[....] Starting enhanced syslogd: rsyslogd[ 17.155812] audit: type=1400 audit(1519244153.059:5): avc: denied { syslog } for pid=4020 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: [ 23.243518] audit: type=1400 audit(1519244159.147:6): avc: denied { map } for pid=4161 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 '10.128.15.207' (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 [ 29.547629] audit: type=1400 audit(1519244165.451:7): avc: denied { map } for pid=4175 comm="syzkaller488075" path="/root/syzkaller488075262" 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 [ 29.735135] kasan: CONFIG_KASAN_INLINE enabled [ 29.739847] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 29.747226] general protection fault: 0000 [#1] SMP KASAN [ 29.752750] Dumping ftrace buffer: [ 29.756262] (ftrace buffer empty) [ 29.759942] Modules linked in: [ 29.763108] CPU: 0 PID: 4199 Comm: syzkaller488075 Not tainted 4.16.0-rc2+ #323 [ 29.770524] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.779862] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 29.784936] RSP: 0018:ffff8801b15279a8 EFLAGS: 00010202 [ 29.790272] RAX: dffffc0000000000 RBX: ffff8801b1492500 RCX: ffffffff851b65c0 [ 29.797512] RDX: 0000000000000045 RSI: 00000000a600c4f1 RDI: 0000000000000228 [ 29.805286] RBP: ffff8801b1527c28 R08: 1ffff100362a4e77 R09: 0000000000000002 [ 29.812528] R10: ffff8801b1527878 R11: 0000000000000000 R12: ffff8801ae11bb40 [ 29.819769] R13: ffff8801b1527c00 R14: 0000000000000000 R15: ffff8801b1527ae0 [ 29.827016] FS: 0000000001624880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 29.835217] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.841072] CR2: 0000000020348fd2 CR3: 00000001b1c9e004 CR4: 00000000001606f0 [ 29.848317] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.855559] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.862801] Call Trace: [ 29.865373] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 29.870537] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 29.875872] ? selinux_socket_connect+0x311/0x730 [ 29.880689] ? lock_downgrade+0x980/0x980 [ 29.884809] ? selinux_socket_setsockopt+0x80/0x80 [ 29.889709] ? lock_release+0xa40/0xa40 [ 29.893655] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 29.899513] ? __check_object_size+0x8b/0x530 [ 29.903985] ? __might_sleep+0x95/0x190 [ 29.907938] ? security_socket_connect+0x89/0xb0 [ 29.912668] SYSC_connect+0x213/0x4a0 [ 29.916451] ? SYSC_bind+0x410/0x410 [ 29.920145] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 29.924697] ? vmacache_find+0x5f/0x280 [ 29.928641] ? vmacache_update+0xfe/0x130 [ 29.932768] ? mm_fault_error+0x2c0/0x2c0 [ 29.936887] ? move_addr_to_kernel+0x60/0x60 [ 29.941269] ? SyS_accept+0x30/0x30 [ 29.944867] SyS_connect+0x24/0x30 [ 29.948381] do_syscall_64+0x280/0x940 [ 29.952239] ? __do_page_fault+0xc90/0xc90 [ 29.956445] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 29.961174] ? syscall_return_slowpath+0x550/0x550 [ 29.966073] ? syscall_return_slowpath+0x2ac/0x550 [ 29.970979] ? prepare_exit_to_usermode+0x350/0x350 [ 29.975967] ? retint_user+0x18/0x18 [ 29.979657] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.984475] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 29.989634] RIP: 0033:0x441449 [ 29.992794] RSP: 002b:00007ffd07b822e8 EFLAGS: 00000207 ORIG_RAX: 000000000000002a [ 30.000471] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441449 [ 30.007711] RDX: 000000000000002e RSI: 0000000020348fd2 RDI: 0000000000000004 [ 30.015059] RBP: 000000000000741c R08: 0000000000000000 R09: 0000000000000000 [ 30.022301] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000000000 [ 30.029544] R13: 00000000006cd428 R14: 0000000000000000 R15: 0000000000000000 [ 30.036794] Code: fe ff ff e8 10 a6 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 [ 30.055867] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801b15279a8 [ 30.062480] ---[ end trace b7ef5d843ec9a42c ]--- [ 30.067241] Kernel panic - not syncing: Fatal exception [ 30.073017] Dumping ftrace buffer: [ 30.076537] (ftrace buffer empty) [ 30.080219] Kernel Offset: disabled [ 30.083816] Rebooting in 86400 seconds..