[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.713394] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.789511] random: sshd: uninitialized urandom read (32 bytes read) [ 20.263290] random: sshd: uninitialized urandom read (32 bytes read) [ 21.024096] random: sshd: uninitialized urandom read (32 bytes read) [ 32.990077] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.43' (ECDSA) to the list of known hosts. [ 38.384937] random: sshd: uninitialized urandom read (32 bytes read) 2018/05/02 17:51:41 parsed 1 programs 2018/05/02 17:51:41 executed programs: 0 [ 38.832093] IPVS: Creating netns size=2536 id=1 [ 38.867149] IPVS: Creating netns size=2536 id=2 [ 38.905501] IPVS: Creating netns size=2536 id=3 [ 38.938727] IPVS: Creating netns size=2536 id=4 [ 38.976100] IPVS: Creating netns size=2536 id=5 [ 39.016018] IPVS: Creating netns size=2536 id=6 [ 39.059059] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 39.066688] IPVS: Creating netns size=2536 id=7 [ 39.079764] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 39.109695] IPVS: Creating netns size=2536 id=8 [ 39.195491] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 39.218652] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 39.230998] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 39.243554] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 39.282285] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 39.330161] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 39.373166] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 39.381787] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 39.389733] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 39.402925] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 39.416376] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 39.428283] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 39.436761] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 39.446635] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 39.461673] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 39.471218] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 39.498472] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 39.527747] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 39.568133] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 39.587823] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 39.603310] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 39.612345] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 39.622911] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 39.632004] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 39.639602] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 39.647159] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 39.655296] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 39.662881] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 39.670364] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 39.687047] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 39.700349] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 39.708895] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 39.718350] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 39.730678] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 39.784551] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 39.800834] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 39.828155] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 39.839098] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 39.849945] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 39.861556] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 39.869516] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 39.884193] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 39.891460] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 39.904739] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 39.911811] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 39.920890] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 39.938384] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 39.961929] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 39.971312] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 39.981866] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 39.995527] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 40.002956] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 40.023107] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 40.030796] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 40.044816] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 40.070638] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 40.085824] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 40.097010] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 40.107425] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 40.115008] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 40.122479] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 40.130250] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 40.140924] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 40.149609] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 40.157508] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 40.165306] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 40.174824] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 40.183985] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 40.200846] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 40.209924] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 40.219542] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 40.230723] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 40.239956] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 40.252389] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 40.264881] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 40.272308] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 41.287077] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 41.371872] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 41.418680] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 41.433137] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 41.441077] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 41.499086] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 41.512147] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 41.519639] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 41.561981] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 41.606344] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 41.662953] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 41.690630] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 41.703219] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 41.711552] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 41.723673] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 41.736949] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 41.743657] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 41.789062] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 41.800362] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 41.809308] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 41.875901] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 41.883244] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 41.891583] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 41.988933] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 41.996988] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 42.005443] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 42.012158] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 42.018985] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 42.025736] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 42.045974] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 42.052802] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 42.060744] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 42.367870] ------------[ cut here ]------------ [ 42.372768] WARNING: CPU: 0 PID: 5767 at net/core/dev.c:2473 skb_warn_bad_offload+0x2af/0x380 [ 42.381446] veth0: caps=(0x00000c229fbb59e9, 0x0000000000000000) len=64831 data_len=64741 gso_size=49152 gso_type=5 ip_summed=0 [ 42.393071] Kernel panic - not syncing: panic_on_warn set ... [ 42.393071] [ 42.400426] CPU: 0 PID: 5767 Comm: syz-executor5 Not tainted 4.9.97-g1321d42 #16 [ 42.407944] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.417282] ffff8801b44ef490 ffffffff81eb0b69 ffffffff83c484a0 00000000ffffffff [ 42.425422] 0000000000000000 0000000000000000 00000000000009a9 ffff8801b44ef550 [ 42.433476] ffffffff8141f975 0000000041b58ab3 ffffffff843b8408 ffffffff8141f7b6 [ 42.441511] Call Trace: [ 42.444092] [] dump_stack+0xc1/0x128 [ 42.449447] [] panic+0x1bf/0x3bc [ 42.454454] [] ? add_taint.cold.6+0x16/0x16 [ 42.460416] [] ? __warn.cold.9+0xa6/0x17f [ 42.466207] [] ? skb_warn_bad_offload+0x2af/0x380 [ 42.472688] [] __warn.cold.9+0xc1/0x17f [ 42.478303] [] warn_slowpath_fmt+0xc2/0x100 [ 42.484261] [] ? __warn+0x50/0x50 [ 42.489357] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 42.496276] [] ? ___ratelimit+0x53/0x401 [ 42.502010] [] skb_warn_bad_offload+0x2af/0x380 [ 42.508323] [] __skb_gso_segment+0x546/0x680 [ 42.514373] [] validate_xmit_skb+0x48e/0xab0 [ 42.520423] [] ? check_preemption_disabled+0x3b/0x170 [ 42.527255] [] ? check_preemption_disabled+0x3b/0x170 [ 42.534079] [] __dev_queue_xmit+0x888/0x2080 [ 42.540125] [] ? __dev_queue_xmit+0x1e2/0x2080 [ 42.546345] [] ? netdev_pick_tx+0x2c0/0x2c0 [ 42.552306] [] ? __check_object_size+0x248/0x38e [ 42.558704] [] ? copy_page_from_iter+0x3df/0x610 [ 42.565103] [] dev_queue_xmit+0x17/0x20 [ 42.570721] [] packet_sendmsg+0x1eff/0x4470 [ 42.576685] [] ? packet_cached_dev_get+0x1f0/0x1f0 [ 42.583253] [] ? sock_has_perm+0x292/0x3e0 [ 42.589128] [] ? sock_has_perm+0x9f/0x3e0 [ 42.594917] [] ? selinux_file_send_sigiotask+0x310/0x310 [ 42.602009] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 42.608494] [] ? security_socket_sendmsg+0x8f/0xc0 [ 42.615064] [] ? packet_cached_dev_get+0x1f0/0x1f0 [ 42.621636] [] sock_sendmsg+0xcc/0x110 [ 42.627163] [] SYSC_sendto+0x21c/0x370 [ 42.632692] [] ? SYSC_connect+0x300/0x300 [ 42.638479] [] ? sock_has_perm+0x292/0x3e0 [ 42.644356] [] ? selinux_file_send_sigiotask+0x310/0x310 [ 42.651452] [] ? selinux_netlbl_socket_setsockopt+0x8c/0x340 [ 42.658892] [] ? selinux_netlbl_sock_rcv_skb+0x480/0x480 [ 42.665985] [] ? compat_SyS_futex+0x1e1/0x2f0 [ 42.672123] [] ? compat_SyS_get_robust_list+0x310/0x310 [ 42.679129] [] ? compat_SyS_setsockopt+0x18d/0x2a0 [ 42.685703] [] ? packet_setsockopt+0x23d0/0x23d0 [ 42.692101] [] ? scm_detach_fds_compat+0x3b0/0x3b0 [ 42.698670] [] SyS_sendto+0x40/0x50 [ 42.703941] [] ? SyS_getpeername+0x30/0x30 [ 42.709824] [] do_fast_syscall_32+0x2f7/0x870 [ 42.715957] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.722613] [] entry_SYSENTER_compat+0x90/0xa2 [ 42.729432] Dumping ftrace buffer: [ 42.732991] (ftrace buffer empty) [ 42.736675] Kernel Offset: disabled [ 42.740276] Rebooting in 86400 seconds..