[?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: [ 19.100647] audit: type=1400 audit(1517795909.060:6): avc: denied { map } for pid=4153 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 [ 58.136418] sshd (4165) used greatest stack depth: 16304 bytes left Warning: Permanently added '10.128.0.52' (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 [ 63.484129] audit: type=1400 audit(1517795953.443:7): avc: denied { map } for pid=4170 comm="syzkaller471098" path="/root/syzkaller471098658" 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 [ 67.023142] kasan: CONFIG_KASAN_INLINE enabled [ 67.027821] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 67.035208] general protection fault: 0000 [#1] SMP KASAN [ 67.040719] Dumping ftrace buffer: [ 67.044239] (ftrace buffer empty) [ 67.047921] Modules linked in: [ 67.051087] CPU: 0 PID: 4786 Comm: syzkaller471098 Not tainted 4.15.0+ #297 [ 67.058153] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.067498] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 67.072568] RSP: 0018:ffff8801acf079a8 EFLAGS: 00010202 [ 67.077904] RAX: dffffc0000000000 RBX: ffff8801acfdd580 RCX: ffffffff851a7980 [ 67.085146] RDX: 0000000000000045 RSI: 00000000154c0643 RDI: 0000000000000228 [ 67.092384] RBP: ffff8801acf07c28 R08: 1ffff100359e0e77 R09: 0000000000000002 [ 67.099627] R10: ffff8801acf07878 R11: 0000000000000000 R12: ffff8801ad78edc0 [ 67.106873] R13: ffff8801acf07c00 R14: 0000000000000000 R15: ffff8801acf07ae0 [ 67.114123] FS: 0000000002138880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 67.122318] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.128169] CR2: 00000000205fafd2 CR3: 00000001acdba004 CR4: 00000000001606f0 [ 67.135419] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.142661] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.149899] Call Trace: [ 67.152463] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 67.157627] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 67.162963] ? selinux_socket_connect+0x311/0x730 [ 67.167777] ? lock_downgrade+0x980/0x980 [ 67.171899] ? selinux_socket_setsockopt+0x80/0x80 [ 67.176799] ? lock_release+0xa40/0xa40 [ 67.180745] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 67.186604] ? __check_object_size+0x8b/0x530 [ 67.191074] ? __might_sleep+0x95/0x190 [ 67.195028] ? security_socket_connect+0x89/0xb0 [ 67.199767] SYSC_connect+0x213/0x4a0 [ 67.203540] ? SYSC_bind+0x410/0x410 [ 67.207227] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 67.211778] ? vmacache_find+0x5f/0x280 [ 67.215746] ? mm_fault_error+0x2c0/0x2c0 [ 67.219866] ? move_addr_to_kernel+0x60/0x60 [ 67.224248] SyS_connect+0x24/0x30 [ 67.227761] ? SyS_accept+0x30/0x30 [ 67.231361] do_syscall_64+0x282/0x940 [ 67.235219] ? __do_page_fault+0xc90/0xc90 [ 67.239432] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 67.244163] ? syscall_return_slowpath+0x550/0x550 [ 67.249153] ? syscall_return_slowpath+0x2ac/0x550 [ 67.254052] ? prepare_exit_to_usermode+0x350/0x350 [ 67.259038] ? retint_user+0x18/0x18 [ 67.262734] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 67.267554] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 67.272711] RIP: 0033:0x4417e9 [ 67.275874] RSP: 002b:00007ffc5546cc98 EFLAGS: 00000207 ORIG_RAX: 000000000000002a [ 67.283552] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 00000000004417e9 [ 67.290793] RDX: 000000000000002e RSI: 00000000205fafd2 RDI: 0000000000000004 [ 67.298033] RBP: 00000000006cf720 R08: 0000000000000000 R09: 0000000000000000 [ 67.305275] R10: 0000000000000000 R11: 0000000000000207 R12: 00007ffc5546ccc0 [ 67.312517] R13: 0000000000000000 R14: 00000000006d00a8 R15: 0000000000000267 [ 67.319769] Code: fe ff ff e8 30 2d 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 [ 67.338843] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801acf079a8 [ 67.345454] ---[ end trace c6468debf65ef0ab ]--- [ 67.350215] Kernel panic - not syncing: Fatal exception [ 67.355930] Dumping ftrace buffer: [ 67.359442] (ftrace buffer empty) [ 67.363125] Kernel Offset: disabled [ 67.366736] Rebooting in 86400 seconds..