[....] Starting enhanced syslogd: rsyslogd[ 16.639102] audit: type=1400 audit(1517779292.237:5): avc: denied { syslog } for pid=4022 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 19.708013] audit: type=1400 audit(1517779295.306:6): 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 '10.128.15.228' (ECDSA) to the list of known hosts. executing program executing program [ 76.396601] audit: type=1400 audit(1517779351.995:7): avc: denied { map } for pid=4178 comm="syzkaller837289" path="/root/syzkaller837289006" 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 [ 76.436257] kasan: CONFIG_KASAN_INLINE enabled [ 76.441038] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 76.448619] general protection fault: 0000 [#1] SMP KASAN [ 76.454132] Dumping ftrace buffer: [ 76.457645] (ftrace buffer empty) [ 76.461326] Modules linked in: [ 76.464491] CPU: 0 PID: 4180 Comm: syzkaller837289 Not tainted 4.15.0+ #207 [ 76.471558] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.480892] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 76.485964] RSP: 0018:ffff8801b384f958 EFLAGS: 00010202 [ 76.491295] RAX: dffffc0000000000 RBX: ffff8801b3835100 RCX: ffffffff851a5940 [ 76.498535] RDX: 0000000000000045 RSI: 00000000b204cc5e RDI: 0000000000000228 [ 76.505774] RBP: ffff8801b384fbd8 R08: 1ffff10036709e6d R09: 0000000000000002 [ 76.513024] R10: ffff8801b384f828 R11: 0000000000000000 R12: ffff8801b43cd6c0 [ 76.520264] R13: ffff8801b384fbb0 R14: 0000000000000000 R15: ffff8801b384fa90 [ 76.527505] FS: 0000000000000000(0000) GS:ffff8801db400000(0063) knlGS:00000000099e2840 [ 76.535709] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 76.541579] CR2: 00000000205fafd2 CR3: 00000001b4360001 CR4: 00000000001606f0 [ 76.548819] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.556061] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.563313] Call Trace: [ 76.565886] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 76.571052] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 76.576387] ? selinux_socket_connect+0x311/0x730 [ 76.581203] ? lock_downgrade+0x980/0x980 [ 76.585320] ? selinux_socket_setsockopt+0x80/0x80 [ 76.590218] ? lock_release+0xa40/0xa40 [ 76.594163] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 76.600019] ? __check_object_size+0x8b/0x530 [ 76.604486] ? __might_sleep+0x95/0x190 [ 76.608442] ? security_socket_connect+0x89/0xb0 [ 76.613187] SYSC_connect+0x213/0x4a0 [ 76.616963] ? SYSC_bind+0x410/0x410 [ 76.620652] ? handle_mm_fault+0x476/0x930 [ 76.624859] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 76.629431] ? vmacache_find+0x5f/0x280 [ 76.633467] ? up_read+0x1a/0x40 [ 76.636810] ? __do_page_fault+0x3d6/0xc90 [ 76.641022] SyS_connect+0x24/0x30 [ 76.644531] ? SyS_accept+0x30/0x30 [ 76.648130] do_fast_syscall_32+0x3ee/0xf9d [ 76.652424] ? do_int80_syscall_32+0x9d0/0x9d0 [ 76.656978] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 76.661722] ? syscall_return_slowpath+0x2ad/0x550 [ 76.666622] ? prepare_exit_to_usermode+0x340/0x340 [ 76.671612] ? retint_user+0x18/0x18 [ 76.675300] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 76.680117] entry_SYSENTER_compat+0x54/0x63 [ 76.684496] RIP: 0023:0xf7fd2c79 [ 76.687828] RSP: 002b:00000000ffde1a8c EFLAGS: 00000286 ORIG_RAX: 000000000000016a [ 76.695507] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000205fafd2 [ 76.702747] RDX: 000000000000002e RSI: 00000000080d6e00 RDI: 00000000080eff04 [ 76.710398] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 76.717641] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 76.724881] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 76.732130] Code: fe ff ff e8 70 4c 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 [ 76.751205] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801b384f958 [ 76.757802] ---[ end trace 6eb35e1914c6bca2 ]--- [ 76.762548] Kernel panic - not syncing: Fatal exception [ 76.768234] Dumping ftrace buffer: [ 76.771744] (ftrace buffer empty) [ 76.775428] Kernel Offset: disabled [ 76.779024] Rebooting in 86400 seconds..