INIT: Entering runlevel: 2 [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 Warning: Permanently added '10.128.0.9' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 44.308424] BUG: unable to handle kernel NULL pointer dereference at 0000000000000028 [ 44.316464] IP: kernel_sock_shutdown+0x4a/0xc0 [ 44.321237] PGD 8000000196d62067 P4D 8000000196d62067 PUD 1969ee067 PMD 0 [ 44.328377] Oops: 0000 [#1] SMP PTI [ 44.332003] Dumping ftrace buffer: [ 44.335551] (ftrace buffer empty) [ 44.339253] Modules linked in: [ 44.342480] CPU: 0 PID: 4524 Comm: syz-executor510 Not tainted 4.16.0+ #87 [ 44.349489] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.358868] RIP: 0010:kernel_sock_shutdown+0x4a/0xc0 [ 44.363983] RSP: 0018:ffff8801c973fd20 EFLAGS: 00010246 [ 44.369438] RAX: ffffffff87b2a5fd RBX: ffff8801969a4418 RCX: ffff8801969a3b00 [ 44.376792] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 [ 44.384068] RBP: ffff8801c973fd60 R08: 0000000001080020 R09: 0000000000000002 [ 44.391340] R10: 0000000000000000 R11: 00000000fa8c75bc R12: 0000000000000000 [ 44.398612] R13: 0000000000000002 R14: 0000000000000028 R15: 0000000000000000 [ 44.405894] FS: 00007f84148ad700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 [ 44.414121] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.420006] CR2: 0000000000000028 CR3: 00000001be5c8000 CR4: 00000000001406f0 [ 44.427363] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 44.434646] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 44.441994] Call Trace: [ 44.444602] smc_shutdown+0x674/0x810 [ 44.448451] ? smc_listen+0xe70/0xe70 [ 44.452290] SYSC_shutdown+0x2a3/0x400 [ 44.456233] SyS_shutdown+0x44/0x60 [ 44.459909] do_syscall_64+0x309/0x430 [ 44.463815] ? SYSC_getsockopt+0x570/0x570 [ 44.468062] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 44.473250] RIP: 0033:0x4454f9 [ 44.476437] RSP: 002b:00007f84148acdb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000030 [ 44.484150] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004454f9 [ 44.491416] RDX: 00000000004454f9 RSI: 0000000000000002 RDI: 0000000000000003 [ 44.498684] RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000 [ 44.505953] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 44.513238] R13: 00007ffeef72b0ff R14: 00007f84148ad9c0 R15: 0000000000000003 [ 44.520507] Code: 8b 40 08 89 45 d0 8b 83 90 0c 00 00 89 45 d4 4c 8b 23 44 8b bb 88 0c 00 00 e8 73 7e ae f9 4c 89 75 c0 4d 8d 76 28 4d 85 e4 75 5d <4d> 8b 2e 4c 89 f7 e8 9b f3 05 fa 49 83 c5 60 48 83 38 00 75 52 [ 44.540005] RIP: kernel_sock_shutdown+0x4a/0xc0 RSP: ffff8801c973fd20 [ 44.546572] CR2: 0000000000000028 [ 44.550027] BUG: unable to handle kernel NULL pointer dereference at 0000000000000028 [ 44.550207] ---[ end trace 7d31262b7c5f7794 ]--- [ 44.558046] IP: kernel_sock_shutdown+0x4a/0xc0 [ 44.558067] PGD 8000000196d62067 [ 44.562828] Kernel panic - not syncing: Fatal exception [ 44.567376] P4D 8000000196d62067 PUD 1969ee067 PMD 0 [ 44.581368] Oops: 0000 [#2] SMP PTI [ 44.584988] Dumping ftrace buffer: [ 44.588520] (ftrace buffer empty) [ 44.592223] Modules linked in: [ 44.595430] CPU: 1 PID: 4526 Comm: syz-executor510 Tainted: G D 4.16.0+ #87 [ 44.603736] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.613107] RIP: 0010:kernel_sock_shutdown+0x4a/0xc0 [ 44.618207] RSP: 0018:ffff8801c93afd20 EFLAGS: 00010246 [ 44.623573] RAX: ffffffff87b2a5fd RBX: ffff8801d590c418 RCX: ffff8801d590bb00 [ 44.630844] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 [ 44.638122] RBP: ffff8801c93afd60 R08: 0000000001080020 R09: 0000000000000002 [ 44.645389] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 44.652657] R13: 0000000000000002 R14: 0000000000000028 R15: 0000000000000000 [ 44.659932] FS: 00007f841486b700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 [ 44.668158] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.674040] CR2: 0000000000000028 CR3: 00000001be5c8000 CR4: 00000000001406e0 [ 44.681310] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 44.688580] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 44.695846] Call Trace: [ 44.698454] smc_shutdown+0x674/0x810 [ 44.702306] ? smc_listen+0xe70/0xe70 [ 44.706145] SYSC_shutdown+0x2a3/0x400 [ 44.710092] SyS_shutdown+0x44/0x60 [ 44.713770] do_syscall_64+0x309/0x430 [ 44.717680] ? SYSC_getsockopt+0x570/0x570 [ 44.721927] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 44.727133] RIP: 0033:0x4454f9 [ 44.730327] RSP: 002b:00007f841486adb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000030 [ 44.738044] RAX: ffffffffffffffda RBX: 00000000006dac54 RCX: 00000000004454f9 [ 44.745311] RDX: 0000000000402254 RSI: 0000000000000002 RDI: 0000000000000004 [ 44.752579] RBP: 00000000006dac50 R08: 00007f841486b700 R09: 0000000000000000 [ 44.759856] R10: 00007f841486b700 R11: 0000000000000246 R12: 0000000000000000 [ 44.767123] R13: 00007ffeef72b0ff R14: 00007f841486b9c0 R15: 0000000000000003 [ 44.774391] Code: 8b 40 08 89 45 d0 8b 83 90 0c 00 00 89 45 d4 4c 8b 23 44 8b bb 88 0c 00 00 e8 73 7e ae f9 4c 89 75 c0 4d 8d 76 28 4d 85 e4 75 5d <4d> 8b 2e 4c 89 f7 e8 9b f3 05 fa 49 83 c5 60 48 83 38 00 75 52 [ 44.793905] RIP: kernel_sock_shutdown+0x4a/0xc0 RSP: ffff8801c93afd20 [ 44.800476] CR2: 0000000000000028 [ 44.804449] Dumping ftrace buffer: [ 44.807978] (ftrace buffer empty) [ 44.811669] Kernel Offset: disabled [ 44.815290] Rebooting in 86400 seconds..