[....] Starting enhanced syslogd: rsyslogd[ 16.584729] audit: type=1400 audit(1518877635.384:5): avc: denied { syslog } for pid=4017 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 OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.081112] audit: type=1400 audit(1518877640.880:6): avc: denied { map } for pid=4156 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 '10.128.15.229' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 33.714193] audit: type=1400 audit(1518877652.513:7): avc: denied { map } for pid=4171 comm="syzkaller392644" path="/root/syzkaller392644743" 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 [ 33.998161] kasan: CONFIG_KASAN_INLINE enabled [ 34.002863] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 34.010259] general protection fault: 0000 [#1] SMP KASAN [ 34.015783] Dumping ftrace buffer: [ 34.019296] (ftrace buffer empty) [ 34.022980] Modules linked in: [ 34.026146] CPU: 1 PID: 4221 Comm: syzkaller392644 Not tainted 4.16.0-rc1+ #316 [ 34.033562] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.042898] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 34.047974] RSP: 0018:ffff8801cc7179a8 EFLAGS: 00010202 [ 34.053306] RAX: dffffc0000000000 RBX: ffff8801af7bb480 RCX: ffffffff851b4ed0 [ 34.060547] RDX: 0000000000000045 RSI: 00000000671453b9 RDI: 0000000000000228 [ 34.067797] RBP: ffff8801cc717c28 R08: 1ffff100398e2e77 R09: 0000000000000002 [ 34.075633] R10: ffff8801cc717878 R11: 0000000000000000 R12: ffff8801b12badc0 [ 34.082876] R13: ffff8801cc717c00 R14: 0000000000000000 R15: ffff8801cc717ae0 [ 34.090133] FS: 00007f29f41b3700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 34.098329] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.104181] CR2: 0000000020e71000 CR3: 00000001b6122006 CR4: 00000000001606e0 [ 34.111427] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.118676] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.125916] Call Trace: [ 34.128484] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 34.133645] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 34.138982] ? selinux_socket_connect+0x311/0x730 [ 34.143838] ? lock_downgrade+0x980/0x980 [ 34.148007] ? selinux_socket_setsockopt+0x80/0x80 [ 34.153588] ? lock_release+0xa40/0xa40 [ 34.157542] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 34.163402] ? __check_object_size+0x8b/0x530 [ 34.167878] ? __might_sleep+0x95/0x190 [ 34.171839] ? security_socket_connect+0x89/0xb0 [ 34.176573] SYSC_connect+0x213/0x4a0 [ 34.180356] ? SYSC_bind+0x410/0x410 [ 34.184044] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 34.188606] ? vmacache_find+0x5f/0x280 [ 34.192563] ? mm_fault_error+0x2c0/0x2c0 [ 34.196683] ? move_addr_to_kernel+0x60/0x60 [ 34.201072] ? SyS_accept+0x30/0x30 [ 34.204669] SyS_connect+0x24/0x30 [ 34.208184] do_syscall_64+0x280/0x940 [ 34.212040] ? __do_page_fault+0xc90/0xc90 [ 34.216247] ? finish_task_switch+0x1c0/0x860 [ 34.220710] ? finish_task_switch+0x181/0x860 [ 34.225177] ? syscall_return_slowpath+0x550/0x550 [ 34.230079] ? syscall_return_slowpath+0x2ac/0x550 [ 34.234987] ? prepare_exit_to_usermode+0x350/0x350 [ 34.240151] ? retint_user+0x18/0x18 [ 34.243835] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.248652] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 34.253815] RIP: 0033:0x44a5b9 [ 34.256974] RSP: 002b:00007f29f41b2da8 EFLAGS: 00000283 ORIG_RAX: 000000000000002a [ 34.264652] RAX: ffffffffffffffda RBX: 00000000006e1644 RCX: 000000000044a5b9 [ 34.271893] RDX: 0000000000000032 RSI: 0000000020e71000 RDI: 0000000000000008 [ 34.279132] RBP: 00000000006e1640 R08: 0000000000000000 R09: 0000000000000000 [ 34.286371] R10: 0000000000000000 R11: 0000000000000283 R12: 73696c6b63616c62 [ 34.293736] R13: 6273752f7665642f R14: 81696ccd63616c62 R15: 0000000000000011 [ 34.300993] Code: fe ff ff e8 00 bd 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 [ 34.320080] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801cc7179a8 [ 34.326733] ---[ end trace 37b17041c4e5a00b ]--- [ 34.331491] Kernel panic - not syncing: Fatal exception [ 34.337213] Dumping ftrace buffer: [ 34.340724] (ftrace buffer empty) [ 34.344405] Kernel Offset: disabled [ 34.348003] Rebooting in 86400 seconds..