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-5,10.128.15.210' (ECDSA) to the list of known hosts.
2017/09/03 21:17:07 parsed 1 programs
2017/09/03 21:17:07 executed programs: 0
syzkaller login: [   48.341238] dev_remove_pack: ffff8801c7daddc0 not found
[   48.741416] ==================================================================
[   48.748841] BUG: KASAN: use-after-free in __list_add_valid+0xb1/0xd0
[   48.755311] Read of size 8 at addr ffff8801c8ce51f0 by task syz-executor0/4227
[   48.762679] 
[   48.764286] CPU: 0 PID: 4227 Comm: syz-executor0 Not tainted 4.13.0-rc7+ #65
[   48.771436] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   48.780756] Call Trace:
[   48.783316]  dump_stack+0x194/0x257
[   48.786921]  ? arch_local_irq_restore+0x53/0x53
[   48.791562]  ? show_regs_print_info+0x65/0x65
[   48.796026]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   48.801022]  ? __list_add_valid+0xb1/0xd0
[   48.805143]  print_address_description+0x73/0x250
[   48.809953]  ? __list_add_valid+0xb1/0xd0
[   48.814072]  kasan_report+0x24e/0x340
[   48.817847]  __asan_report_load8_noabort+0x14/0x20
[   48.822743]  __list_add_valid+0xb1/0xd0
[   48.826689]  dev_add_pack+0x113/0x2b0
[   48.830456]  ? napi_skb_free_stolen_head+0x170/0x170
[   48.835531]  ? lockdep_init_map+0xe4/0x650
[   48.839741]  register_prot_hook.part.49+0x95/0xb0
[   48.844554]  packet_create+0x81a/0xb00
[   48.848413]  ? register_prot_hook.part.49+0xb0/0xb0
[   48.853400]  ? __sock_create+0x46e/0x850
[   48.857432]  ? lock_downgrade+0x990/0x990
[   48.861553]  ? lock_release+0xa40/0xa40
[   48.865502]  ? __lock_is_held+0xb6/0x140
[   48.869552]  __sock_create+0x4d4/0x850
[   48.873413]  ? ___sys_recvmsg+0x620/0x620
[   48.877550]  SyS_socket+0xeb/0x200
[   48.881059]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   48.885868]  ? move_addr_to_kernel+0x60/0x60
[   48.890243]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   48.895230]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   48.899960]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   48.904681] RIP: 0033:0x451e59
[   48.907840] RSP: 002b:00007f7c22bc0c08 EFLAGS: 00000216 ORIG_RAX: 0000000000000029
[   48.915515] RAX: ffffffffffffffda RBX: 0000000000718000 RCX: 0000000000451e59
[   48.922751] RDX: 0000000000000008 RSI: 0000000000080003 RDI: 0000000000000011
[   48.929987] RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000
[   48.937227] R10: 0000000000000000 R11: 0000000000000216 R12: 00000000004bb419
[   48.944462] R13: 00000000ffffffff R14: ffffffffffffffff R15: 0000000000000001
[   48.951719] 
[   48.953315] Allocated by task 4087:
[   48.956912]  save_stack_trace+0x16/0x20
[   48.960857]  save_stack+0x43/0xd0
[   48.964275]  kasan_kmalloc+0xad/0xe0
[   48.967961]  kmem_cache_alloc_trace+0x12f/0x740
[   48.972598]  fanout_add+0xa50/0x1190
[   48.976275]  packet_setsockopt+0xfdc/0x1e80
[   48.980563]  SyS_setsockopt+0x189/0x360
[   48.984505]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   48.989225] 
[   48.990818] Freed by task 4232:
[   48.994063]  save_stack_trace+0x16/0x20
[   48.998005]  save_stack+0x43/0xd0
[   49.001429]  kasan_slab_free+0x71/0xc0
[   49.005284]  kfree+0xca/0x250
[   49.008356]  packet_release+0xa8f/0xd70
[   49.012297]  sock_release+0x8d/0x1e0
[   49.015975]  sock_close+0x16/0x20
[   49.019398]  __fput+0x327/0x7e0
[   49.022641]  ____fput+0x15/0x20
[   49.025891]  task_work_run+0x18a/0x260
[   49.029744]  do_exit+0xa3a/0x1b10
[   49.033163]  do_group_exit+0x149/0x400
[   49.037021]  get_signal+0x7e8/0x17e0
[   49.040707]  do_signal+0x94/0x1ee0
[   49.044217]  exit_to_usermode_loop+0x224/0x300
[   49.048763]  syscall_return_slowpath+0x3a7/0x450
[   49.053484]  entry_SYSCALL_64_fastpath+0xbc/0xbe
[   49.058204] 
[   49.059800] The buggy address belongs to the object at ffff8801c8ce4940
[   49.059800]  which belongs to the cache kmalloc-4096 of size 4096
[   49.072596] The buggy address is located 2224 bytes inside of
[   49.072596]  4096-byte region [ffff8801c8ce4940, ffff8801c8ce5940)
[   49.084606] The buggy address belongs to the page:
[   49.089500] page:ffffea0007233900 count:1 mapcount:0 mapping:ffff8801c8ce4940 index:0x0 compound_mapcount: 0
[   49.099435] flags: 0x200000000008100(slab|head)
[   49.104073] raw: 0200000000008100 ffff8801c8ce4940 0000000000000000 0000000100000001
[   49.111927] raw: ffffea000725fc20 ffffea0007233a20 ffff8801dac00dc0 0000000000000000
[   49.119771] page dumped because: kasan: bad access detected
[   49.125443] 
[   49.127043] Memory state around the buggy address:
[   49.131938]  ffff8801c8ce5080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   49.139261]  ffff8801c8ce5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   49.146585] >ffff8801c8ce5180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   49.153908]                                                              ^
[   49.160884]  ffff8801c8ce5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   49.168209]  ffff8801c8ce5280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   49.175531] ==================================================================
[   49.182859] Disabling lock debugging due to kernel taint
[   49.188412] Kernel panic - not syncing: panic_on_warn set ...
[   49.188412] 
[   49.195743] CPU: 0 PID: 4227 Comm: syz-executor0 Tainted: G    B           4.13.0-rc7+ #65
[   49.204110] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   49.213441] Call Trace:
[   49.216004]  dump_stack+0x194/0x257
[   49.219604]  ? arch_local_irq_restore+0x53/0x53
[   49.224242]  ? kasan_end_report+0x32/0x50
[   49.228359]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   49.233087]  ? __list_add_valid+0x50/0xd0
[   49.237204]  panic+0x1e4/0x417
[   49.240364]  ? __warn+0x1d9/0x1d9
[   49.243792]  ? __list_add_valid+0xb1/0xd0
[   49.247907]  kasan_end_report+0x50/0x50
[   49.251850]  kasan_report+0x137/0x340
[   49.255620]  __asan_report_load8_noabort+0x14/0x20
[   49.260514]  __list_add_valid+0xb1/0xd0
[   49.264455]  dev_add_pack+0x113/0x2b0
[   49.268221]  ? napi_skb_free_stolen_head+0x170/0x170
[   49.273291]  ? lockdep_init_map+0xe4/0x650
[   49.277496]  register_prot_hook.part.49+0x95/0xb0
[   49.282305]  packet_create+0x81a/0xb00
[   49.286159]  ? register_prot_hook.part.49+0xb0/0xb0
[   49.291143]  ? __sock_create+0x46e/0x850
[   49.295172]  ? lock_downgrade+0x990/0x990
[   49.299285]  ? lock_release+0xa40/0xa40
[   49.303228]  ? __lock_is_held+0xb6/0x140
[   49.307264]  __sock_create+0x4d4/0x850
[   49.311119]  ? ___sys_recvmsg+0x620/0x620
[   49.315244]  SyS_socket+0xeb/0x200
[   49.318760]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   49.323570]  ? move_addr_to_kernel+0x60/0x60
[   49.327949]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   49.332942]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   49.337666]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   49.342385] RIP: 0033:0x451e59
[   49.345542] RSP: 002b:00007f7c22bc0c08 EFLAGS: 00000216 ORIG_RAX: 0000000000000029
[   49.353215] RAX: ffffffffffffffda RBX: 0000000000718000 RCX: 0000000000451e59
[   49.360450] RDX: 0000000000000008 RSI: 0000000000080003 RDI: 0000000000000011
[   49.367687] RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000
[   49.374922] R10: 0000000000000000 R11: 0000000000000216 R12: 00000000004bb419
[   49.382158] R13: 00000000ffffffff R14: ffffffffffffffff R15: 0000000000000001
[   49.389892] Dumping ftrace buffer:
[   49.393398]    (ftrace buffer empty)
[   49.397073] Kernel Offset: disabled
[   49.400673] Rebooting in 86400 seconds..