[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 12.945078] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c[ 12.982334] random: sshd: uninitialized urandom read (32 bytes read) 7[ ok 8[?25h[?0c. [ 13.301447] random: sshd: uninitialized urandom read (32 bytes read) [ 14.106598] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 14.354090] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.2' (ECDSA) to the list of known hosts. [ 19.802167] random: sshd: uninitialized urandom read (32 bytes read) 2018/04/29 22:32:47 parsed 1 programs 2018/04/29 22:32:47 executed programs: 0 [ 20.241994] IPVS: Creating netns size=2536 id=1 [ 20.275747] IPVS: Creating netns size=2536 id=2 [ 20.312477] IPVS: Creating netns size=2536 id=3 [ 20.350861] IPVS: Creating netns size=2536 id=4 [ 20.390682] IPVS: Creating netns size=2536 id=5 [ 20.442728] IPVS: Creating netns size=2536 id=6 [ 20.498518] IPVS: Creating netns size=2536 id=7 [ 20.558498] IPVS: Creating netns size=2536 id=8 [ 20.614782] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 20.640559] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 20.759240] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 20.797059] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 20.810433] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 20.828236] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 20.845183] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 20.861377] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 20.923759] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 20.954505] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 20.991296] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 21.022639] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 21.052920] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 21.067251] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 21.091623] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 21.104609] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 21.121945] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 21.130624] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 21.146020] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 21.155791] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 21.166671] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 21.190080] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 21.197435] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 21.211218] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 21.234529] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 21.250297] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 21.269149] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 21.289329] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 21.314841] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 21.331598] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 21.343748] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 21.362361] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 21.372659] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 21.382824] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 21.420087] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 21.429315] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 21.440807] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 21.449175] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 21.457274] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 21.473331] ip (4348) used greatest stack depth: 23960 bytes left [ 21.489029] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 21.503019] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 21.511023] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 21.518635] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 21.526640] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 21.535213] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 21.549345] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 21.562038] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 21.573274] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 21.606695] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 21.655923] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 21.665280] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 21.678772] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 21.686859] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 21.701713] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 21.714428] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 21.725791] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 21.734608] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 21.746809] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 21.756822] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 21.765484] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 21.773748] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 21.781375] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 21.789369] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 21.796781] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 21.806876] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 21.814905] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 21.831121] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 21.838894] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 21.850784] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 21.863691] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 21.873393] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 21.893681] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 21.908919] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 21.916419] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 21.979072] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 22.023157] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 22.063730] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 22.073466] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 22.081689] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 22.102556] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 22.115618] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 22.124129] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 23.232817] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 23.316941] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 23.356099] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 23.371712] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 23.379294] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 23.436145] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 23.445684] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 23.452226] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 23.459278] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 23.503242] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 23.544284] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 23.559654] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 23.566386] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 23.586669] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 23.620236] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 23.626391] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 23.633766] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 23.662505] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 23.738901] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 23.746652] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 23.755539] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 23.768067] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 23.777098] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 23.784197] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 23.857350] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 23.946838] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 23.955476] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 23.964274] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 23.981611] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 24.103114] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 24.113366] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 24.121815] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 24.354718] ------------[ cut here ]------------ [ 24.359544] WARNING: CPU: 1 PID: 5787 at net/core/dev.c:2473 skb_warn_bad_offload+0x2af/0x380 [ 24.368224] veth0: caps=(0x00000c229fbb59e9, 0x0000000000000000) len=65235 data_len=65145 gso_size=49152 gso_type=5 ip_summed=0 [ 24.379854] Kernel panic - not syncing: panic_on_warn set ... [ 24.379854] [ 24.387211] CPU: 1 PID: 5787 Comm: syz-executor5 Not tainted 4.9.96-g71fce1e #13 [ 24.394730] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.404076] ffff8801d8a9f488 ffffffff81eb0b69 ffffffff83a484a0 00000000ffffffff [ 24.412122] 0000000000000000 0000000000000001 00000000000009a9 ffff8801d8a9f548 [ 24.420155] ffffffff8141f975 0000000041b58ab3 ffffffff841b8030 ffffffff8141f7b6 [ 24.428853] Call Trace: [ 24.431434] [] dump_stack+0xc1/0x128 [ 24.436791] [] panic+0x1bf/0x3bc [ 24.441811] [] ? add_taint.cold.6+0x16/0x16 [ 24.447776] [] ? __warn.cold.9+0xa6/0x17f [ 24.453572] [] ? skb_warn_bad_offload+0x2af/0x380 [ 24.460064] [] __warn.cold.9+0xc1/0x17f [ 24.465682] [] warn_slowpath_fmt+0xc2/0x100 [ 24.471643] [] ? __warn+0x50/0x50 [ 24.476740] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 24.483659] [] ? ___ratelimit+0x53/0x401 [ 24.489363] [] skb_warn_bad_offload+0x2af/0x380 [ 24.495675] [] __skb_gso_segment+0x546/0x680 [ 24.501728] [] validate_xmit_skb+0x48e/0xab0 [ 24.507775] [] ? check_preemption_disabled+0x3b/0x170 [ 24.514610] [] ? check_preemption_disabled+0x3b/0x170 [ 24.521449] [] __dev_queue_xmit+0x888/0x2080 [ 24.527495] [] ? __dev_queue_xmit+0x1e2/0x2080 [ 24.533734] [] ? netdev_pick_tx+0x2c0/0x2c0 [ 24.539697] [] ? __check_object_size+0x248/0x38e [ 24.546094] [] ? copy_page_from_iter+0x3df/0x610 [ 24.552490] [] dev_queue_xmit+0x17/0x20 [ 24.558106] [] packet_sendmsg+0x1f17/0x44e0 [ 24.564074] [] ? packet_cached_dev_get+0x1f0/0x1f0 [ 24.570644] [] ? sock_has_perm+0x292/0x3e0 [ 24.576519] [] ? sock_has_perm+0x9f/0x3e0 [ 24.582308] [] ? selinux_file_send_sigiotask+0x310/0x310 [ 24.589402] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 24.595888] [] ? security_socket_sendmsg+0x8f/0xc0 [ 24.602460] [] ? packet_cached_dev_get+0x1f0/0x1f0 [ 24.609026] [] sock_sendmsg+0xcc/0x110 [ 24.614557] [] SYSC_sendto+0x21c/0x370 [ 24.620082] [] ? SYSC_connect+0x300/0x300 [ 24.625869] [] ? sock_has_perm+0x292/0x3e0 [ 24.631748] [] ? selinux_file_send_sigiotask+0x310/0x310 [ 24.638840] [] ? selinux_netlbl_socket_setsockopt+0x8c/0x340 [ 24.646283] [] ? selinux_netlbl_sock_rcv_skb+0x480/0x480 [ 24.653379] [] ? compat_SyS_futex+0x1e1/0x2f0 [ 24.659517] [] ? compat_SyS_get_robust_list+0x310/0x310 [ 24.666523] [] ? compat_SyS_setsockopt+0x18d/0x2a0 [ 24.673094] [] ? packet_setsockopt+0x2350/0x2350 [ 24.679522] [] ? scm_detach_fds_compat+0x3b0/0x3b0 [ 24.686092] [] SyS_sendto+0x40/0x50 [ 24.691361] [] ? SyS_getpeername+0x30/0x30 [ 24.697238] [] do_fast_syscall_32+0x2f7/0x870 [ 24.703374] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.710033] [] entry_SYSENTER_compat+0x90/0xa2 [ 24.716810] Dumping ftrace buffer: [ 24.720377] (ftrace buffer empty) [ 24.724069] Kernel Offset: disabled [ 24.727672] Rebooting in 86400 seconds..