[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 syzkaller login: [ 33.642292] IPVS: ftp: loaded support on port[0] = 21 [ 33.845541] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready Warning: Permanently added '10.128.0.81' (ECDSA) to the list of known hosts. 2019/11/30 14:49:18 parsed 1 programs 2019/11/30 14:49:18 executed programs: 0 [ 41.009015] IPVS: ftp: loaded support on port[0] = 21 [ 41.041192] IPVS: ftp: loaded support on port[0] = 21 [ 41.078894] IPVS: ftp: loaded support on port[0] = 21 [ 41.121947] IPVS: ftp: loaded support on port[0] = 21 [ 41.204825] IPVS: ftp: loaded support on port[0] = 21 [ 41.307834] IPVS: ftp: loaded support on port[0] = 21 [ 41.753709] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 41.819580] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 42.023801] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 42.048673] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 42.151784] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 42.242585] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 43.159170] skbuff: skb_over_panic: text:ffffffff84a2c1b8 len:1584 put:1584 head:ffff8801d4c04d40 data:ffff8801d4c04dd8 tail:0x6c8 end:0x6c0 dev: [ 43.177376] ------------[ cut here ]------------ [ 43.193893] kernel BUG at net/core/skbuff.c:105! [ 43.208354] invalid opcode: 0000 [#1] SMP KASAN [ 43.213094] Modules linked in: [ 43.216283] CPU: 1 PID: 4434 Comm: syz-executor2 Not tainted 4.13.0-rc6-syzkaller #0 [ 43.224154] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.233666] task: ffff8801d0f704c0 task.stack: ffff8801cc410000 [ 43.239738] RIP: 0010:skb_panic+0x169/0x16b [ 43.244051] RSP: 0018:ffff8801cc417140 EFLAGS: 00010286 [ 43.249408] RAX: 000000000000008b RBX: ffffffff85e5b4e0 RCX: 0000000000000000 [ 43.256672] RDX: 000000000000008b RSI: ffff8801db116d78 RDI: ffffed0039882e1f [ 43.263937] RBP: ffff8801cc4171a8 R08: ffff8801d0f70d48 R09: 0000000000000006 [ 43.271204] R10: ffff8801d0f704c0 R11: dffffc0000000000 R12: ffff8801cfc863c0 [ 43.278478] R13: ffff8801d4c04dd8 R14: 00000000000006c8 R15: 00000000000006c0 [ 43.285748] FS: 00007f45d2974700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 [ 43.293988] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.299867] CR2: 000000000063f210 CR3: 00000001cdd2f000 CR4: 00000000001406e0 [ 43.307311] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.314618] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.318674] skbuff: skb_over_panic: text:ffffffff84a2c1b8 len:1584 put:1584 head:ffff8801cbedab00 data:ffff8801cbedab98 tail:0x6c8 end:0x6c0 dev: [ 43.318737] ------------[ cut here ]------------ [ 43.318738] kernel BUG at net/core/skbuff.c:105! [ 43.345094] Call Trace: [ 43.347678] ? __ip6_append_data.isra.44+0x1e88/0x3e50 [ 43.352946] ? __ip6_append_data.isra.44+0x1e88/0x3e50 [ 43.358201] skb_put.cold.86+0x21/0x21 [ 43.362078] __ip6_append_data.isra.44+0x1e88/0x3e50 [ 43.367262] ? entry_SYSCALL_64_fastpath+0x23/0xc2 [ 43.372167] ? SyS_sendmsg+0xd/0x20 [ 43.375768] ? entry_SYSCALL_64_fastpath+0x23/0xc2 [ 43.380688] ? find_held_lock+0x36/0x1c0 [ 43.384727] ? ip6_cork_release.isra.43+0x2a0/0x2a0 [ 43.389721] ? lock_release+0x9d0/0x9d0 [ 43.393671] ? __lock_is_held+0xb5/0x140 [ 43.397715] ? ip6_mtu+0x2ef/0x440 [ 43.401228] ? ip6_rt_cache_alloc+0x5e0/0x5e0 [ 43.405695] ? find_held_lock+0x36/0x1c0 [ 43.409738] ? memcpy+0x45/0x50 [ 43.412992] ? ip6_setup_cork+0xe5b/0x1a90 [ 43.417213] ? rawv6_sendmsg+0x1cae/0x46d0 [ 43.421420] ? __ip6_append_data.isra.44+0x3e50/0x3e50 [ 43.426679] ip6_append_data+0x157/0x2b0 [ 43.430727] ? rawv6_mh_filter_unregister+0xc0/0xc0 [ 43.435730] ? lock_sock_nested+0x87/0x100 [ 43.440063] ? rawv6_mh_filter_unregister+0xc0/0xc0 [ 43.445078] rawv6_sendmsg+0x1d2c/0x46d0 [ 43.449122] ? rawv6_bind+0x700/0x700 [ 43.452899] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 43.457982] ? trace_hardirqs_on_caller+0x40c/0x580 [ 43.462987] ? debug_check_no_locks_freed+0x310/0x310 [ 43.468150] ? save_stack+0xa9/0xd0 [ 43.471755] ? save_stack_trace+0x16/0x20 [ 43.476400] ? save_stack+0x43/0xd0 [ 43.479997] ? kasan_kmalloc+0xc4/0xe0 [ 43.483868] ? __kmalloc+0x147/0x760 [ 43.487563] ? sock_kmalloc+0xfa/0x190 [ 43.491423] ? ___sys_sendmsg+0x3d6/0x9d0 [ 43.495561] ? __sys_sendmsg+0xd6/0x220 [ 43.499508] ? SyS_sendmsg+0xd/0x20 [ 43.503131] ? entry_SYSCALL_64_fastpath+0x23/0xc2 [ 43.508226] ? trace_hardirqs_off+0x10/0x10 [ 43.512546] ? lock_downgrade+0x830/0x830 [ 43.516683] ? lock_release+0x9d0/0x9d0 [ 43.520658] ? find_held_lock+0x36/0x1c0 [ 43.524796] inet_sendmsg+0x148/0x5a0 [ 43.528585] ? inet_sendmsg+0x148/0x5a0 [ 43.532546] ? inet_recvmsg+0x790/0x790 [ 43.536505] ? __might_sleep+0x93/0xb0 [ 43.540379] ? inet_recvmsg+0x790/0x790 [ 43.544329] sock_sendmsg+0xb5/0xf0 [ 43.547955] ___sys_sendmsg+0x690/0x9d0 [ 43.551967] ? copy_msghdr_from_user+0x5c0/0x5c0 [ 43.556847] ? __local_bh_enable_ip+0x9d/0x160 [ 43.562064] ? trace_hardirqs_on_caller+0x40c/0x580 [ 43.568487] ? release_sock+0x1ab/0x270 [ 43.572464] ? trace_hardirqs_on+0xd/0x10 [ 43.576595] ? __fget_light+0x2a5/0x3f0 [ 43.580552] ? fget_raw+0x10/0x10 [ 43.583994] ? __release_sock+0x330/0x330 [ 43.588134] ? __schedule+0x1f70/0x1f70 [ 43.592086] ? __local_bh_enable_ip+0x9d/0x160 [ 43.596648] ? ip6_datagram_connect+0x32/0x40 [ 43.601133] ? __fdget+0xe/0x10 [ 43.604391] ? trace_hardirqs_off+0xd/0x10 [ 43.608615] __sys_sendmsg+0xd6/0x220 [ 43.612392] ? SyS_shutdown+0x2b0/0x2b0 [ 43.616348] ? syscall_return_slowpath+0x2cc/0x360 [ 43.621254] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 43.625984] SyS_sendmsg+0xd/0x20 [ 43.629410] entry_SYSCALL_64_fastpath+0x23/0xc2 [ 43.634142] RIP: 0033:0x453929 [ 43.637327] RSP: 002b:00007f45d2973c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e [ 43.645019] RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453929 [ 43.652277] RDX: 0000000000008000 RSI: 0000000020000000 RDI: 0000000000000003 [ 43.659526] RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000 [ 43.667293] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006ef910 [ 43.674542] R13: 00000000ffffffff R14: 00007f45d29746d4 R15: 0000000000000000 [ 43.681809] Code: 4c 8b 4d b8 44 8b 45 d4 48 8b 55 c8 53 48 c7 c7 20 b5 e5 85 41 8b 8c 24 80 00 00 00 48 8b 75 c0 41 57 41 56 41 55 e8 57 f1 3f fd <0f> 0b 4c 8b 65 08 89 75 e8 e8 5a 52 89 fd 8b 75 e8 48 c7 c1 60 [ 43.700874] RIP: skb_panic+0x169/0x16b RSP: ffff8801cc417140 [ 43.706709] invalid opcode: 0000 [#2] SMP KASAN [ 43.707149] ---[ end trace d08d49753cc3316a ]--- [ 43.707152] Kernel panic - not syncing: Fatal exception [ 43.721444] Modules linked in: [ 43.724619] CPU: 0 PID: 4480 Comm: syz-executor4 Tainted: G D 4.13.0-rc6-syzkaller #0 [ 43.733710] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.743045] task: ffff8801cbe0c700 task.stack: ffff8801cc1b8000 [ 43.749089] RIP: 0010:skb_panic+0x169/0x16b [ 43.753387] RSP: 0018:ffff8801cc1bf140 EFLAGS: 00010286 [ 43.758909] RAX: 000000000000008b RBX: ffffffff85e5b4e0 RCX: 0000000000000000 [ 43.766166] RDX: 000000000000008b RSI: 0000000000000001 RDI: ffffed0039837e1f [ 43.773414] RBP: ffff8801cc1bf1a8 R08: 1ffff10039837dd3 R09: 0000000000000000 [ 43.780663] R10: fffffbfff0fb6222 R11: ffff8801cbe0c700 R12: ffff8801cc817b40 [ 43.788025] R13: ffff8801cbedab98 R14: 00000000000006c8 R15: 00000000000006c0 [ 43.795300] FS: 00007f1d8794a700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 [ 43.803516] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.809388] CR2: 00007ffd4773dbec CR3: 00000001cc70f000 CR4: 00000000001406f0 [ 43.816640] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.823890] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.831235] Call Trace: [ 43.833911] ? __ip6_append_data.isra.44+0x1e88/0x3e50 [ 43.839165] ? __ip6_append_data.isra.44+0x1e88/0x3e50 [ 43.844431] skb_put.cold.86+0x21/0x21 [ 43.848303] __ip6_append_data.isra.44+0x1e88/0x3e50 [ 43.853399] ? entry_SYSCALL_64_fastpath+0x23/0xc2 [ 43.858308] ? SyS_sendmsg+0xd/0x20 [ 43.861920] ? cache_grow_end.part.40+0x95/0x170 [ 43.866673] ? ip6_cork_release.isra.43+0x2a0/0x2a0 [ 43.871672] ? lock_release+0x9d0/0x9d0 [ 43.875628] ? kasan_unpoison_shadow+0x35/0x50 [ 43.880215] ? kasan_kmalloc+0xc4/0xe0 [ 43.884085] ? ip6_mtu+0x2ef/0x440 [ 43.887602] ? ip6_rt_cache_alloc+0x5e0/0x5e0 [ 43.892077] ? memcpy+0x45/0x50 [ 43.895336] ? ip6_setup_cork+0xe5b/0x1a90 [ 43.899554] ? rawv6_sendmsg+0x1cae/0x46d0 [ 43.903781] ? __ip6_append_data.isra.44+0x3e50/0x3e50 [ 43.909037] ip6_append_data+0x157/0x2b0 [ 43.913077] ? rawv6_mh_filter_unregister+0xc0/0xc0 [ 43.918071] ? lock_sock_nested+0x87/0x100 [ 43.922281] ? rawv6_mh_filter_unregister+0xc0/0xc0 [ 43.927276] rawv6_sendmsg+0x1d2c/0x46d0 [ 43.931324] ? __free_insn_slot+0x670/0x670 [ 43.935633] ? rawv6_bind+0x700/0x700 [ 43.940195] ? is_bpf_text_address+0x81/0xe0 [ 43.944601] ? __kernel_text_address+0x9a/0xf0 [ 43.949172] ? unwind_get_return_address+0x61/0xa0 [ 43.954080] ? __save_stack_trace+0x7e/0xd0 [ 43.958393] ? depot_save_stack+0x12a/0x422 [ 43.962698] ? debug_check_no_locks_freed+0x310/0x310 [ 43.967868] ? save_stack+0xa9/0xd0 [ 43.971475] ? save_stack_trace+0x16/0x20 [ 43.975619] ? save_stack+0x43/0xd0 [ 43.979224] ? kasan_kmalloc+0xc4/0xe0 [ 43.983087] ? __kmalloc+0x147/0x760 [ 43.986775] ? sock_kmalloc+0xfa/0x190 [ 43.990639] ? ___sys_sendmsg+0x3d6/0x9d0 [ 43.994763] ? __sys_sendmsg+0xd6/0x220 [ 43.998712] ? SyS_sendmsg+0xd/0x20 [ 44.002342] ? entry_SYSCALL_64_fastpath+0x23/0xc2 [ 44.007257] ? __alloc_pages_slowpath+0x2c70/0x2c70 [ 44.012254] ? lock_acquire+0x1dc/0x520 [ 44.016209] ? cache_grow_end.part.40+0x95/0x170 [ 44.020955] ? lock_downgrade+0x830/0x830 [ 44.025095] ? futex_wake+0x237/0x890 [ 44.028888] ? lock_release+0x9d0/0x9d0 [ 44.032854] ? __might_fault+0xf1/0x1b0 [ 44.036924] ? trace_event_raw_event_sched_switch+0x680/0x680 [ 44.042913] inet_sendmsg+0x148/0x5a0 [ 44.046701] ? inet_sendmsg+0x148/0x5a0 [ 44.050656] ? inet_recvmsg+0x790/0x790 [ 44.054625] ? __might_sleep+0x93/0xb0 [ 44.058512] ? inet_recvmsg+0x790/0x790 [ 44.062479] sock_sendmsg+0xb5/0xf0 [ 44.066086] ___sys_sendmsg+0x690/0x9d0 [ 44.070041] ? copy_msghdr_from_user+0x5c0/0x5c0 [ 44.074792] ? do_raw_spin_unlock+0x1ec/0x2d0 [ 44.079268] ? do_raw_spin_trylock+0x190/0x190 [ 44.083856] ? release_sock+0x1ab/0x270 [ 44.087870] ? trace_hardirqs_on+0xd/0x10 [ 44.092007] ? __fget_light+0x2a5/0x3f0 [ 44.095959] ? release_sock+0x1ab/0x270 [ 44.099913] ? fget_raw+0x10/0x10 [ 44.103338] ? __release_sock+0x330/0x330 [ 44.107460] ? trace_hardirqs_on+0xd/0x10 [ 44.111584] ? __local_bh_enable_ip+0x9d/0x160 [ 44.116150] ? ip6_datagram_connect+0x32/0x40 [ 44.120619] ? ip6_datagram_connect_v6_only+0x40/0x70 [ 44.125789] ? __fdget+0xe/0x10 [ 44.129049] __sys_sendmsg+0xd6/0x220 [ 44.132828] ? SyS_shutdown+0x2b0/0x2b0 [ 44.136783] ? SyS_futex+0xf0/0x3e7 [ 44.140396] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 44.145127] SyS_sendmsg+0xd/0x20 [ 44.148556] entry_SYSCALL_64_fastpath+0x23/0xc2 [ 44.153285] RIP: 0033:0x453929 [ 44.156461] RSP: 002b:00007f1d87949c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e [ 44.164145] RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453929 [ 44.171392] RDX: 0000000000008000 RSI: 0000000020000000 RDI: 0000000000000003 [ 44.178638] RBP: 00000000000005cb R08: 0000000000000000 R09: 0000000000000000 [ 44.185882] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f7ba8 [ 44.193132] R13: 00000000ffffffff R14: 00007f1d8794a6d4 R15: 0000000000000000 [ 44.200390] Code: 4c 8b 4d b8 44 8b 45 d4 48 8b 55 c8 53 48 c7 c7 20 b5 e5 85 41 8b 8c 24 80 00 00 00 48 8b 75 c0 41 57 41 56 41 55 e8 57 f1 3f fd <0f> 0b 4c 8b 65 08 89 75 e8 e8 5a 52 89 fd 8b 75 e8 48 c7 c1 60 [ 44.219661] RIP: skb_panic+0x169/0x16b RSP: ffff8801cc1bf140 [ 44.225481] Kernel Offset: disabled [ 44.229133] Rebooting in 86400 seconds..