[....] Starting enhanced syslogd: rsyslogd[ 16.387956] audit: type=1400 audit(1518443830.641:5): avc: denied { syslog } for pid=4021 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.641916] audit: type=1400 audit(1518443836.895:6): avc: denied { map } for pid=4162 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.15.219' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 28.967304] audit: type=1400 audit(1518443843.221:7): avc: denied { map } for pid=4176 comm="syzkaller424817" path="/root/syzkaller424817182" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.690144] kasan: CONFIG_KASAN_INLINE enabled [ 30.694888] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 30.702264] general protection fault: 0000 [#1] SMP KASAN [ 30.707776] Dumping ftrace buffer: [ 30.711289] (ftrace buffer empty) [ 30.714982] Modules linked in: [ 30.718149] CPU: 1 PID: 4187 Comm: syzkaller424817 Not tainted 4.16.0-rc1+ #309 [ 30.725565] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.734909] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.739992] RSP: 0018:ffff8801b08d79a8 EFLAGS: 00010202 [ 30.745326] RAX: dffffc0000000000 RBX: ffff8801ac8b74c0 RCX: ffffffff851b2ed0 [ 30.752655] RDX: 0000000000000045 RSI: 000000004e906c70 RDI: 0000000000000228 [ 30.759902] RBP: ffff8801b08d7c28 R08: 1ffff1003611ae77 R09: 0000000000000002 [ 30.767143] R10: ffff8801b08d7878 R11: 0000000000000000 R12: ffff8801ac83edc0 [ 30.774384] R13: ffff8801b08d7c00 R14: 0000000000000000 R15: ffff8801b08d7ae0 [ 30.781636] FS: 00007f10d07fe700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 30.789830] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.795680] CR2: 0000000020e71000 CR3: 00000001ada5d005 CR4: 00000000001606e0 [ 30.802923] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.810162] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.817399] Call Trace: [ 30.819964] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 30.825128] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 30.830461] ? selinux_socket_connect+0x311/0x730 [ 30.835276] ? lock_downgrade+0x980/0x980 [ 30.839394] ? selinux_socket_setsockopt+0x80/0x80 [ 30.844292] ? lock_release+0xa40/0xa40 [ 30.848241] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 30.854098] ? __check_object_size+0x8b/0x530 [ 30.858565] ? __might_sleep+0x95/0x190 [ 30.862516] ? security_socket_connect+0x89/0xb0 [ 30.867265] SYSC_connect+0x213/0x4a0 [ 30.871038] ? SYSC_bind+0x410/0x410 [ 30.874729] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 30.879280] ? vmacache_find+0x5f/0x280 [ 30.883224] ? vmacache_update+0xfe/0x130 [ 30.887352] ? mm_fault_error+0x2c0/0x2c0 [ 30.891472] ? move_addr_to_kernel+0x60/0x60 [ 30.895852] SyS_connect+0x24/0x30 [ 30.899363] ? SyS_accept+0x30/0x30 [ 30.902962] do_syscall_64+0x282/0x940 [ 30.906818] ? __do_page_fault+0xc90/0xc90 [ 30.911022] ? finish_task_switch+0x1e2/0x890 [ 30.915485] ? finish_task_switch+0x1b9/0x890 [ 30.919951] ? syscall_return_slowpath+0x550/0x550 [ 30.924850] ? syscall_return_slowpath+0x2ac/0x550 [ 30.929752] ? prepare_exit_to_usermode+0x350/0x350 [ 30.934741] ? retint_user+0x18/0x18 [ 30.938426] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.943241] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 30.948400] RIP: 0033:0x445b59 [ 30.951558] RSP: 002b:00007f10d07fddb8 EFLAGS: 00000292 ORIG_RAX: 000000000000002a [ 30.959237] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445b59 [ 30.966477] RDX: 0000000000000032 RSI: 0000000020e71000 RDI: 00000000000002c0 [ 30.974283] RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000 [ 30.981531] R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 [ 30.988770] R13: 00007ffefb10da1f R14: 00007f10d07fe9c0 R15: 0000000000000009 [ 30.996018] Code: fe ff ff e8 80 ce 55 fc 4c 89 fa 49 8d be 28 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 c6 04 02 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 df 09 00 00 4c 89 fa 48 b8 00 00 00 00 00 fc [ 31.015100] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801b08d79a8 [ 31.021755] ---[ end trace 65be9996b8797af6 ]--- [ 31.026493] Kernel panic - not syncing: Fatal exception [ 31.032262] Dumping ftrace buffer: [ 31.035792] (ftrace buffer empty) [ 31.039498] Kernel Offset: disabled [ 31.043098] Rebooting in 86400 seconds..