[....] Starting enhanced syslogd: rsyslogd[ 16.726680] audit: type=1400 audit(1519434268.103:5): avc: denied { syslog } for pid=4087 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: [ 21.912274] audit: type=1400 audit(1519434273.288:6): avc: denied { map } for pid=4227 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 '10.128.0.10' (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 [ 28.212268] audit: type=1400 audit(1519434279.589:7): avc: denied { map } for pid=4241 comm="syzkaller246825" path="/root/syzkaller246825805" 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 [ 28.476390] l2tp_core: tunl 2: fd 44 wrong protocol, got 1, expected 17 executing program executing program executing program executing program executing program [ 28.543190] kasan: CONFIG_KASAN_INLINE enabled [ 28.547923] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 28.555330] general protection fault: 0000 [#1] SMP KASAN [ 28.560837] Dumping ftrace buffer: [ 28.564346] (ftrace buffer empty) [ 28.568028] Modules linked in: [ 28.571198] CPU: 1 PID: 4258 Comm: syzkaller246825 Not tainted 4.16.0-rc2+ #326 [ 28.578611] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.587939] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 28.593010] RSP: 0018:ffff8801a92c79a8 EFLAGS: 00010202 [ 28.598352] RAX: dffffc0000000000 RBX: ffff8801b0a89140 RCX: ffffffff854ac710 [ 28.605591] RDX: 0000000000000045 RSI: 0000000049049fbf RDI: 0000000000000228 [ 28.612833] RBP: ffff8801a92c7c28 R08: 1ffff10035258e77 R09: 0000000000000002 [ 28.620072] R10: ffff8801a92c7878 R11: 0000000000000000 R12: ffff8801b081f6c0 [ 28.627312] R13: ffff8801a92c7c00 R14: 0000000000000000 R15: ffff8801a92c7ae0 [ 28.634554] FS: 00007f46f7992700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 28.642750] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.648607] CR2: 0000000020e71000 CR3: 00000001b2387004 CR4: 00000000001606e0 [ 28.655852] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.663092] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.670332] Call Trace: [ 28.672899] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 28.678061] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 28.683407] ? selinux_socket_connect+0x311/0x730 [ 28.688223] ? lock_downgrade+0x980/0x980 [ 28.692341] ? selinux_socket_setsockopt+0x80/0x80 [ 28.697238] ? lock_release+0xa40/0xa40 [ 28.701184] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 28.707042] ? __check_object_size+0x8b/0x530 [ 28.711511] ? __might_sleep+0x95/0x190 [ 28.715461] ? security_socket_connect+0x89/0xb0 [ 28.720190] SYSC_connect+0x213/0x4a0 [ 28.723964] ? SYSC_bind+0x410/0x410 [ 28.727649] ? __handle_mm_fault+0x3b60/0x3b60 [ 28.732200] ? vmacache_find+0x5f/0x280 [ 28.736157] ? mm_fault_error+0x2c0/0x2c0 [ 28.740274] ? move_addr_to_kernel+0x60/0x60 [ 28.744655] ? SyS_accept+0x30/0x30 [ 28.748260] SyS_connect+0x24/0x30 [ 28.751772] do_syscall_64+0x280/0x940 [ 28.755628] ? __do_page_fault+0xc90/0xc90 [ 28.759832] ? _raw_spin_unlock_irq+0x27/0x70 [ 28.764307] ? finish_task_switch+0x1c1/0x7e0 [ 28.768773] ? syscall_return_slowpath+0x550/0x550 [ 28.773674] ? syscall_return_slowpath+0x2ac/0x550 [ 28.778575] ? prepare_exit_to_usermode+0x350/0x350 [ 28.783558] ? retint_user+0x18/0x18 [ 28.787244] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.792061] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 28.797220] RIP: 0033:0x445ee9 [ 28.800379] RSP: 002b:00007f46f7991db8 EFLAGS: 00000292 ORIG_RAX: 000000000000002a [ 28.808054] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445ee9 [ 28.815668] RDX: 0000000000000032 RSI: 0000000020e71000 RDI: 000000000000002e [ 28.822907] RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000 [ 28.830146] R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 [ 28.837384] R13: 00007ffc7f346ebf R14: 00007f46f79929c0 R15: 000000000000000f [ 28.844631] Code: fe ff ff e8 50 44 26 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 [ 28.863705] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801a92c79a8 [ 28.870338] ---[ end trace 05fe723d6efb8eda ]--- [ 28.875074] Kernel panic - not syncing: Fatal exception [ 28.880434] Dumping ftrace buffer: [ 28.883943] (ftrace buffer empty) [ 28.887624] Kernel Offset: disabled [ 28.891224] Rebooting in 86400 seconds..