[....] Starting enhanced syslogd: rsyslogd[ 14.077769] audit: type=1400 audit(1516177911.083:5): avc: denied { syslog } for pid=3506 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: [ 19.003511] audit: type=1400 audit(1516177916.009:6): avc: denied { map } for pid=3646 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 '10.128.0.33' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 25.276441] audit: type=1400 audit(1516177922.282:7): avc: denied { map } for pid=3661 comm="syzkaller504363" path="/root/syzkaller504363614" 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 [ 25.356269] kasan: CONFIG_KASAN_INLINE enabled [ 25.360921] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 25.368297] general protection fault: 0000 [#1] SMP KASAN [ 25.373818] Dumping ftrace buffer: [ 25.377330] (ftrace buffer empty) [ 25.381017] Modules linked in: [ 25.384186] CPU: 1 PID: 3664 Comm: syzkaller504363 Not tainted 4.15.0-rc8+ #264 [ 25.391601] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.400934] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 25.406007] RSP: 0018:ffff8801d99dfaf0 EFLAGS: 00010202 [ 25.411341] RAX: dffffc0000000000 RBX: ffff8801bbc66b00 RCX: ffffffff85024060 [ 25.418590] RDX: 0000000000000045 RSI: 00000000ba00ebd8 RDI: 0000000000000228 [ 25.425832] RBP: ffff8801d99dfd70 R08: 1ffff1003b33be9f R09: 0000000000000002 [ 25.433072] R10: ffff8801d99df9c0 R11: 0000000000000000 R12: ffff8801d9a5f240 [ 25.440320] R13: ffff8801d99dfd48 R14: 0000000000000000 R15: ffff8801d99dfc28 [ 25.447561] FS: 00007fdb40669700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 25.455757] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.461618] CR2: 00000000205fafd2 CR3: 00000001d9fee001 CR4: 00000000001606e0 [ 25.468860] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.476099] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.483339] Call Trace: [ 25.485905] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 25.491075] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 25.496411] ? selinux_socket_connect+0x311/0x730 [ 25.501226] ? lock_downgrade+0x980/0x980 [ 25.505346] ? selinux_socket_setsockopt+0x80/0x80 [ 25.510247] ? lock_release+0xa40/0xa40 [ 25.514191] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.520046] ? __check_object_size+0x25d/0x4f0 [ 25.524598] ? handle_mm_fault+0x410/0x8d0 [ 25.528807] ? __might_sleep+0x95/0x190 [ 25.532758] ? security_socket_connect+0x89/0xb0 [ 25.537489] SYSC_connect+0x213/0x4a0 [ 25.541261] ? SYSC_bind+0x410/0x410 [ 25.544951] ? do_page_fault+0xee/0x720 [ 25.548914] ? __do_page_fault+0xc90/0xc90 [ 25.553127] ? do_futex+0x22a0/0x22a0 [ 25.556897] ? SyS_socket+0x12d/0x1d0 [ 25.560670] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 25.565483] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.570474] SyS_connect+0x24/0x30 [ 25.573989] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 25.578721] RIP: 0033:0x445659 [ 25.581880] RSP: 002b:00007fdb40668db8 EFLAGS: 00000293 ORIG_RAX: 000000000000002a [ 25.589561] RAX: ffffffffffffffda RBX: 00000000006dac54 RCX: 0000000000445659 [ 25.596804] RDX: 000000000000002e RSI: 00000000205fafd2 RDI: 0000000000000004 [ 25.604051] RBP: 00000000006dac50 R08: 0000000000000000 R09: 0000000000000000 [ 25.611300] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 [ 25.618542] R13: 00007ffe13a1cdef R14: 00007fdb406699c0 R15: 0000000000000009 [ 25.625793] Code: fe ff ff e8 60 d7 6d 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 [ 25.644890] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801d99dfaf0 [ 25.651504] ---[ end trace 0616c9086dab921d ]--- [ 25.656268] Kernel panic - not syncing: Fatal exception [ 25.662062] Dumping ftrace buffer: [ 25.665578] (ftrace buffer empty) [ 25.669257] Kernel Offset: disabled [ 25.672855] Rebooting in 86400 seconds..