[....] Starting enhanced syslogd: rsyslogd[ 12.306450] audit: type=1400 audit(1516355313.469:5): avc: denied { syslog } for pid=3497 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: [ 20.667146] audit: type=1400 audit(1516355321.829:6): avc: denied { map } for pid=3636 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 '10.128.0.20' (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 executing program executing program executing program executing program executing program [ 26.955131] audit: type=1400 audit(1516355328.117:7): avc: denied { map } for pid=3650 comm="syzkaller695212" path="/root/syzkaller695212881" 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 [ 27.353204] kasan: CONFIG_KASAN_INLINE enabled [ 27.357877] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 27.365244] general protection fault: 0000 [#1] SMP KASAN [ 27.370751] Dumping ftrace buffer: [ 27.374264] (ftrace buffer empty) [ 27.377946] Modules linked in: [ 27.381112] CPU: 1 PID: 4055 Comm: syzkaller695212 Not tainted 4.15.0-rc8+ #268 [ 27.388526] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.397861] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 27.402933] RSP: 0018:ffff8801d8fffaf0 EFLAGS: 00010202 [ 27.408266] RAX: dffffc0000000000 RBX: ffff8801d8f77200 RCX: ffffffff850258e0 [ 27.415505] RDX: 0000000000000045 RSI: 00000000aae295b9 RDI: 0000000000000228 [ 27.422747] RBP: ffff8801d8fffd70 R08: 1ffff1003b1ffe9f R09: 0000000000000002 [ 27.429988] R10: ffff8801d8fff9c0 R11: 0000000000000000 R12: ffff8801d8ac2900 [ 27.437228] R13: ffff8801d8fffd48 R14: 0000000000000000 R15: ffff8801d8fffc28 [ 27.444480] FS: 00007f6fd7b8c700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 27.452674] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.458528] CR2: 0000000020e71000 CR3: 00000001d96f5003 CR4: 00000000001606e0 [ 27.465771] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.473011] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.480256] Call Trace: [ 27.482824] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 27.487990] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 27.493325] ? selinux_socket_connect+0x311/0x730 [ 27.498138] ? lock_downgrade+0x980/0x980 [ 27.502257] ? selinux_socket_setsockopt+0x80/0x80 [ 27.507155] ? lock_release+0xa40/0xa40 [ 27.511100] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 27.516955] ? __check_object_size+0x25d/0x4f0 [ 27.521506] ? handle_mm_fault+0x410/0x8d0 [ 27.525715] ? __might_sleep+0x95/0x190 [ 27.529663] ? security_socket_connect+0x89/0xb0 [ 27.534390] SYSC_connect+0x213/0x4a0 [ 27.538162] ? SYSC_bind+0x410/0x410 [ 27.541859] ? do_page_fault+0xee/0x720 [ 27.545806] ? __do_page_fault+0xc90/0xc90 [ 27.550017] ? do_futex+0x22a0/0x22a0 [ 27.553789] ? SyS_socket+0x12d/0x1d0 [ 27.557562] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 27.562375] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.567362] SyS_connect+0x24/0x30 [ 27.570875] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 27.575605] RIP: 0033:0x445cf9 [ 27.578777] RSP: 002b:00007f6fd7b8bdb8 EFLAGS: 00000297 ORIG_RAX: 000000000000002a [ 27.586454] RAX: ffffffffffffffda RBX: 00000000006dbc24 RCX: 0000000000445cf9 [ 27.593697] RDX: 0000000000000032 RSI: 0000000020e71000 RDI: 0000000000000007 [ 27.600938] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 27.608179] R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000000 [ 27.615421] R13: 00007ffccef5583f R14: 00007f6fd7b8c9c0 R15: 0000000000000005 [ 27.622670] Code: fe ff ff e8 b0 d1 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 [ 27.641742] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801d8fffaf0 [ 27.648348] ---[ end trace 03d78ec43e5b7ed7 ]--- [ 27.653085] Kernel panic - not syncing: Fatal exception [ 27.658806] Dumping ftrace buffer: [ 27.662324] (ftrace buffer empty) [ 27.666015] Kernel Offset: disabled [ 27.669624] Rebooting in 86400 seconds..