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-9,10.128.15.199' (ECDSA) to the list of known hosts.
2017/09/04 07:25:02 parsed 1 programs
2017/09/04 07:25:02 executed programs: 0
2017/09/04 07:25:07 executed programs: 96
syzkaller login: [   49.421720] dev_remove_pack: ffff8801ce5f98c0 not found
[   49.435251] ==================================================================
[   49.436342] BUG: KASAN: use-after-free in __dev_remove_pack+0x305/0x3b0
[   49.437230] Read of size 8 at addr ffff8801ce4d8ae8 by task syz-executor0/3426
[   49.438217] 
[   49.438449] CPU: 0 PID: 3426 Comm: syz-executor0 Not tainted 4.13.0-rc7+ #65
[   49.439396] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   49.440622] Call Trace:
[   49.440978]  dump_stack+0x194/0x257
[   49.441489]  ? arch_local_irq_restore+0x53/0x53
[   49.443799]  ? show_regs_print_info+0x65/0x65
[   49.448271]  ? __dev_remove_pack+0x305/0x3b0
[   49.452648]  print_address_description+0x73/0x250
[   49.457461]  ? __dev_remove_pack+0x305/0x3b0
[   49.461837]  kasan_report+0x24e/0x340
[   49.465611]  __asan_report_load8_noabort+0x14/0x20
[   49.470506]  __dev_remove_pack+0x305/0x3b0
[   49.474710]  ? dev_get_by_name_rcu+0x270/0x270
[   49.479269]  ? refcount_sub_and_test+0x115/0x1b0
[   49.484003]  __unregister_prot_hook+0x211/0x280
[   49.488644]  packet_release+0x8bb/0xd70
[   49.492591]  ? packet_set_ring+0x1b70/0x1b70
[   49.496965]  ? dentry_free+0xcd/0x130
[   49.500733]  ? rcu_read_lock_sched_held+0x108/0x120
[   49.505716]  ? kmem_cache_free+0x249/0x280
[   49.509921]  ? dentry_free+0xd2/0x130
[   49.513696]  ? locks_remove_file+0x414/0x560
[   49.518074]  ? fcntl_setlk+0x10c0/0x10c0
[   49.522103]  ? __fsnotify_parent+0xb4/0x3a0
[   49.526398]  ? fsnotify+0x1af0/0x1af0
[   49.530172]  sock_release+0x8d/0x1e0
[   49.533850]  ? sock_release+0x8d/0x1e0
[   49.537706]  ? sock_release+0x1e0/0x1e0
[   49.541646]  sock_close+0x16/0x20
[   49.545068]  __fput+0x327/0x7e0
[   49.548318]  ? fput+0x140/0x140
[   49.551567]  ? check_same_owner+0x320/0x320
[   49.555852]  ? do_raw_spin_trylock+0x190/0x190
[   49.560405]  ? check_same_owner+0x320/0x320
[   49.564695]  ____fput+0x15/0x20
[   49.567943]  task_work_run+0x18a/0x260
[   49.571799]  ? task_work_cancel+0x210/0x210
[   49.576090]  ? _raw_spin_unlock+0x22/0x30
[   49.580216]  ? switch_task_namespaces+0x87/0xc0
[   49.584856]  do_exit+0xa3a/0x1b10
[   49.588280]  ? debug_check_no_locks_freed+0x3c0/0x3c0
[   49.593436]  ? plist_check_list+0xa0/0xa0
[   49.597552]  ? plist_add+0x5cb/0x760
[   49.601244]  ? mm_update_next_owner+0x930/0x930
[   49.605882]  ? plist_add+0x760/0x760
[   49.609567]  ? check_noncircular+0x20/0x20
[   49.613769]  ? check_same_owner+0x320/0x320
[   49.618058]  ? lock_acquire+0x1d5/0x580
[   49.621998]  ? futex_wait_setup+0x14a/0x3d0
[   49.626290]  ? __might_sleep+0x95/0x190
[   49.630246]  ? check_noncircular+0x20/0x20
[   49.634446]  ? futex_wait+0x43e/0xa00
[   49.638221]  ? do_raw_spin_trylock+0x190/0x190
[   49.642767]  ? fault_in_user_writeable+0x90/0x90
[   49.647495]  ? find_held_lock+0x35/0x1d0
[   49.651527]  ? get_signal+0x855/0x17e0
[   49.655381]  ? lock_downgrade+0x990/0x990
[   49.659505]  do_group_exit+0x149/0x400
[   49.663360]  ? __lock_is_held+0xb6/0x140
[   49.667391]  ? SyS_exit+0x30/0x30
[   49.670812]  ? _raw_spin_unlock_irq+0x27/0x70
[   49.675276]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   49.680265]  get_signal+0x7e8/0x17e0
[   49.683972]  ? ptrace_notify+0x130/0x130
[   49.688000]  ? lock_downgrade+0x990/0x990
[   49.692116]  ? lock_release+0xa40/0xa40
[   49.696065]  ? exit_robust_list+0x240/0x240
[   49.700367]  do_signal+0x94/0x1ee0
[   49.703885]  ? iterate_fd+0x3f0/0x3f0
[   49.707652]  ? lock_downgrade+0x990/0x990
[   49.711770]  ? setup_sigcontext+0x7d0/0x7d0
[   49.716063]  ? __lock_is_held+0xb6/0x140
[   49.720105]  ? selinux_tun_dev_create+0xc0/0xc0
[   49.724743]  ? selinux_netlbl_socket_setsockopt+0x10c/0x460
[   49.730423]  ? selinux_netlbl_sock_rcv_skb+0x730/0x730
[   49.735669]  ? alloc_file+0x27e/0x390
[   49.739436]  ? exit_to_usermode_loop+0x98/0x300
[   49.744077]  exit_to_usermode_loop+0x224/0x300
[   49.748629]  ? trace_event_raw_event_sys_exit+0x260/0x260
[   49.754141]  syscall_return_slowpath+0x3a7/0x450
[   49.758867]  ? prepare_exit_to_usermode+0x220/0x220
[   49.763849]  ? entry_SYSCALL_64_fastpath+0x91/0xbe
[   49.768745]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   49.773729]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   49.778454]  entry_SYSCALL_64_fastpath+0xbc/0xbe
[   49.783175] RIP: 0033:0x451e59
[   49.786330] RSP: 002b:00007fc274c71cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
[   49.794003] RAX: fffffffffffffe00 RBX: 00000000007180d8 RCX: 0000000000451e59
[   49.801237] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000007180d8
[   49.808473] RBP: 00000000007180b0 R08: 0000000000000000 R09: 0000000000000000
[   49.815708] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[   49.822943] R13: 0000000000a6f7ef R14: 00007fc274c729c0 R15: 0000000000000002
[   49.830194] 
[   49.831789] Allocated by task 3425:
[   49.835388]  save_stack_trace+0x16/0x20
[   49.839327]  save_stack+0x43/0xd0
[   49.842745]  kasan_kmalloc+0xad/0xe0
[   49.846435]  kmem_cache_alloc_trace+0x12f/0x740
[   49.851070]  fanout_add+0xa50/0x1190
[   49.854748]  packet_setsockopt+0xfdc/0x1e80
[   49.859044]  SyS_setsockopt+0x189/0x360
[   49.862983]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   49.867707] 
[   49.869301] Freed by task 3426:
[   49.872549]  save_stack_trace+0x16/0x20
[   49.876489]  save_stack+0x43/0xd0
[   49.879906]  kasan_slab_free+0x71/0xc0
[   49.883759]  kfree+0xca/0x250
[   49.886831]  packet_release+0xa8f/0xd70
[   49.890768]  sock_release+0x8d/0x1e0
[   49.894445]  sock_close+0x16/0x20
[   49.897864]  __fput+0x327/0x7e0
[   49.901106]  ____fput+0x15/0x20
[   49.904352]  task_work_run+0x18a/0x260
[   49.908207]  do_exit+0xa3a/0x1b10
[   49.911624]  do_group_exit+0x149/0x400
[   49.915477]  get_signal+0x7e8/0x17e0
[   49.919159]  do_signal+0x94/0x1ee0
[   49.922666]  exit_to_usermode_loop+0x224/0x300
[   49.927212]  syscall_return_slowpath+0x3a7/0x450
[   49.931932]  entry_SYSCALL_64_fastpath+0xbc/0xbe
[   49.936659] 
[   49.938255] The buggy address belongs to the object at ffff8801ce4d8240
[   49.938255]  which belongs to the cache kmalloc-4096 of size 4096
[   49.951047] The buggy address is located 2216 bytes inside of
[   49.951047]  4096-byte region [ffff8801ce4d8240, ffff8801ce4d9240)
[   49.963062] The buggy address belongs to the page:
[   49.967957] page:ffffea0007393600 count:1 mapcount:0 mapping:ffff8801ce4d8240 index:0x0 compound_mapcount: 0
[   49.977888] flags: 0x200000000008100(slab|head)
[   49.982523] raw: 0200000000008100 ffff8801ce4d8240 0000000000000000 0000000100000001
[   49.990890] raw: ffffea00073a0420 ffffea00073934a0 ffff8801dac00dc0 0000000000000000
[   49.998732] page dumped because: kasan: bad access detected
[   50.004402] 
[   50.005994] Memory state around the buggy address:
[   50.010884]  ffff8801ce4d8980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   50.018204]  ffff8801ce4d8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   50.025546] >ffff8801ce4d8a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   50.032869]                                                           ^
[   50.039586]  ffff8801ce4d8b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   50.046908]  ffff8801ce4d8b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   50.054228] ==================================================================
[   50.061548] Disabling lock debugging due to kernel taint
[   50.067050] Kernel panic - not syncing: panic_on_warn set ...
[   50.067050] 
[   50.074397] CPU: 0 PID: 3426 Comm: syz-executor0 Tainted: G    B           4.13.0-rc7+ #65
[   50.082774] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   50.092091] Call Trace:
[   50.094652]  dump_stack+0x194/0x257
[   50.098244]  ? arch_local_irq_restore+0x53/0x53
[   50.102879]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   50.107602]  ? __dev_remove_pack+0x2c0/0x3b0
[   50.111973]  panic+0x1e4/0x417
[   50.115129]  ? __warn+0x1d9/0x1d9
[   50.118549]  ? __dev_remove_pack+0x305/0x3b0
[   50.122923]  kasan_end_report+0x50/0x50
[   50.126861]  kasan_report+0x137/0x340
[   50.130625]  __asan_report_load8_noabort+0x14/0x20
[   50.135515]  __dev_remove_pack+0x305/0x3b0
[   50.139712]  ? dev_get_by_name_rcu+0x270/0x270
[   50.144259]  ? refcount_sub_and_test+0x115/0x1b0
[   50.148982]  __unregister_prot_hook+0x211/0x280
[   50.153618]  packet_release+0x8bb/0xd70
[   50.157561]  ? packet_set_ring+0x1b70/0x1b70
[   50.161935]  ? dentry_free+0xcd/0x130
[   50.165702]  ? rcu_read_lock_sched_held+0x108/0x120
[   50.170680]  ? kmem_cache_free+0x249/0x280
[   50.174878]  ? dentry_free+0xd2/0x130
[   50.178661]  ? locks_remove_file+0x414/0x560
[   50.183033]  ? fcntl_setlk+0x10c0/0x10c0
[   50.187060]  ? __fsnotify_parent+0xb4/0x3a0
[   50.191345]  ? fsnotify+0x1af0/0x1af0
[   50.195111]  sock_release+0x8d/0x1e0
[   50.198790]  ? sock_release+0x8d/0x1e0
[   50.202641]  ? sock_release+0x1e0/0x1e0
[   50.206578]  sock_close+0x16/0x20
[   50.209998]  __fput+0x327/0x7e0
[   50.213244]  ? fput+0x140/0x140
[   50.216492]  ? check_same_owner+0x320/0x320
[   50.220776]  ? do_raw_spin_trylock+0x190/0x190
[   50.225324]  ? check_same_owner+0x320/0x320
[   50.229611]  ____fput+0x15/0x20
[   50.232857]  task_work_run+0x18a/0x260
[   50.236709]  ? task_work_cancel+0x210/0x210
[   50.240998]  ? _raw_spin_unlock+0x22/0x30
[   50.245107]  ? switch_task_namespaces+0x87/0xc0
[   50.249744]  do_exit+0xa3a/0x1b10
[   50.253164]  ? debug_check_no_locks_freed+0x3c0/0x3c0
[   50.258325]  ? plist_check_list+0xa0/0xa0
[   50.262436]  ? plist_add+0x5cb/0x760
[   50.266116]  ? mm_update_next_owner+0x930/0x930
[   50.270749]  ? plist_add+0x760/0x760
[   50.274429]  ? check_noncircular+0x20/0x20
[   50.278630]  ? check_same_owner+0x320/0x320
[   50.282914]  ? lock_acquire+0x1d5/0x580
[   50.286865]  ? futex_wait_setup+0x14a/0x3d0
[   50.291152]  ? __might_sleep+0x95/0x190
[   50.295098]  ? check_noncircular+0x20/0x20
[   50.299294]  ? futex_wait+0x43e/0xa00
[   50.303062]  ? do_raw_spin_trylock+0x190/0x190
[   50.307607]  ? fault_in_user_writeable+0x90/0x90
[   50.312330]  ? find_held_lock+0x35/0x1d0
[   50.316370]  ? get_signal+0x855/0x17e0
[   50.320219]  ? lock_downgrade+0x990/0x990
[   50.324335]  do_group_exit+0x149/0x400
[   50.328187]  ? __lock_is_held+0xb6/0x140
[   50.332216]  ? SyS_exit+0x30/0x30
[   50.335633]  ? _raw_spin_unlock_irq+0x27/0x70
[   50.340093]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   50.345073]  get_signal+0x7e8/0x17e0
[   50.348763]  ? ptrace_notify+0x130/0x130
[   50.352787]  ? lock_downgrade+0x990/0x990
[   50.356897]  ? lock_release+0xa40/0xa40
[   50.360835]  ? exit_robust_list+0x240/0x240
[   50.365128]  do_signal+0x94/0x1ee0
[   50.368636]  ? iterate_fd+0x3f0/0x3f0
[   50.372397]  ? lock_downgrade+0x990/0x990
[   50.376509]  ? setup_sigcontext+0x7d0/0x7d0
[   50.380795]  ? __lock_is_held+0xb6/0x140
[   50.384826]  ? selinux_tun_dev_create+0xc0/0xc0
[   50.389459]  ? selinux_netlbl_socket_setsockopt+0x10c/0x460
[   50.395134]  ? selinux_netlbl_sock_rcv_skb+0x730/0x730
[   50.400376]  ? alloc_file+0x27e/0x390
[   50.404143]  ? exit_to_usermode_loop+0x98/0x300
[   50.408782]  exit_to_usermode_loop+0x224/0x300
[   50.413329]  ? trace_event_raw_event_sys_exit+0x260/0x260
[   50.418832]  syscall_return_slowpath+0x3a7/0x450