[ 17.147895] rsyslogd (3998) used greatest stack depth: 16496 bytes left [?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: [ 22.333906] audit: type=1400 audit(1517576910.835:6): avc: denied { map } for pid=4150 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 '10.128.0.59' (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 [ 28.645361] audit: type=1400 audit(1517576917.147:7): avc: denied { map } for pid=4164 comm="syzkaller611373" path="/root/syzkaller611373237" 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 [ 30.505151] kasan: CONFIG_KASAN_INLINE enabled [ 30.509846] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 30.517386] general protection fault: 0000 [#1] SMP KASAN [ 30.522910] Dumping ftrace buffer: [ 30.526424] (ftrace buffer empty) [ 30.530108] Modules linked in: [ 30.533279] CPU: 1 PID: 4714 Comm: syzkaller611373 Not tainted 4.15.0+ #292 [ 30.540347] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.549680] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 30.554753] RSP: 0018:ffff8801afd77af0 EFLAGS: 00010202 [ 30.560100] RAX: dffffc0000000000 RBX: ffff8801af9d53c0 RCX: ffffffff851a46a0 [ 30.567349] RDX: 0000000000000045 RSI: 0000000019ee5aa2 RDI: 0000000000000228 [ 30.574589] RBP: ffff8801afd77d70 R08: 1ffff10035faee9f R09: 0000000000000002 [ 30.581834] R10: ffff8801afd779c0 R11: 0000000000000000 R12: ffff8801af897b40 [ 30.589077] R13: ffff8801afd77d48 R14: 0000000000000000 R15: ffff8801afd77c28 [ 30.596334] FS: 00007f6d202e9700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 30.604533] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.610394] CR2: 00000000205fafd2 CR3: 00000001b1db4003 CR4: 00000000001606e0 [ 30.617639] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.624884] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.632130] Call Trace: [ 30.634700] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 30.639876] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 30.645220] ? selinux_socket_connect+0x311/0x730 [ 30.650043] ? lock_downgrade+0x980/0x980 [ 30.654175] ? selinux_socket_setsockopt+0x80/0x80 [ 30.659077] ? lock_release+0xa40/0xa40 [ 30.663030] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 30.668906] ? __check_object_size+0x25d/0x4f0 [ 30.673461] ? handle_mm_fault+0x476/0x930 [ 30.677670] ? __might_sleep+0x95/0x190 [ 30.681626] ? security_socket_connect+0x89/0xb0 [ 30.686358] SYSC_connect+0x213/0x4a0 [ 30.690136] ? SYSC_bind+0x410/0x410 [ 30.693842] ? do_page_fault+0xee/0x720 [ 30.697801] ? __do_page_fault+0xc90/0xc90 [ 30.702028] ? do_futex+0x22a0/0x22a0 [ 30.705812] ? SyS_socket+0x12d/0x1d0 [ 30.709595] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 30.714411] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 30.719408] SyS_connect+0x24/0x30 [ 30.722926] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 30.727656] RIP: 0033:0x446089 [ 30.730817] RSP: 002b:00007f6d202e8db8 EFLAGS: 00000297 ORIG_RAX: 000000000000002a [ 30.738510] RAX: ffffffffffffffda RBX: 00000000006debe4 RCX: 0000000000446089 [ 30.745782] RDX: 000000000000002e RSI: 00000000205fafd2 RDI: 0000000000000004 [ 30.753027] RBP: 00000000006debe0 R08: 0000000000000000 R09: 0000000000000000 [ 30.760269] R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000000 [ 30.767508] R13: 00007ffcff2acd4f R14: 00007f6d202e99c0 R15: 0000000000000001 [ 30.774758] Code: fe ff ff e8 10 5f 56 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 [ 30.793835] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801afd77af0 [ 30.800463] ---[ end trace 26968168ea8f7364 ]--- [ 30.805243] Kernel panic - not syncing: Fatal exception [ 30.811097] Dumping ftrace buffer: [ 30.814625] (ftrace buffer empty) [ 30.818328] Kernel Offset: disabled [ 30.821944] Rebooting in 86400 seconds..