[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.
[   17.936622] sshd (4420) used greatest stack depth: 16776 bytes left

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added '10.128.10.17' (ECDSA) to the list of known hosts.
net.ipv6.conf.syz_tun.accept_dad = 0
net.ipv6.conf.syz_tun.router_solicitations = 0
syzkaller login: [   39.919090] IPVS: ftp: loaded support on port[0] = 21
RTNETLINK answers: Operation not supported
RTNETLINK answers: No buffer space available
RTNETLINK answers: Operation not supported
[   40.168495] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready
RTNETLINK answers: Operation not supported
RTNETLINK answers: Operation not supported
RTNETLINK answers: Operation not supported
RTNETLINK answers: Invalid argument
RTNETLINK answers: Invalid argument
RTNETLINK answers: Invalid argument
[   40.535358] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready
[   40.541463] 8021q: adding VLAN 0 to HW filter on device bond0
[   40.579910] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[   40.619073] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[   40.659006] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready
[   40.665144] 8021q: adding VLAN 0 to HW filter on device team0
[   40.691934] bond0: Enslaving bond_slave as an active interface with an up link
[   40.700321] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
executing program
[   40.717261] team0: Port device team_slave added
[   40.723064] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
[   40.764190] ==================================================================
[   40.771638] BUG: KASAN: use-after-free in skb_release_data+0x19b/0x860
[   40.778380] Write of size 4 at addr ffff8801d403f0e0 by task syzkaller568741/4450
[   40.785974] 
[   40.787590] CPU: 0 PID: 4450 Comm: syzkaller568741 Not tainted 4.16.0+ #17
[   40.794587] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   40.803918] Call Trace:
[   40.806489]  dump_stack+0x1b9/0x294
[   40.810099]  ? dump_stack_print_info.cold.2+0x52/0x52
[   40.815270]  ? printk+0x9e/0xba
[   40.818540]  ? kmsg_dump_rewind_nolock+0xe4/0xe4
[   40.823276]  ? kasan_check_write+0x14/0x20
[   40.827492]  print_address_description+0x6c/0x20b
[   40.832316]  ? skb_release_data+0x19b/0x860
[   40.836617]  kasan_report.cold.7+0xac/0x2f5
[   40.840926]  check_memory_region+0x13e/0x1b0
[   40.845584]  kasan_check_write+0x14/0x20
[   40.849626]  skb_release_data+0x19b/0x860
[   40.853756]  ? skb_tx_error+0x2f0/0x2f0
[   40.857710]  ? kasan_check_read+0x11/0x20
[   40.861838]  ? rcu_is_watching+0x85/0x140
[   40.865966]  ? kasan_check_write+0x14/0x20
[   40.870192]  ? sock_rmem_free+0x6f/0x90
[   40.874149]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   40.879667]  skb_release_all+0x4a/0x60
[   40.883534]  kfree_skb+0x195/0x560
[   40.887051]  ? skb_queue_purge+0x19/0x40
[   40.891089]  ? __kfree_skb+0x20/0x20
[   40.894784]  ? do_raw_spin_trylock+0x1b0/0x1b0
[   40.900223]  ? _raw_spin_unlock_irqrestore+0x74/0xc0
[   40.905307]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   40.910309]  ? trace_hardirqs_on+0xd/0x10
[   40.914441]  ? skb_dequeue+0x12f/0x180
[   40.918309]  skb_queue_purge+0x19/0x40
[   40.922187]  packet_sock_destruct+0x93/0x290
[   40.926573]  ? packet_mm_close+0xc0/0xc0
[   40.930619]  ? graph_lock+0x170/0x170
[   40.934401]  ? __free_object+0x16e/0x330
[   40.938441]  ? __list_del_entry_valid.cold.1+0x58/0x58
[   40.943784]  ? do_raw_spin_trylock+0x1b0/0x1b0
[   40.948346]  ? packet_mm_close+0xc0/0xc0
[   40.952389]  __sk_destruct+0xff/0xa40
[   40.956178]  ? sock_warn_obsolete_bsdism+0xb0/0xb0
[   40.961873]  ? graph_lock+0x170/0x170
[   40.965658]  ? lock_downgrade+0x8e0/0x8e0
[   40.969787]  ? __lock_is_held+0xb5/0x140
[   40.973832]  ? kasan_check_read+0x11/0x20
[   40.977961]  ? do_raw_spin_unlock+0x9e/0x2e0
[   40.982526]  ? do_raw_spin_trylock+0x1b0/0x1b0
[   40.987100]  ? _raw_spin_unlock_irqrestore+0x74/0xc0
[   40.992200]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   40.997716]  ? refcount_sub_and_test+0x212/0x330
[   41.002453]  ? refcount_inc_not_zero+0x2d0/0x2d0
[   41.007192]  ? refcount_inc_not_zero+0x2d0/0x2d0
[   41.011926]  ? pcpu_free_area+0xa90/0xa90
[   41.016057]  sk_destruct+0x78/0x90
[   41.019577]  __sk_free+0x22e/0x340
[   41.023111]  sk_free+0x42/0x50
[   41.026288]  packet_release+0xa18/0xd50
[   41.030241]  ? lock_downgrade+0x8e0/0x8e0
[   41.034373]  ? packet_lookup_frame+0x270/0x270
[   41.038935]  ? cpumask_weight.constprop.5+0x44/0x44
[   41.043932]  ? do_raw_spin_lock+0xc1/0x200
[   41.048147]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   41.053662]  ? locks_remove_file+0x3f7/0x5a0
[   41.058056]  ? fcntl_setlk+0x1020/0x1020
[   41.062102]  ? fsnotify+0x415/0x1100
[   41.065825]  ? fsnotify_first_mark+0x330/0x330
[   41.070399]  sock_release+0x96/0x1b0
[   41.074095]  ? sock_alloc_file+0x4e0/0x4e0
[   41.078313]  sock_close+0x16/0x20
[   41.081747]  __fput+0x34d/0x890
[   41.085009]  ? fput+0x1a0/0x1a0
[   41.088270]  ? check_same_owner+0x320/0x320
[   41.092579]  ____fput+0x15/0x20
[   41.095837]  task_work_run+0x1e4/0x290
[   41.099705]  ? task_work_cancel+0x240/0x240
[   41.104009]  ? switch_task_namespaces+0xbd/0xd0
[   41.108660]  do_exit+0x1aee/0x2730
[   41.112191]  ? lock_release+0xa10/0xa10
[   41.116155]  ? mm_update_next_owner+0x980/0x980
[   41.120807]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   41.126339]  ? import_iovec+0x24b/0x420
[   41.130308]  ? dup_iter+0x270/0x270
[   41.134104]  ? kasan_check_read+0x11/0x20
[   41.138238]  ? rcu_is_watching+0x85/0x140
[   41.142366]  ? rcu_pm_notify+0xc0/0xc0
[   41.146255]  ? ___sys_sendmsg+0x31a/0x940
[   41.150386]  ? kfree+0x1e9/0x260
[   41.154027]  ? ___sys_sendmsg+0x31f/0x940
[   41.158175]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   41.163696]  ? copy_msghdr_from_user+0x560/0x560
[   41.168439]  ? vm_insert_mixed_mkwrite+0x40/0x40
[   41.173183]  ? graph_lock+0x170/0x170
[   41.176971]  ? graph_lock+0x170/0x170
[   41.180753]  ? find_held_lock+0x36/0x1c0
[   41.184796]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   41.190322]  ? __fget_light+0x2ef/0x430
[   41.194304]  ? fget_raw+0x20/0x20
[   41.197740]  ? find_held_lock+0x36/0x1c0
[   41.201811]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   41.207334]  ? sockfd_lookup_light+0xc5/0x160
[   41.211826]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   41.217350]  ? __sys_sendmsg+0x1aa/0x270
[   41.221391]  ? SyS_shutdown+0x30/0x30
[   41.225179]  ? __do_page_fault+0x441/0xe40
[   41.229397]  do_group_exit+0x16f/0x430
[   41.233267]  ? SyS_exit+0x30/0x30
[   41.236713]  ? syscall_slow_exit_work+0x4f0/0x4f0
[   41.241536]  ? do_syscall_64+0xb7/0x9d0
[   41.245492]  ? do_group_exit+0x430/0x430
[   41.249536]  SyS_exit_group+0x1d/0x20
[   41.253319]  do_syscall_64+0x29e/0x9d0
[   41.257188]  ? vmalloc_sync_all+0x30/0x30
[   41.261316]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   41.266055]  ? syscall_return_slowpath+0x5c0/0x5c0
[   41.270966]  ? syscall_return_slowpath+0x30f/0x5c0
[   41.276139]  ? entry_SYSCALL_64_after_hwframe+0x52/0xb7
[   41.281485]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   41.286309]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   41.291474] RIP: 0033:0x4418d9
[   41.294650] RSP: 002b:00007ffe5f511768 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
[   41.302340] RAX: ffffffffffffffda RBX: 000000000000001b RCX: 00000000004418d9
[   41.309594] RDX: 00000000004418d9 RSI: 0000000000000000 RDI: 0000000000000001
[   41.316856] RBP: 00000000004a34e9 R08: 0000000000006eb0 R09: 00000000006cd018
[   41.324108] R10: 0000000000006eb0 R11: 0000000000000202 R12: 00007ffe5f511868
[   41.331364] R13: 0000000000402660 R14: 0000000000000000 R15: 0000000000000000
[   41.338620] 
[   41.340245] Allocated by task 4450:
[   41.343856]  save_stack+0x43/0xd0
[   41.347292]  kasan_kmalloc+0xc4/0xe0
[   41.350982]  __kmalloc_node_track_caller+0x47/0x70
[   41.355893]  __kmalloc_reserve.isra.38+0x3a/0xe0
[   41.360635]  __alloc_skb+0x14d/0x780
[   41.364326]  alloc_skb_with_frags+0x137/0x760
[   41.368805]  sock_alloc_send_pskb+0x87a/0xae0
[   41.373277]  packet_sendmsg+0x1bd1/0x6100
[   41.377404]  sock_sendmsg+0xd5/0x120
[   41.381094]  ___sys_sendmsg+0x805/0x940
[   41.385052]  __sys_sendmsg+0x115/0x270
[   41.388917]  SyS_sendmsg+0x29/0x30
[   41.392441]  do_syscall_64+0x29e/0x9d0
[   41.396310]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   41.401473] 
[   41.403085] Freed by task 4450:
[   41.406351]  save_stack+0x43/0xd0
[   41.409784]  __kasan_slab_free+0x11a/0x170
[   41.413997]  kasan_slab_free+0xe/0x10
[   41.417775]  kfree+0xd9/0x260
[   41.420868]  skb_free_head+0x99/0xc0
[   41.424558]  skb_release_data+0x690/0x860
[   41.428683]  skb_release_all+0x4a/0x60
[   41.432548]  kfree_skb+0x195/0x560
[   41.436069]  ip6_tnl_start_xmit+0xa44/0x2290
[   41.440469]  dev_hard_start_xmit+0x264/0xc10
[   41.444856]  __dev_queue_xmit+0x2724/0x34c0
[   41.449153]  dev_queue_xmit+0x17/0x20
[   41.452938]  packet_sendmsg+0x411d/0x6100
[   41.457075]  sock_sendmsg+0xd5/0x120
[   41.460772]  ___sys_sendmsg+0x805/0x940
[   41.464722]  __sys_sendmsg+0x115/0x270
[   41.468586]  SyS_sendmsg+0x29/0x30
[   41.472118]  do_syscall_64+0x29e/0x9d0
[   41.475993]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   41.481158] 
[   41.482769] The buggy address belongs to the object at ffff8801d403f000
[   41.482769]  which belongs to the cache kmalloc-512 of size 512
[   41.495412] The buggy address is located 224 bytes inside of
[   41.495412]  512-byte region [ffff8801d403f000, ffff8801d403f200)
[   41.507271] The buggy address belongs to the page:
[   41.512181] page:ffffea0007500fc0 count:1 mapcount:0 mapping:ffff8801d403f000 index:0x0
[   41.520311] flags: 0x2fffc0000000100(slab)
[   41.524530] raw: 02fffc0000000100 ffff8801d403f000 0000000000000000 0000000100000006
[   41.532393] raw: ffffea0007500fa0 ffffea0007501220 ffff8801dac00940 0000000000000000
[   41.540248] page dumped because: kasan: bad access detected
[   41.545930] 
[   41.547530] Memory state around the buggy address:
[   41.552439]  ffff8801d403ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   41.559776]  ffff8801d403f000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   41.567114] >ffff8801d403f080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   41.574450]                                                        ^
[   41.580918]  ffff8801d403f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   41.588254]  ffff8801d403f180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   41.595590] ==================================================================
[   41.602923] Disabling lock debugging due to kernel taint
[   41.608863] Kernel panic - not syncing: panic_on_warn set ...
[   41.608863] 
[   41.616218] CPU: 0 PID: 4450 Comm: syzkaller568741 Tainted: G    B            4.16.0+ #17
[   41.624513] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   41.633844] Call Trace:
[   41.636420]  dump_stack+0x1b9/0x294
[   41.640033]  ? dump_stack_print_info.cold.2+0x52/0x52
[   41.645207]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   41.649947]  ? skb_release_data+0xd0/0x860
[   41.654507]  panic+0x22f/0x4de
[   41.657677]  ? add_taint.cold.5+0x16/0x16
[   41.661806]  ? do_raw_spin_unlock+0x9e/0x2e0
[   41.666200]  ? do_raw_spin_unlock+0x9e/0x2e0
[   41.670591]  ? skb_release_data+0x19b/0x860
[   41.674891]  kasan_end_report+0x47/0x4f
[   41.678851]  kasan_report.cold.7+0xc9/0x2f5
[   41.683150]  check_memory_region+0x13e/0x1b0
[   41.687623]  kasan_check_write+0x14/0x20
[   41.691667]  skb_release_data+0x19b/0x860
[   41.695791]  ? skb_tx_error+0x2f0/0x2f0
[   41.699742]  ? kasan_check_read+0x11/0x20
[   41.703870]  ? rcu_is_watching+0x85/0x140
[   41.707996]  ? kasan_check_write+0x14/0x20
[   41.712207]  ? sock_rmem_free+0x6f/0x90
[   41.716162]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   41.721676]  skb_release_all+0x4a/0x60
[   41.725540]  kfree_skb+0x195/0x560
[   41.729057]  ? skb_queue_purge+0x19/0x40
[   41.733094]  ? __kfree_skb+0x20/0x20
[   41.736793]  ? do_raw_spin_trylock+0x1b0/0x1b0
[   41.741362]  ? _raw_spin_unlock_irqrestore+0x74/0xc0
[   41.746441]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   41.751434]  ? trace_hardirqs_on+0xd/0x10
[   41.755560]  ? skb_dequeue+0x12f/0x180
[   41.759427]  skb_queue_purge+0x19/0x40
[   41.763295]  packet_sock_destruct+0x93/0x290
[   41.767679]  ? packet_mm_close+0xc0/0xc0
[   41.771729]  ? graph_lock+0x170/0x170
[   41.775518]  ? __free_object+0x16e/0x330
[   41.779569]  ? __list_del_entry_valid.cold.1+0x58/0x58
[   41.784823]  ? do_raw_spin_trylock+0x1b0/0x1b0
[   41.789382]  ? packet_mm_close+0xc0/0xc0
[   41.793418]  __sk_destruct+0xff/0xa40
[   41.797195]  ? sock_warn_obsolete_bsdism+0xb0/0xb0
[   41.802100]  ? graph_lock+0x170/0x170
[   41.805879]  ? lock_downgrade+0x8e0/0x8e0
[   41.810002]  ? __lock_is_held+0xb5/0x140
[   41.814039]  ? kasan_check_read+0x11/0x20
[   41.818165]  ? do_raw_spin_unlock+0x9e/0x2e0
[   41.822550]  ? do_raw_spin_trylock+0x1b0/0x1b0
[   41.827750]  ? _raw_spin_unlock_irqrestore+0x74/0xc0
[   41.832831]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   41.838344]  ? refcount_sub_and_test+0x212/0x330
[   41.843080]  ? refcount_inc_not_zero+0x2d0/0x2d0
[   41.847820]  ? refcount_inc_not_zero+0x2d0/0x2d0
[   41.852561]  ? pcpu_free_area+0xa90/0xa90
[   41.856690]  sk_destruct+0x78/0x90
[   41.860208]  __sk_free+0x22e/0x340
[   41.863725]  sk_free+0x42/0x50
[   41.866895]  packet_release+0xa18/0xd50
[   41.870852]  ? lock_downgrade+0x8e0/0x8e0
[   41.874987]  ? packet_lookup_frame+0x270/0x270
[   41.879549]  ? cpumask_weight.constprop.5+0x44/0x44
[   41.884547]  ? do_raw_spin_lock+0xc1/0x200
[   41.888766]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   41.894279]  ? locks_remove_file+0x3f7/0x5a0
[   41.898663]  ? fcntl_setlk+0x1020/0x1020
[   41.902698]  ? fsnotify+0x415/0x1100
[   41.906391]  ? fsnotify_first_mark+0x330/0x330
[   41.910949]  sock_release+0x96/0x1b0
[   41.914641]  ? sock_alloc_file+0x4e0/0x4e0
[   41.918850]  sock_close+0x16/0x20
[   41.922287]  __fput+0x34d/0x890
[   41.925557]  ? fput+0x1a0/0x1a0
[   41.928815]  ? check_same_owner+0x320/0x320
[   41.933115]  ____fput+0x15/0x20
[   41.936369]  task_work_run+0x1e4/0x290
[   41.940240]  ? task_work_cancel+0x240/0x240
[   41.944570]  ? switch_task_namespaces+0xbd/0xd0
[   41.949238]  do_exit+0x1aee/0x2730
[   41.952762]  ? lock_release+0xa10/0xa10
[   41.956718]  ? mm_update_next_owner+0x980/0x980
[   41.961892]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   41.967416]  ? import_iovec+0x24b/0x420
[   41.971367]  ? dup_iter+0x270/0x270
[   41.974972]  ? kasan_check_read+0x11/0x20
[   41.979102]  ? rcu_is_watching+0x85/0x140
[   41.983231]  ? rcu_pm_notify+0xc0/0xc0
[   41.987099]  ? ___sys_sendmsg+0x31a/0x940
[   41.991224]  ? kfree+0x1e9/0x260
[   41.994575]  ? ___sys_sendmsg+0x31f/0x940
[   41.998703]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   42.004220]  ? copy_msghdr_from_user+0x560/0x560
[   42.008954]  ? vm_insert_mixed_mkwrite+0x40/0x40
[   42.013685]  ? graph_lock+0x170/0x170
[   42.017463]  ? graph_lock+0x170/0x170
[   42.021241]  ? find_held_lock+0x36/0x1c0
[   42.025282]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   42.030795]  ? __fget_light+0x2ef/0x430
[   42.034745]  ? fget_raw+0x20/0x20
[   42.038174]  ? find_held_lock+0x36/0x1c0
[   42.042221]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   42.047736]  ? sockfd_lookup_light+0xc5/0x160
[   42.052211]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   42.057724]  ? __sys_sendmsg+0x1aa/0x270
[   42.061775]  ? SyS_shutdown+0x30/0x30
[   42.065554]  ? __do_page_fault+0x441/0xe40
[   42.069767]  do_group_exit+0x16f/0x430
[   42.073632]  ? SyS_exit+0x30/0x30
[   42.077062]  ? syscall_slow_exit_work+0x4f0/0x4f0
[   42.081888]  ? do_syscall_64+0xb7/0x9d0
[   42.085839]  ? do_group_exit+0x430/0x430
[   42.089881]  SyS_exit_group+0x1d/0x20
[   42.093661]  do_syscall_64+0x29e/0x9d0
[   42.097524]  ? vmalloc_sync_all+0x30/0x30
[   42.101656]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   42.106391]  ? syscall_return_slowpath+0x5c0/0x5c0
[   42.111298]  ? syscall_return_slowpath+0x30f/0x5c0
[   42.116206]  ? entry_SYSCALL_64_after_hwframe+0x52/0xb7
[   42.121548]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   42.126369]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   42.131707] RIP: 0033:0x4418d9
[   42.134873] RSP: 002b:00007ffe5f511768 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
[   42.142558] RAX: ffffffffffffffda RBX: 000000000000001b RCX: 00000000004418d9
[   42.149805] RDX: 00000000004418d9 RSI: 0000000000000000 RDI: 0000000000000001
[   42.157053] RBP: 00000000004a34e9 R08: 0000000000006eb0 R09: 00000000006cd018
[   42.164301] R10: 0000000000006eb0 R11: 0000000000000202 R12: 00007ffe5f511868
[   42.171552] R13: 0000000000402660 R14: 0000000000000000 R15: 0000000000000000
[   42.179226] Dumping ftrace buffer:
[   42.182743]    (ftrace buffer empty)
[   42.186427] Kernel Offset: disabled
[   42.190033] Rebooting in 86400 seconds..