pack+0x305/0x3b0
[   34.274162]  kasan_end_report+0x50/0x50
[   34.278100]  kasan_report+0x137/0x340
[   34.281865]  __asan_report_load8_noabort+0x14/0x20
[   34.286758]  __dev_remove_pack+0x305/0x3b0
[   34.290957]  ? dev_get_by_name_rcu+0x270/0x270
[   34.295506]  ? refcount_sub_and_test+0x115/0x1b0
[   34.300231]  __unregister_prot_hook+0x211/0x280
[   34.304868]  packet_release+0x8bb/0xd70
[   34.308823]  ? packet_set_ring+0x1b70/0x1b70
[   34.313198]  ? dentry_free+0xcd/0x130
[   34.316965]  ? rcu_read_lock_sched_held+0x108/0x120
[   34.321947]  ? kmem_cache_free+0x249/0x280
[   34.326146]  ? dentry_free+0xd2/0x130
[   34.329915]  ? locks_remove_file+0x3fa/0x5a0
[   34.334291]  ? fcntl_setlk+0x10d0/0x10d0
[   34.338320]  ? __fsnotify_parent+0xb4/0x3a0
[   34.342609]  ? fsnotify+0x1af0/0x1af0
[   34.346379]  sock_release+0x8d/0x1e0
[   34.350069]  ? sock_release+0x8d/0x1e0
[   34.353923]  ? sock_release+0x1e0/0x1e0
[   34.357871]  sock_close+0x16/0x20
[   34.361295]  __fput+0x333/0x7f0
[   34.364542]  ? fput+0x140/0x140
[   34.367789]  ? check_same_owner+0x320/0x320
[   34.372088]  ? _raw_spin_unlock_irq+0x27/0x70
[   34.376550]  ____fput+0x15/0x20
[   34.379795]  task_work_run+0x199/0x270
[   34.383651]  ? task_work_cancel+0x210/0x210
[   34.387938]  ? _raw_spin_unlock+0x22/0x30
[   34.392052]  ? switch_task_namespaces+0x87/0xc0
[   34.396688]  do_exit+0xa52/0x1b40
[   34.400107]  ? plist_check_list+0xa0/0xa0
[   34.404224]  ? plist_del+0x47b/0x990
[   34.407904]  ? mm_update_next_owner+0x930/0x930
[   34.412539]  ? plist_add+0x760/0x760
[   34.416222]  ? check_same_owner+0x320/0x320
[   34.420515]  ? find_held_lock+0x39/0x1d0
[   34.424547]  ? check_noncircular+0x20/0x20
[   34.428748]  ? lock_downgrade+0x990/0x990
[   34.432864]  ? refill_pi_state_cache.part.6+0x2f0/0x2f0
[   34.438206]  ? find_held_lock+0x39/0x1d0
[   34.442249]  ? lock_downgrade+0x990/0x990
[   34.446365]  ? recalc_sigpending_tsk+0x117/0x150
[   34.451087]  ? recalc_sigpending+0x103/0x160
[   34.455471]  ? recalc_sigpending_tsk+0x150/0x150
[   34.460204]  ? get_signal+0x397/0x17e0
[   34.464062]  do_group_exit+0x149/0x400
[   34.467915]  ? __lock_is_held+0xbc/0x140
[   34.471939]  ? SyS_exit+0x30/0x30
[   34.475358]  ? _raw_spin_unlock_irq+0x27/0x70
[   34.479818]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   34.484799]  get_signal+0x7e8/0x17e0
[   34.488492]  ? ptrace_notify+0x130/0x130
[   34.492520]  ? trace_hardirqs_on+0xd/0x10
[   34.496633]  ? _raw_spin_unlock_irq+0x27/0x70
[   34.501094]  ? __schedule+0x13cd/0x2070
[   34.505033]  ? lock_release+0xd70/0xd70
[   34.508976]  ? exit_robust_list+0x240/0x240
[   34.513273]  do_signal+0x94/0x1ee0
[   34.516782]  ? iterate_fd+0x3f0/0x3f0
[   34.520549]  ? setup_sigcontext+0x7d0/0x7d0
[   34.524839]  ? schedule+0x108/0x440
[   34.528435]  ? __schedule+0x2070/0x2070
[   34.532377]  ? __fget_light+0x29d/0x390