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 '10.128.10.43' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 41.034763] BUG: unable to handle kernel NULL pointer dereference at 0000000000000028 [ 41.042825] IP: kernel_sock_shutdown+0x4a/0xc0 [ 41.047400] PGD 80000001a28fe067 P4D 80000001a28fe067 PUD 1aa39d067 PMD 0 [ 41.054444] Oops: 0000 [#1] SMP PTI [ 41.058071] Dumping ftrace buffer: [ 41.061619] (ftrace buffer empty) [ 41.065339] Modules linked in: [ 41.068571] CPU: 0 PID: 4515 Comm: syz-executor750 Not tainted 4.16.0+ #87 [ 41.075600] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.085351] RIP: 0010:kernel_sock_shutdown+0x4a/0xc0 [ 41.090463] RSP: 0018:ffff88019becfd20 EFLAGS: 00010246 [ 41.095857] RAX: ffffffff87b2a5fd RBX: ffff8801987f6198 RCX: ffff8801987f5880 [ 41.103132] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 [ 41.110415] RBP: ffff88019becfd60 R08: 0000000001080020 R09: 0000000000000002 [ 41.117693] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 41.124978] R13: 0000000000000002 R14: 0000000000000028 R15: 0000000000000000 [ 41.132261] FS: 00007f3bce685700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 [ 41.140496] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.146388] CR2: 0000000000000028 CR3: 000000019aea0000 CR4: 00000000001406f0 [ 41.153670] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.160960] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.168238] Call Trace: [ 41.170864] smc_shutdown+0x674/0x810 [ 41.174720] ? smc_listen+0xe70/0xe70 [ 41.178587] SYSC_shutdown+0x2a3/0x400 [ 41.182553] SyS_shutdown+0x44/0x60 [ 41.186241] do_syscall_64+0x309/0x430 [ 41.190176] ? SYSC_getsockopt+0x570/0x570 [ 41.194447] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 41.199649] RIP: 0033:0x4454f9 [ 41.202840] RSP: 002b:00007f3bce684db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000030 [ 41.210564] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004454f9 [ 41.217841] RDX: 00000000004454f9 RSI: 0000000000000002 RDI: 0000000000000003 [ 41.225120] RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000 [ 41.232399] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 41.239679] R13: 00007ffe623299af R14: 00007f3bce6859c0 R15: 0000000000000003 [ 41.246974] 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 [ 41.266618] RIP: kernel_sock_shutdown+0x4a/0xc0 RSP: ffff88019becfd20 [ 41.273199] CR2: 0000000000000028 [ 41.276667] BUG: unable to handle kernel NULL pointer dereference at 0000000000000028 [ 41.276884] ---[ end trace 1665d976a9f46516 ]--- [ 41.284699] IP: kernel_sock_shutdown+0x4a/0xc0 [ 41.284724] PGD 80000001a28fe067 [ 41.289497] Kernel panic - not syncing: Fatal exception [ 41.294040] P4D 80000001a28fe067 PUD 1aa39d067 PMD 0 [ 41.308030] Oops: 0000 [#2] SMP PTI [ 41.311665] Dumping ftrace buffer: [ 41.315201] (ftrace buffer empty) [ 41.318921] Modules linked in: [ 41.322140] CPU: 1 PID: 4517 Comm: syz-executor750 Tainted: G D 4.16.0+ #87 [ 41.330457] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.339846] RIP: 0010:kernel_sock_shutdown+0x4a/0xc0 [ 41.344957] RSP: 0018:ffff8801c91efd20 EFLAGS: 00010246 [ 41.350354] RAX: ffffffff87b2a5fd RBX: ffff88019a682698 RCX: ffff88019a681d80 [ 41.357629] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 [ 41.364928] RBP: ffff8801c91efd60 R08: 0000000001080020 R09: 0000000000000002 [ 41.372252] R10: 0000000000000000 R11: 00000000fa8c75bc R12: 0000000000000000 [ 41.379525] R13: 0000000000000002 R14: 0000000000000028 R15: 0000000000000000 [ 41.386899] FS: 00007f3bce643700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 [ 41.395138] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.401034] CR2: 0000000000000028 CR3: 000000019aea0000 CR4: 00000000001406e0 [ 41.408319] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.415604] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.422881] Call Trace: [ 41.425508] smc_shutdown+0x674/0x810 [ 41.429369] ? smc_listen+0xe70/0xe70 [ 41.433221] SYSC_shutdown+0x2a3/0x400 [ 41.437177] SyS_shutdown+0x44/0x60 [ 41.440876] do_syscall_64+0x309/0x430 [ 41.444796] ? SYSC_getsockopt+0x570/0x570 [ 41.449054] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 41.454255] RIP: 0033:0x4454f9 [ 41.457448] RSP: 002b:00007f3bce642db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000030 [ 41.465175] RAX: ffffffffffffffda RBX: 00000000006dac54 RCX: 00000000004454f9 [ 41.472456] RDX: 0000000000402254 RSI: 0000000000000002 RDI: 0000000000000004 [ 41.479740] RBP: 00000000006dac50 R08: 00007f3bce643700 R09: 0000000000000000 [ 41.487025] R10: 00007f3bce643700 R11: 0000000000000246 R12: 0000000000000000 [ 41.494305] R13: 00007ffe623299af R14: 00007f3bce6439c0 R15: 0000000000000003 [ 41.501588] 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 [ 41.521138] RIP: kernel_sock_shutdown+0x4a/0xc0 RSP: ffff8801c91efd20 [ 41.527720] CR2: 0000000000000028 [ 41.531721] Dumping ftrace buffer: [ 41.535287] (ftrace buffer empty) [ 41.538988] Kernel Offset: disabled [ 41.542615] Rebooting in 86400 seconds..