[....] Starting enhanced syslogd: rsyslogd[ 15.588054] audit: type=1400 audit(1520330787.596:5): avc: denied { syslog } for pid=4072 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: [ 18.642822] audit: type=1400 audit(1520330790.651:6): avc: denied { map } for pid=4208 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 '10.128.0.50' (ECDSA) to the list of known hosts. executing program [ 32.311498] audit: type=1400 audit(1520330804.320:7): avc: denied { map } for pid=4225 comm="syzkaller256346" path="/root/syzkaller256346997" 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 [ 32.339898] audit: type=1400 audit(1520330804.348:8): avc: denied { name_bind } for pid=4226 comm="syzkaller256346" src=20000 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:port_t:s0 tclass=dccp_socket permissive=1 [ 32.362408] audit: type=1400 audit(1520330804.348:9): avc: denied { node_bind } for pid=4226 comm="syzkaller256346" src=20000 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:node_t:s0 tclass=dccp_socket permissive=1 [ 32.384958] audit: type=1400 audit(1520330804.351:10): avc: denied { name_connect } for pid=4226 comm="syzkaller256346" dest=20000 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:port_t:s0 tclass=dccp_socket 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 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 [ 33.955199] kasan: CONFIG_KASAN_INLINE enabled [ 33.959926] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.967315] general protection fault: 0000 [#1] SMP KASAN [ 33.972821] Dumping ftrace buffer: [ 33.976326] (ftrace buffer empty) [ 33.980004] Modules linked in: [ 33.983168] CPU: 1 PID: 4830 Comm: syzkaller256346 Not tainted 4.16.0-rc4+ #342 [ 33.990582] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.999906] RIP: 0010:dccp_write_xmit+0x69/0x1d0 [ 34.004629] RSP: 0018:ffff8801d90ef708 EFLAGS: 00010246 [ 34.009959] RAX: ffff8801d85fa400 RBX: ffff8801d1b86040 RCX: ffffffff854d7bd1 [ 34.017198] RDX: 0000000000000000 RSI: 1ffff1003b0bf593 RDI: ffff8801d1b86040 [ 34.024438] RBP: ffff8801d90ef738 R08: 1ffff1003b21dea3 R09: 0000000000000000 [ 34.031679] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801daf4c0c0 [ 34.038923] R13: dffffc0000000000 R14: ffffed003a370d03 R15: 0000000000000000 [ 34.046163] FS: 00007f3d6c238700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 34.054357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.060205] CR2: 000000002047b000 CR3: 00000001b0f13006 CR4: 00000000001606e0 [ 34.067448] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.074693] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.081927] Call Trace: [ 34.084489] dccp_sendmsg+0x95f/0xdc0 [ 34.088262] ? compat_dccp_getsockopt+0x70/0x70 [ 34.092898] ? rw_copy_check_uvector+0x1be/0x280 [ 34.097626] ? sock_has_perm+0x2a4/0x420 [ 34.101654] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 34.106987] ? dup_iter+0x232/0x260 [ 34.110581] ? kasan_check_write+0x14/0x20 [ 34.114788] inet_sendmsg+0x11f/0x5e0 [ 34.118556] ? copy_msghdr_from_user+0x3a6/0x590 [ 34.123279] ? __lock_is_held+0xb6/0x140 [ 34.127306] ? inet_create+0xf50/0xf50 [ 34.131162] ? selinux_socket_sendmsg+0x36/0x40 [ 34.135803] ? security_socket_sendmsg+0x89/0xb0 [ 34.140525] ? inet_create+0xf50/0xf50 [ 34.144383] sock_sendmsg+0xca/0x110 [ 34.148066] ___sys_sendmsg+0x767/0x8b0 [ 34.152009] ? copy_msghdr_from_user+0x590/0x590 [ 34.156733] ? __schedule+0x903/0x1ec0 [ 34.160592] ? __sched_text_start+0x8/0x8 [ 34.164712] ? __fget_light+0x2b2/0x3c0 [ 34.168655] ? fget_raw+0x20/0x20 [ 34.172080] ? __fd_install+0x288/0x740 [ 34.176024] ? get_unused_fd_flags+0x190/0x190 [ 34.180582] __sys_sendmsg+0xe5/0x210 [ 34.184348] ? __sys_sendmsg+0xe5/0x210 [ 34.188291] ? SyS_shutdown+0x290/0x290 [ 34.192237] ? SyS_futex+0x269/0x390 [ 34.195927] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 34.201435] SyS_sendmsg+0x2d/0x50 [ 34.204943] ? __sys_sendmsg+0x210/0x210 [ 34.208972] do_syscall_64+0x281/0x940 [ 34.212830] ? __do_page_fault+0xc90/0xc90 [ 34.217034] ? finish_task_switch+0x1c1/0x7e0 [ 34.221499] ? syscall_return_slowpath+0x550/0x550 [ 34.226394] ? syscall_return_slowpath+0x2ac/0x550 [ 34.231290] ? prepare_exit_to_usermode+0x350/0x350 [ 34.236274] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 34.241607] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.246418] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 34.251575] RIP: 0033:0x446c19 [ 34.254731] RSP: 002b:00007f3d6c237db8 EFLAGS: 00000293 ORIG_RAX: 000000000000002e [ 34.262406] RAX: ffffffffffffffda RBX: 00000000006e29e4 RCX: 0000000000446c19 [ 34.269641] RDX: 0000000020000000 RSI: 0000000020000140 RDI: 0000000000000006 [ 34.276879] RBP: 00000000006e29e0 R08: 0000000000000000 R09: 0000000000000000 [ 34.284115] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 [ 34.291351] R13: 00007fff4243261f R14: 00007f3d6c2389c0 R15: 0000000000000009 [ 34.298595] Code: 00 00 48 85 c0 49 89 c4 0f 84 fb 00 00 00 e8 5f 8a 23 fc 41 80 3e 00 0f 85 5a 01 00 00 4c 8b bb d8 07 00 00 4c 89 fa 48 c1 ea 03 <42> 80 3c 2a 00 0f 85 34 01 00 00 4d 8b 3f 49 8d bf b0 00 00 00 [ 34.317661] RIP: dccp_write_xmit+0x69/0x1d0 RSP: ffff8801d90ef708 [ 34.323922] ---[ end trace 208b13b56f4da922 ]--- [ 34.328661] Kernel panic - not syncing: Fatal exception [ 34.334328] Dumping ftrace buffer: [ 34.337833] (ftrace buffer empty) [ 34.341510] Kernel Offset: disabled [ 34.345104] Rebooting in 86400 seconds..