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-7,10.128.0.55' (ECDSA) to the list of known hosts.
2017/09/07 06:23:11 parsed 1 programs
2017/09/07 06:23:11 executed programs: 0
2017/09/07 06:23:16 executed programs: 148
syzkaller login: [   68.415869] dev_remove_pack: ffff8801c9c828c0 not found
[   68.429332] ==================================================================
[   68.436705] BUG: KASAN: use-after-free in __dev_remove_pack+0x305/0x3b0
[   68.443437] Read of size 8 at addr ffff8801c9c73128 by task syz-executor0/3697
[   68.450767] 
[   68.452372] CPU: 0 PID: 3697 Comm: syz-executor0 Not tainted 4.13.0+ #71
[   68.459194] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   68.468563] Call Trace:
[   68.471135]  dump_stack+0x194/0x257
[   68.474756]  ? arch_local_irq_restore+0x53/0x53
[   68.479400]  ? show_regs_print_info+0x65/0x65
[   68.483878]  ? __dev_remove_pack+0x305/0x3b0
[   68.488281]  print_address_description+0x73/0x250
[   68.493100]  ? __dev_remove_pack+0x305/0x3b0
[   68.497491]  kasan_report+0x24e/0x340
[   68.501271]  __asan_report_load8_noabort+0x14/0x20
[   68.506173]  __dev_remove_pack+0x305/0x3b0
[   68.510381]  ? dev_get_by_name_rcu+0x270/0x270
[   68.514947]  ? refcount_sub_and_test+0x115/0x1b0
[   68.519695]  __unregister_prot_hook+0x211/0x280
[   68.524342]  packet_release+0x8bb/0xd70
[   68.528299]  ? packet_set_ring+0x1b70/0x1b70
[   68.532684]  ? dentry_free+0xcd/0x130
[   68.536461]  ? rcu_read_lock_sched_held+0x108/0x120
[   68.541451]  ? kmem_cache_free+0x249/0x280
[   68.545661]  ? dentry_free+0xd2/0x130
[   68.549445]  ? locks_remove_file+0x3fa/0x5a0
[   68.553831]  ? fcntl_setlk+0x10d0/0x10d0
[   68.557869]  ? __fsnotify_parent+0xb4/0x3a0
[   68.562169]  ? fsnotify+0x1af0/0x1af0
[   68.565950]  sock_release+0x8d/0x1e0
[   68.569639]  ? sock_release+0x8d/0x1e0
[   68.573500]  ? sock_release+0x1e0/0x1e0
[   68.577443]  sock_close+0x16/0x20
[   68.580868]  __fput+0x333/0x7f0
[   68.584126]  ? fput+0x140/0x140
[   68.587380]  ? check_same_owner+0x320/0x320
[   68.591675]  ? _raw_spin_unlock_irq+0x27/0x70
[   68.596155]  ____fput+0x15/0x20
[   68.599418]  task_work_run+0x199/0x270
[   68.603292]  ? task_work_cancel+0x210/0x210
[   68.607605]  ? _raw_spin_unlock+0x22/0x30
[   68.611734]  ? switch_task_namespaces+0x87/0xc0
[   68.616386]  do_exit+0xa52/0x1b40
[   68.619811]  ? plist_check_list+0xa0/0xa0
[   68.624038]  ? plist_del+0x47b/0x990
[   68.627730]  ? mm_update_next_owner+0x930/0x930
[   68.632378]  ? plist_add+0x760/0x760
[   68.636083]  ? check_same_owner+0x320/0x320
[   68.640404]  ? find_held_lock+0x39/0x1d0
[   68.644454]  ? check_noncircular+0x20/0x20
[   68.648672]  ? lock_downgrade+0x990/0x990
[   68.652807]  ? refill_pi_state_cache.part.6+0x2f0/0x2f0
[   68.658175]  ? find_held_lock+0x39/0x1d0
[   68.662226]  ? lock_downgrade+0x990/0x990
[   68.666353]  ? recalc_sigpending_tsk+0x117/0x150
[   68.671088]  ? recalc_sigpending+0x103/0x160
[   68.675476]  ? recalc_sigpending_tsk+0x150/0x150
[   68.680205]  ? get_signal+0x397/0x17e0
[   68.684088]  do_group_exit+0x149/0x400
[   68.687953]  ? __lock_is_held+0xbc/0x140
[   68.691990]  ? SyS_exit+0x30/0x30
[   68.695419]  ? _raw_spin_unlock_irq+0x27/0x70
[   68.699910]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   68.704923]  get_signal+0x7e8/0x17e0
[   68.708651]  ? ptrace_notify+0x130/0x130
[   68.712697]  ? __fget+0xbb/0x580
[   68.716042]  ? __lockdep_init_map+0xe4/0x650
[   68.720456]  ? lock_release+0xd70/0xd70
[   68.724512]  ? exit_robust_list+0x240/0x240
[   68.728826]  do_signal+0x94/0x1ee0
[   68.732348]  ? iterate_fd+0x3f0/0x3f0
[   68.736140]  ? setup_sigcontext+0x7d0/0x7d0
[   68.740442]  ? __lock_is_held+0xbc/0x140
[   68.744490]  ? __fget_light+0x29d/0x390
[   68.748444]  ? selinux_tun_dev_create+0xc0/0xc0
[   68.753094]  ? selinux_netlbl_socket_setsockopt+0x10c/0x460
[   68.758782]  ? selinux_netlbl_sock_rcv_skb+0x730/0x730
[   68.764032]  ? alloc_file+0x284/0x3a0
[   68.767808]  ? exit_to_usermode_loop+0x98/0x300
[   68.772476]  exit_to_usermode_loop+0x224/0x300
[   68.777046]  ? trace_event_raw_event_sys_exit+0x260/0x260
[   68.782569]  syscall_return_slowpath+0x42f/0x500
[   68.787303]  ? prepare_exit_to_usermode+0x2c0/0x2c0
[   68.792304]  ? entry_SYSCALL_64_fastpath+0x91/0xbe
[   68.797214]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   68.802209]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   68.806969]  entry_SYSCALL_64_fastpath+0xbc/0xbe
[   68.811700] RIP: 0033:0x451e59
[   68.814862] RSP: 002b:00007f261277acf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
[   68.822545] RAX: fffffffffffffe00 RBX: 0000000000718028 RCX: 0000000000451e59
[   68.829797] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000718028
[   68.837048] RBP: 0000000000718000 R08: 0000000000000000 R09: 0000000000000000
[   68.844292] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[   68.851535] R13: 00007fff5556774f R14: 00007f261277b9c0 R15: 0000000000000000
[   68.858801] 
[   68.860411] Allocated by task 3697:
[   68.864016]  save_stack_trace+0x16/0x20
[   68.867967]  save_stack+0x43/0xd0
[   68.871390]  kasan_kmalloc+0xad/0xe0
[   68.875089]  kmem_cache_alloc_trace+0x136/0x750
[   68.879740]  fanout_add+0xa50/0x1190
[   68.883432]  packet_setsockopt+0xfdc/0x1e80
[   68.887731]  SyS_setsockopt+0x189/0x360
[   68.891679]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   68.896405] 
[   68.898011] Freed by task 3697:
[   68.901264]  save_stack_trace+0x16/0x20
[   68.905210]  save_stack+0x43/0xd0
[   68.908635]  kasan_slab_free+0x71/0xc0
[   68.912496]  kfree+0xca/0x250
[   68.915574]  packet_release+0xa8f/0xd70
[   68.919529]  sock_release+0x8d/0x1e0
[   68.923215]  sock_close+0x16/0x20
[   68.926641]  __fput+0x333/0x7f0
[   68.929895]  ____fput+0x15/0x20
[   68.933149]  task_work_run+0x199/0x270
[   68.937012]  do_exit+0xa52/0x1b40
[   68.940438]  do_group_exit+0x149/0x400
[   68.944300]  get_signal+0x7e8/0x17e0
[   68.947998]  do_signal+0x94/0x1ee0
[   68.951513]  exit_to_usermode_loop+0x224/0x300
[   68.956068]  syscall_return_slowpath+0x42f/0x500
[   68.960801]  entry_SYSCALL_64_fastpath+0xbc/0xbe
[   68.965525] 
[   68.967126] The buggy address belongs to the object at ffff8801c9c72880
[   68.967126]  which belongs to the cache kmalloc-4096 of size 4096
[   68.979939] The buggy address is located 2216 bytes inside of
[   68.979939]  4096-byte region [ffff8801c9c72880, ffff8801c9c73880)
[   68.991982] The buggy address belongs to the page:
[   68.996889] page:ffffea0007271c80 count:1 mapcount:0 mapping:ffff8801c9c72880 index:0x0 compound_mapcount: 0
[   69.006839] flags: 0x200000000008100(slab|head)
[   69.011482] raw: 0200000000008100 ffff8801c9c72880 0000000000000000 0000000100000001
[   69.019337] raw: ffffea0007271c20 ffffea0007271920 ffff8801dac00dc0 0000000000000000
[   69.027190] page dumped because: kasan: bad access detected
[   69.032878] 
[   69.034478] Memory state around the buggy address:
[   69.039380]  ffff8801c9c73000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   69.046712]  ffff8801c9c73080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   69.054045] >ffff8801c9c73100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   69.061375]                                   ^
[   69.066020]  ffff8801c9c73180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   69.073359]  ffff8801c9c73200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   69.080691] ==================================================================
[   69.088030] Disabling lock debugging due to kernel taint
[   69.093535] Kernel panic - not syncing: panic_on_warn set ...
[   69.093535] 
[   69.100886] CPU: 0 PID: 3697 Comm: syz-executor0 Tainted: G    B           4.13.0+ #71
[   69.108905] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   69.118227] Call Trace:
[   69.120786]  dump_stack+0x194/0x257
[   69.124385]  ? arch_local_irq_restore+0x53/0x53
[   69.129025]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   69.133753]  ? __dev_remove_pack+0x240/0x3b0
[   69.138131]  panic+0x1e4/0x417
[   69.141289]  ? __warn+0x1d9/0x1d9
[   69.144720]  ? __dev_remove_pack+0x305/0x3b0
[   69.149096]  kasan_end_report+0x50/0x50
[   69.153036]  kasan_report+0x137/0x340
[   69.156813]  __asan_report_load8_noabort+0x14/0x20
[   69.161719]  __dev_remove_pack+0x305/0x3b0
[   69.165921]  ? dev_get_by_name_rcu+0x270/0x270
[   69.170471]  ? refcount_sub_and_test+0x115/0x1b0
[   69.175202]  __unregister_prot_hook+0x211/0x280
[   69.179843]  packet_release+0x8bb/0xd70
[   69.183797]  ? packet_set_ring+0x1b70/0x1b70
[   69.188173]  ? dentry_free+0xcd/0x130
[   69.191941]  ? rcu_read_lock_sched_held+0x108/0x120
[   69.196923]  ? kmem_cache_free+0x249/0x280
[   69.201129]  ? dentry_free+0xd2/0x130
[   69.204904]  ? locks_remove_file+0x3fa/0x5a0
[   69.209284]  ? fcntl_setlk+0x10d0/0x10d0
[   69.213325]  ? __fsnotify_parent+0xb4/0x3a0
[   69.217621]  ? fsnotify+0x1af0/0x1af0
[   69.221394]  sock_release+0x8d/0x1e0
[   69.225073]  ? sock_release+0x8d/0x1e0
[   69.228929]  ? sock_release+0x1e0/0x1e0
[   69.232867]  sock_close+0x16/0x20
[   69.236297]  __fput+0x333/0x7f0
[   69.239546]  ? fput+0x140/0x140
[   69.242793]  ? check_same_owner+0x320/0x320
[   69.247092]  ? _raw_spin_unlock_irq+0x27/0x70
[   69.251558]  ____fput+0x15/0x20
[   69.254811]  task_work_run+0x199/0x270
[   69.258676]  ? task_work_cancel+0x210/0x210
[   69.262972]  ? _raw_spin_unlock+0x22/0x30
[   69.267091]  ? switch_task_namespaces+0x87/0xc0
[   69.271737]  do_exit+0xa52/0x1b40
[   69.275160]  ? plist_check_list+0xa0/0xa0
[   69.279282]  ? plist_del+0x47b/0x990
[   69.282965]  ? mm_update_next_owner+0x930/0x930
[   69.287602]  ? plist_add+0x760/0x760
[   69.291292]  ? check_same_owner+0x320/0x320
[   69.295583]  ? find_held_lock+0x39/0x1d0
[   69.299616]  ? check_noncircular+0x20/0x20
[   69.303816]  ? lock_downgrade+0x990/0x990
[   69.307931]  ? refill_pi_state_cache.part.6+0x2f0/0x2f0
[   69.313285]  ? find_held_lock+0x39/0x1d0
[   69.317321]  ? lock_downgrade+0x990/0x990
[   69.321439]  ? recalc_sigpending_tsk+0x117/0x150
[   69.326165]  ? recalc_sigpending+0x103/0x160
[   69.330549]  ? recalc_sigpending_tsk+0x150/0x150
[   69.335276]  ? get_signal+0x397/0x17e0
[   69.339142]  do_group_exit+0x149/0x400
[   69.342998]  ? __lock_is_held+0xbc/0x140
[   69.347035]  ? SyS_exit+0x30/0x30
[   69.350457]  ? _raw_spin_unlock_irq+0x27/0x70
[   69.354920]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   69.359906]  get_signal+0x7e8/0x17e0
[   69.363606]  ? ptrace_notify+0x130/0x130
[   69.367633]  ? __fget+0xbb/0x580
[   69.370968]  ? __lockdep_init_map+0xe4/0x650
[   69.375345]  ? lock_release+0xd70/0xd70
[   69.379302]  ? exit_robust_list+0x240/0x240
[   69.384033]  do_signal+0x94/0x1ee0
[   69.387544]  ? iterate_fd+0x3f0/0x3f0
[   69.391312]  ? setup_sigcontext+0x7d0/0x7d0
[   69.395599]  ? __lock_is_held+0xbc/0x140
[   69.399633]  ? __fget_light+0x29d/0x390
[   69.403576]  ? selinux_tun_dev_create+0xc0/0xc0
[   69.408211]  ? selinux_netlbl_socket_setsockopt+0x10c/0x460
[   69.413890]  ? selinux_netlbl_sock_rcv_skb+0x730/0x730