[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 25.149858] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 28.861683] random: sshd: uninitialized urandom read (32 bytes read) [ 29.341928] random: sshd: uninitialized urandom read (32 bytes read) [ 29.944012] random: sshd: uninitialized urandom read (32 bytes read) [ 823.800753] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.39' (ECDSA) to the list of known hosts. [ 829.487223] random: sshd: uninitialized urandom read (32 bytes read) 2018/09/12 09:47:45 parsed 1 programs [ 830.603443] random: cc1: uninitialized urandom read (8 bytes read) 2018/09/12 09:47:47 executed programs: 0 [ 831.839044] IPVS: ftp: loaded support on port[0] = 21 [ 832.091184] bridge0: port 1(bridge_slave_0) entered blocking state [ 832.098241] bridge0: port 1(bridge_slave_0) entered disabled state [ 832.105487] device bridge_slave_0 entered promiscuous mode [ 832.113927] ip (5382) used greatest stack depth: 16664 bytes left [ 832.125140] bridge0: port 2(bridge_slave_1) entered blocking state [ 832.131907] bridge0: port 2(bridge_slave_1) entered disabled state [ 832.139186] device bridge_slave_1 entered promiscuous mode [ 832.157340] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 832.175447] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 832.226003] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 832.246788] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 832.323055] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 832.330597] team0: Port device team_slave_0 added [ 832.347673] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 832.354906] team0: Port device team_slave_1 added [ 832.372436] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 832.395001] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 832.414892] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 832.434924] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 832.585296] bridge0: port 2(bridge_slave_1) entered blocking state [ 832.591795] bridge0: port 2(bridge_slave_1) entered forwarding state [ 832.598737] bridge0: port 1(bridge_slave_0) entered blocking state [ 832.605093] bridge0: port 1(bridge_slave_0) entered forwarding state [ 833.132960] 8021q: adding VLAN 0 to HW filter on device bond0 [ 833.186108] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 833.239149] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 833.245375] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 833.253708] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 833.299246] 8021q: adding VLAN 0 to HW filter on device team0 2018/09/12 09:47:52 executed programs: 102 2018/09/12 09:47:57 executed programs: 263 2018/09/12 09:48:02 executed programs: 426 2018/09/12 09:48:07 executed programs: 588 2018/09/12 09:48:12 executed programs: 745 2018/09/12 09:48:17 executed programs: 904 2018/09/12 09:48:22 executed programs: 1063 2018/09/12 09:48:27 executed programs: 1223 2018/09/12 09:48:32 executed programs: 1383 2018/09/12 09:48:37 executed programs: 1535 2018/09/12 09:48:42 executed programs: 1686 2018/09/12 09:48:47 executed programs: 1838 2018/09/12 09:48:52 executed programs: 1999 2018/09/12 09:48:57 executed programs: 2158 [ 902.206428] kasan: CONFIG_KASAN_INLINE enabled [ 902.211244] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 902.218680] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 902.224973] CPU: 0 PID: 18627 Comm: syz-executor0 Not tainted 4.19.0-rc2+ #51 [ 902.232254] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 902.241708] RIP: 0010:tcp_cleanup_ulp+0xbe/0x140 [ 902.246472] Code: 02 00 0f 85 8a 00 00 00 49 8b 9c 24 88 06 00 00 e8 b7 43 ec fa 48 8d 7b 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 51 48 8b 7b 38 e8 b3 a2 e0 fa 4c 89 ea 48 b8 00 00 [ 902.265383] RSP: 0018:ffff8801b92f76c0 EFLAGS: 00010202 [ 902.270735] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff10037e84da6 [ 902.277988] RDX: 0000000000000007 RSI: ffffffff86928b79 RDI: 0000000000000038 [ 902.285256] RBP: ffff8801b92f76e0 R08: 0000000000000000 R09: ffffed003b5c4732 [ 902.292526] R10: ffffed003b5c4732 R11: ffff8801dae23993 R12: ffff8801be338f40 [ 902.299781] R13: ffff8801be3395c8 R14: ffffffff81938ae0 R15: ffff8801b92f7800 [ 902.307038] FS: 0000000001a06940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 902.315249] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 902.321117] CR2: 00007f4d5d4b8db8 CR3: 00000001bc421000 CR4: 00000000001406f0 [ 902.328390] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 902.335649] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 902.342898] Call Trace: [ 902.345487] tcp_v4_destroy_sock+0x161/0x990 [ 902.349885] ? ip_queue_xmit+0x70/0x70 [ 902.353836] ? graph_lock+0x170/0x170 [ 902.357652] ? tcp_close+0x737/0x1300 [ 902.361493] ? release_sock+0x1ec/0x2c0 [ 902.365466] ? lock_release+0x970/0x970 [ 902.369505] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 902.375118] ? check_preemption_disabled+0x48/0x200 [ 902.380185] tcp_v6_destroy_sock+0x15/0x20 [ 902.384413] inet_csk_destroy_sock+0x19f/0x440 [ 902.388992] tcp_close+0xba7/0x1300 [ 902.392617] ? tcp_check_oom+0x530/0x530 [ 902.396735] bpf_tcp_close+0x93c/0x10c0 [ 902.400716] ? trace_hardirqs_on+0xbd/0x310 [ 902.405028] ? debug_object_deactivate+0x450/0x450 [ 902.409941] ? tcp_check_oom+0x530/0x530 [ 902.413993] ? sock_hash_free+0x6a0/0x6a0 [ 902.418147] ? lock_release+0x970/0x970 [ 902.422195] ? arch_local_save_flags+0x40/0x40 [ 902.426788] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 902.432237] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 902.437803] ? ipv6_sock_ac_close+0x34f/0x470 [ 902.442294] ? ipv6_sock_mc_close+0x162/0x1d0 [ 902.446805] ? ip_mc_drop_socket+0x20b/0x270 [ 902.451235] ? down_write+0x8a/0x130 [ 902.454938] inet_release+0x104/0x1f0 [ 902.458730] inet6_release+0x50/0x70 [ 902.462430] __sock_release+0xd7/0x250 [ 902.466301] ? __sock_release+0x250/0x250 [ 902.470431] sock_close+0x19/0x20 [ 902.473948] __fput+0x385/0xa30 [ 902.477229] ? get_max_files+0x20/0x20 [ 902.481111] ? trace_hardirqs_on+0xbd/0x310 [ 902.485471] ? kasan_check_read+0x11/0x20 [ 902.489634] ? task_work_run+0x1af/0x2a0 [ 902.493698] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 902.499149] ? kasan_check_write+0x14/0x20 [ 902.503414] ? do_raw_spin_lock+0xc1/0x200 [ 902.507645] ____fput+0x15/0x20 [ 902.510914] task_work_run+0x1e8/0x2a0 [ 902.514788] ? task_work_cancel+0x240/0x240 [ 902.519113] ? copy_fd_bitmaps+0x210/0x210 [ 902.523356] ? do_syscall_64+0x9a/0x820 [ 902.527333] exit_to_usermode_loop+0x318/0x380 [ 902.531901] ? syscall_slow_exit_work+0x520/0x520 [ 902.536733] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 902.542290] do_syscall_64+0x6be/0x820 [ 902.546220] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 902.551580] ? syscall_return_slowpath+0x5e0/0x5e0 [ 902.556503] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 902.561333] ? trace_hardirqs_off+0x300/0x300 [ 902.565815] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 902.570815] ? prepare_exit_to_usermode+0x291/0x3b0 [ 902.575820] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 902.580656] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 902.585829] RIP: 0033:0x410e91 [ 902.589007] Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 19 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 [ 902.607896] RSP: 002b:00007ffd70bafde0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 902.615593] RAX: 0000000000000000 RBX: 0000000000000006 RCX: 0000000000410e91 [ 902.622846] RDX: 0000000000000000 RSI: 0000000000731160 RDI: 0000000000000005 [ 902.630098] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffffffffffff [ 902.637377] R10: 00000000009300a0 R11: 0000000000000293 R12: 0000000000000008 [ 902.644633] R13: 00000000000dc3fa R14: 0000000000000875 R15: badc0ffeebadface [ 902.651892] Modules linked in: [ 902.655074] Dumping ftrace buffer: [ 902.658596] (ftrace buffer empty) [ 902.662397] ---[ end trace d9e209a7bdcaec58 ]--- [ 902.667207] RIP: 0010:tcp_cleanup_ulp+0xbe/0x140 [ 902.671972] Code: 02 00 0f 85 8a 00 00 00 49 8b 9c 24 88 06 00 00 e8 b7 43 ec fa 48 8d 7b 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 51 48 8b 7b 38 e8 b3 a2 e0 fa 4c 89 ea 48 b8 00 00 [ 902.690921] RSP: 0018:ffff8801b92f76c0 EFLAGS: 00010202 [ 902.696328] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff10037e84da6 [ 902.703676] RDX: 0000000000000007 RSI: ffffffff86928b79 RDI: 0000000000000038 [ 902.710990] RBP: ffff8801b92f76e0 R08: 0000000000000000 R09: ffffed003b5c4732 [ 902.718296] R10: ffffed003b5c4732 R11: ffff8801dae23993 R12: ffff8801be338f40 [ 902.725568] R13: ffff8801be3395c8 R14: ffffffff81938ae0 R15: ffff8801b92f7800 [ 902.732878] FS: 0000000001a06940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 902.741143] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 902.747049] CR2: 00007f4d5d4b8db8 CR3: 00000001bc421000 CR4: 00000000001406f0 [ 902.754330] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 902.761642] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 902.768937] Kernel panic - not syncing: Fatal exception in interrupt [ 902.775774] Dumping ftrace buffer: [ 902.779315] (ftrace buffer empty) [ 902.783718] Kernel Offset: disabled [ 902.787341] Rebooting in 86400 seconds..