[ 12.994827] rsyslogd (3506) used greatest stack depth: 16832 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: [ 18.322817] audit: type=1400 audit(1517155540.707:6): avc: denied { map } for pid=3656 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 '10.128.0.39' (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 [ 24.608952] audit: type=1400 audit(1517155546.993:7): avc: denied { map } for pid=3670 comm="syzkaller476449" path="/root/syzkaller476449347" 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 [ 28.225147] kasan: CONFIG_KASAN_INLINE enabled [ 28.229794] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 28.237184] general protection fault: 0000 [#1] SMP KASAN [ 28.242710] Dumping ftrace buffer: [ 28.246239] (ftrace buffer empty) [ 28.249919] Modules linked in: [ 28.253092] CPU: 1 PID: 4279 Comm: syzkaller476449 Not tainted 4.15.0-rc9+ #283 [ 28.260514] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.269865] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 28.274945] RSP: 0018:ffff8801d5d0faf0 EFLAGS: 00010202 [ 28.280286] RAX: dffffc0000000000 RBX: ffff8801d93349c0 RCX: ffffffff85115570 [ 28.287532] RDX: 0000000000000045 RSI: 000000006af2835a RDI: 0000000000000228 [ 28.294773] RBP: ffff8801d5d0fd70 R08: 1ffff1003aba1e9f R09: 0000000000000002 [ 28.302020] R10: ffff8801d5d0f9c0 R11: 0000000000000000 R12: ffff8801d55584c0 [ 28.309266] R13: ffff8801d5d0fd48 R14: 0000000000000000 R15: ffff8801d5d0fc28 [ 28.316510] FS: 00000000006e6880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 28.324710] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.330569] CR2: 00000000205fafd2 CR3: 00000001d5efc003 CR4: 00000000001606e0 [ 28.337824] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.345110] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.352352] Call Trace: [ 28.354919] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 28.360096] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 28.365435] ? selinux_socket_connect+0x311/0x730 [ 28.370269] ? lock_downgrade+0x980/0x980 [ 28.374387] ? lock_downgrade+0x980/0x980 [ 28.378512] ? selinux_socket_setsockopt+0x80/0x80 [ 28.383413] ? lock_release+0xa40/0xa40 [ 28.387357] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 28.393226] ? __check_object_size+0x25d/0x4f0 [ 28.397785] ? handle_mm_fault+0x410/0x8d0 [ 28.401992] ? __might_sleep+0x95/0x190 [ 28.405945] ? security_socket_connect+0x89/0xb0 [ 28.410691] SYSC_connect+0x213/0x4a0 [ 28.414464] ? SYSC_bind+0x410/0x410 [ 28.418162] ? do_page_fault+0xee/0x720 [ 28.422112] ? __do_page_fault+0xc90/0xc90 [ 28.426324] ? sock_map_fd+0x53/0x90 [ 28.430016] ? SyS_socket+0x12d/0x1d0 [ 28.433803] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 28.438627] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.443621] SyS_connect+0x24/0x30 [ 28.447134] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 28.451870] RIP: 0033:0x440bc9 [ 28.455041] RSP: 002b:00007fff92162518 EFLAGS: 00000207 ORIG_RAX: 000000000000002a [ 28.462736] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440bc9 [ 28.469979] RDX: 000000000000002e RSI: 00000000205fafd2 RDI: 0000000000000004 [ 28.477229] RBP: 0000000000006e36 R08: 0000000000000000 R09: 0000000000000000 [ 28.484479] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000000000 [ 28.491719] R13: 0000000000000003 R14: 00000000006ce050 R15: 00000000004a256e [ 28.498973] Code: fe ff ff e8 00 d6 5e 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 e5 09 00 00 4c 89 fa 48 b8 00 00 00 00 00 fc [ 28.518110] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801d5d0faf0 [ 28.524721] ---[ end trace 2c0f77526b7ac025 ]--- [ 28.529478] Kernel panic - not syncing: Fatal exception [ 28.535295] Dumping ftrace buffer: [ 28.538816] (ftrace buffer empty) [ 28.542506] Kernel Offset: disabled [ 28.546107] Rebooting in 86400 seconds..