[....] Starting enhanced syslogd: rsyslogd[ 13.022129] audit: type=1400 audit(1517133251.533:5): avc: denied { syslog } for pid=3524 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: [ 19.379534] audit: type=1400 audit(1517133257.891:6): avc: denied { map } for pid=3665 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 '10.128.15.233' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program [ 25.660864] audit: type=1400 audit(1517133264.172:7): avc: denied { map } for pid=3679 comm="syzkaller218051" path="/root/syzkaller218051832" 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 [ 25.806133] kasan: CONFIG_KASAN_INLINE enabled [ 25.810767] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 25.818145] general protection fault: 0000 [#1] SMP KASAN [ 25.823663] Dumping ftrace buffer: [ 25.827177] (ftrace buffer empty) [ 25.830857] Modules linked in: [ 25.834027] CPU: 1 PID: 3710 Comm: syzkaller218051 Not tainted 4.15.0-rc9+ #283 [ 25.841456] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.850803] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 25.855874] RSP: 0018:ffff8801d9befaf0 EFLAGS: 00010202 [ 25.861210] RAX: dffffc0000000000 RBX: ffff8801d904d180 RCX: ffffffff85115570 [ 25.868452] RDX: 0000000000000045 RSI: 0000000005b31f5d RDI: 0000000000000228 [ 25.875692] RBP: ffff8801d9befd70 R08: 1ffff1003b37de9f R09: 0000000000000002 [ 25.882933] R10: ffff8801d9bef9c0 R11: 0000000000000000 R12: ffff8801bceb4480 [ 25.890178] R13: ffff8801d9befd48 R14: 0000000000000000 R15: ffff8801d9befc28 [ 25.897423] FS: 00007f91bdb36700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 25.905620] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.911471] CR2: 00000000205fafd2 CR3: 00000001d9b84005 CR4: 00000000001606e0 [ 25.918716] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.925958] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.933197] Call Trace: [ 25.935775] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 25.940940] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 25.946294] ? selinux_socket_connect+0x311/0x730 [ 25.951114] ? lock_downgrade+0x980/0x980 [ 25.955234] ? selinux_socket_setsockopt+0x80/0x80 [ 25.960133] ? lock_release+0xa40/0xa40 [ 25.964078] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.969933] ? __check_object_size+0x25d/0x4f0 [ 25.974484] ? handle_mm_fault+0x410/0x8d0 [ 25.978691] ? __might_sleep+0x95/0x190 [ 25.982641] ? security_socket_connect+0x89/0xb0 [ 25.987369] SYSC_connect+0x213/0x4a0 [ 25.991149] ? SYSC_bind+0x410/0x410 [ 25.994843] ? do_page_fault+0xee/0x720 [ 25.998790] ? __do_page_fault+0xc90/0xc90 [ 26.002999] ? do_futex+0x22a0/0x22a0 [ 26.006775] ? SyS_socket+0x12d/0x1d0 [ 26.010547] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 26.015362] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.020356] SyS_connect+0x24/0x30 [ 26.023880] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 26.028608] RIP: 0033:0x446019 [ 26.031771] RSP: 002b:00007f91bdb35db8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 26.039458] RAX: ffffffffffffffda RBX: 00000000006debe4 RCX: 0000000000446019 [ 26.046708] RDX: 000000000000002e RSI: 00000000205fafd2 RDI: 0000000000000004 [ 26.053959] RBP: 00000000006debe0 R08: 0000000000000000 R09: 0000000000000000 [ 26.061200] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 26.068444] R13: 00007ffce32442af R14: 00007f91bdb369c0 R15: 0000000000000001 [ 26.075702] 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 [ 26.094786] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801d9befaf0 [ 26.101562] ---[ end trace a3a76a3dd4cc3949 ]--- [ 26.106316] Kernel panic - not syncing: Fatal exception [ 26.112111] Dumping ftrace buffer: [ 26.115620] (ftrace buffer empty) [ 26.119301] Kernel Offset: disabled [ 26.122898] Rebooting in 86400 seconds..