[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 21.924917] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.292454] random: sshd: uninitialized urandom read (32 bytes read) [ 25.714874] random: sshd: uninitialized urandom read (32 bytes read) [ 26.231375] random: sshd: uninitialized urandom read (32 bytes read) [ 45.771277] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.42' (ECDSA) to the list of known hosts. [ 51.196672] random: sshd: uninitialized urandom read (32 bytes read) 2018/08/09 17:35:05 parsed 1 programs [ 52.307922] random: cc1: uninitialized urandom read (8 bytes read) 2018/08/09 17:35:07 executed programs: 0 [ 53.527368] IPVS: ftp: loaded support on port[0] = 21 [ 53.745626] bridge0: port 1(bridge_slave_0) entered blocking state [ 53.752153] bridge0: port 1(bridge_slave_0) entered disabled state [ 53.759757] device bridge_slave_0 entered promiscuous mode [ 53.776702] bridge0: port 2(bridge_slave_1) entered blocking state [ 53.783341] bridge0: port 2(bridge_slave_1) entered disabled state [ 53.790695] device bridge_slave_1 entered promiscuous mode [ 53.807318] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 53.825211] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 53.867518] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 53.885982] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 53.950970] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 53.958382] team0: Port device team_slave_0 added [ 53.973923] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 53.981096] team0: Port device team_slave_1 added [ 53.997165] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 54.013468] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 54.031204] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 54.047950] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 54.169768] bridge0: port 2(bridge_slave_1) entered blocking state [ 54.176379] bridge0: port 2(bridge_slave_1) entered forwarding state [ 54.183209] bridge0: port 1(bridge_slave_0) entered blocking state [ 54.189706] bridge0: port 1(bridge_slave_0) entered forwarding state [ 54.624855] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 54.631051] 8021q: adding VLAN 0 to HW filter on device bond0 [ 54.675917] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 54.690248] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 54.728599] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 54.734894] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 54.742278] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 54.781757] 8021q: adding VLAN 0 to HW filter on device team0 2018/08/09 17:35:12 executed programs: 5 2018/08/09 17:35:18 executed programs: 12 2018/08/09 17:35:24 executed programs: 19 2018/08/09 17:35:29 executed programs: 26 [ 81.944530] WARNING: CPU: 1 PID: 4899 at net/ipv4/tcp.c:2422 tcp_close+0xf44/0x12d0 [ 81.952593] Kernel panic - not syncing: panic_on_warn set ... [ 81.952593] [ 81.960241] CPU: 1 PID: 4899 Comm: syz-executor0 Not tainted 4.18.0-rc8+ #181 [ 81.967520] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 81.976898] Call Trace: [ 81.979519] dump_stack+0x1c9/0x2b4 [ 81.983164] ? dump_stack_print_info.cold.2+0x52/0x52 [ 81.988469] panic+0x238/0x4e7 [ 81.991679] ? add_taint.cold.5+0x16/0x16 [ 81.995855] ? __warn.cold.8+0x148/0x1ba [ 81.999958] ? __warn.cold.8+0x117/0x1ba [ 82.004036] ? tcp_close+0xf44/0x12d0 [ 82.007865] __warn.cold.8+0x163/0x1ba [ 82.011777] ? tcp_close+0xf44/0x12d0 [ 82.015599] report_bug+0x252/0x2d0 [ 82.019243] do_error_trap+0x1fc/0x4d0 [ 82.023155] ? math_error+0x3e0/0x3e0 [ 82.027004] ? graph_lock+0x170/0x170 [ 82.030826] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 82.035715] do_invalid_op+0x1b/0x20 [ 82.039451] invalid_op+0x14/0x20 [ 82.042918] RIP: 0010:tcp_close+0xf44/0x12d0 [ 82.047322] Code: ff ff e8 0f f5 fd fb be 07 00 00 00 48 89 df 4c 8d 63 28 e8 ce f1 fe ff 48 89 df e8 c6 de fd ff e9 df f6 ff ff e8 ec f4 fd fb <0f> 0b e9 68 f8 ff ff e8 e0 f4 fd fb be 07 00 00 00 48 89 df e8 a3 [ 82.066704] RSP: 0018:ffff8801ab267698 EFLAGS: 00010293 [ 82.072093] RAX: ffff8801ce2285c0 RBX: ffff8801d75200c0 RCX: ffffffff857e1bc5 [ 82.079376] RDX: 0000000000000000 RSI: ffffffff857e2364 RDI: 0000000000000005 [ 82.086661] RBP: ffff8801ab267758 R08: ffff8801ce2285c0 R09: ffffed003aea4029 [ 82.093969] R10: ffffed003aea4029 R11: ffff8801d752014b R12: ffff8801d75200e8 [ 82.101259] R13: ffff8801d7520148 R14: ffff8801d75200d2 R15: 0000000000000007 [ 82.108561] ? tcp_close+0x7a5/0x12d0 [ 82.112382] ? tcp_close+0xf44/0x12d0 [ 82.116205] ? tcp_close+0xf44/0x12d0 [ 82.120039] ? tcp_check_oom+0x530/0x530 [ 82.124125] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 82.129683] ? ipv6_sock_mc_close+0x162/0x1d0 [ 82.134202] ? ip_mc_drop_socket+0x20f/0x270 [ 82.138634] ? down_write+0x8f/0x130 [ 82.142365] inet_release+0x104/0x1f0 [ 82.146183] inet6_release+0x50/0x70 [ 82.149909] __sock_release+0xd7/0x260 [ 82.153813] ? __sock_release+0x260/0x260 [ 82.158001] sock_close+0x19/0x20 [ 82.161469] __fput+0x355/0x8b0 [ 82.164779] ? fput+0x1a0/0x1a0 [ 82.168073] ? _raw_spin_unlock_irq+0x27/0x70 [ 82.172589] ____fput+0x15/0x20 [ 82.175892] task_work_run+0x1ec/0x2a0 [ 82.179803] ? task_work_cancel+0x250/0x250 [ 82.184151] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 82.189185] ? release_sock+0x1ec/0x2c0 [ 82.193179] ? trace_hardirqs_on+0xd/0x10 [ 82.197348] get_signal+0x1559/0x1970 [ 82.201234] ? __release_sock+0x3a0/0x3a0 [ 82.205433] ? ptrace_notify+0x130/0x130 [ 82.209537] ? task_work_add+0x123/0x1f0 [ 82.213624] ? cpumask_weight.constprop.5+0x3f/0x3f [ 82.218686] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 82.224260] ? security_socket_sendmsg+0x94/0xc0 [ 82.229045] do_signal+0x9c/0x21c0 [ 82.232606] ? __sys_sendto+0x475/0x670 [ 82.236600] ? __ia32_sys_getpeername+0xb0/0xb0 [ 82.241292] ? setup_sigcontext+0x7d0/0x7d0 [ 82.245633] ? schedule+0xfb/0x450 [ 82.249181] ? __sys_bind+0x1d1/0x440 [ 82.253007] ? exit_to_usermode_loop+0x8c/0x370 [ 82.257702] exit_to_usermode_loop+0x2e0/0x370 [ 82.262314] ? syscall_slow_exit_work+0x500/0x500 [ 82.267183] ? __x64_sys_sendto+0xe1/0x1a0 [ 82.271441] do_syscall_64+0x6be/0x820 [ 82.275340] ? finish_task_switch+0x1d3/0x870 [ 82.279859] ? syscall_return_slowpath+0x5e0/0x5e0 [ 82.284809] ? syscall_return_slowpath+0x31d/0x5e0 [ 82.289783] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 82.295167] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 82.300037] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 82.305246] RIP: 0033:0x457089 [ 82.308441] Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 82.327854] RSP: 002b:00007f2e94602c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 82.335579] RAX: 0000000000364650 RBX: 00007f2e946036d4 RCX: 0000000000457089 [ 82.342886] RDX: 08d2d601e8976aa5 RSI: 0000000020000100 RDI: 0000000000000004 [ 82.350194] RBP: 00000000009300a0 R08: 000000002031e000 R09: 000000000000001c [ 82.357479] R10: 0000000020000004 R11: 0000000000000246 R12: 00000000ffffffff [ 82.364772] R13: 00000000004d3d20 R14: 00000000004c8999 R15: 0000000000000000 [ 82.372526] Dumping ftrace buffer: [ 82.376285] (ftrace buffer empty) [ 82.379995] Kernel Offset: disabled [ 82.383619] Rebooting in 86400 seconds..