[....] Starting enhanced syslogd: rsyslogd[ 12.788843] audit: type=1400 audit(1516593707.203:5): 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: [ 19.425518] audit: type=1400 audit(1516593713.840:6): avc: denied { map } for pid=3647 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 '10.128.0.49' (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 executing program executing program [ 30.030779] audit: type=1400 audit(1516593724.445:7): avc: denied { map } for pid=3662 comm="syzkaller132399" path="/root/syzkaller132399360" 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 [ 30.087155] kasan: CONFIG_KASAN_INLINE enabled [ 30.091777] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 30.099151] general protection fault: 0000 [#1] SMP KASAN [ 30.104663] Dumping ftrace buffer: [ 30.108171] (ftrace buffer empty) [ 30.111851] Modules linked in: [ 30.115030] CPU: 1 PID: 3697 Comm: syzkaller132399 Not tainted 4.15.0-rc8+ #273 [ 30.122441] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.131771] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 30.136839] RSP: 0018:ffff8801bc15faf0 EFLAGS: 00010202 [ 30.142169] RAX: dffffc0000000000 RBX: ffff8801d9ae2ec0 RCX: ffffffff8502ac10 [ 30.149406] RDX: 0000000000000045 RSI: 00000000ba00ebd8 RDI: 0000000000000228 [ 30.156643] RBP: ffff8801bc15fd70 R08: 1ffff1003782be9f R09: 0000000000000002 [ 30.163879] R10: ffff8801bc15f9c0 R11: 0000000000000000 R12: ffff8801d94aedc0 [ 30.171120] R13: ffff8801bc15fd48 R14: 0000000000000000 R15: ffff8801bc15fc28 [ 30.178360] FS: 00007fbbaeb01700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 30.186553] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.192406] CR2: 0000000020e71000 CR3: 00000001d995b004 CR4: 00000000001606e0 [ 30.199648] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.206886] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.214123] Call Trace: [ 30.216685] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 30.221854] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 30.227186] ? selinux_socket_connect+0x311/0x730 [ 30.232000] ? lock_downgrade+0x980/0x980 [ 30.236117] ? selinux_socket_setsockopt+0x80/0x80 [ 30.241015] ? lock_release+0xa40/0xa40 [ 30.244958] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 30.250814] ? __check_object_size+0x25d/0x4f0 [ 30.255363] ? handle_mm_fault+0x410/0x8d0 [ 30.259566] ? __might_sleep+0x95/0x190 [ 30.263515] ? security_socket_connect+0x89/0xb0 [ 30.268242] SYSC_connect+0x213/0x4a0 [ 30.272013] ? SYSC_bind+0x410/0x410 [ 30.275698] ? do_page_fault+0xee/0x720 [ 30.279643] ? __do_page_fault+0xc90/0xc90 [ 30.283853] ? do_futex+0x22a0/0x22a0 [ 30.287621] ? SyS_socket+0x12d/0x1d0 [ 30.291390] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 30.296202] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 30.301190] SyS_connect+0x24/0x30 [ 30.304701] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 30.309422] RIP: 0033:0x445ce9 [ 30.312581] RSP: 002b:00007fbbaeb00db8 EFLAGS: 00000297 ORIG_RAX: 000000000000002a [ 30.320258] RAX: ffffffffffffffda RBX: 00000000006dbc24 RCX: 0000000000445ce9 [ 30.327498] RDX: 0000000000000032 RSI: 0000000020e71000 RDI: 0000000000000005 [ 30.334737] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 30.342246] R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000000 [ 30.349486] R13: 00007ffdc8dac08f R14: 00007fbbaeb019c0 R15: 0000000000000005 [ 30.356732] Code: fe ff ff e8 60 7f 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 [ 30.375796] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801bc15faf0 [ 30.382393] ---[ end trace ab8bc181221a11fb ]--- [ 30.387131] Kernel panic - not syncing: Fatal exception [ 30.392811] Dumping ftrace buffer: [ 30.396320] (ftrace buffer empty) [ 30.400013] Kernel Offset: disabled [ 30.403607] Rebooting in 86400 seconds..