[....] Starting enhanced syslogd: rsyslogd[ 16.869168] audit: type=1400 audit(1520330846.529:5): avc: denied { syslog } for pid=4082 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: [ 22.833368] audit: type=1400 audit(1520330852.494:6): avc: denied { map } for pid=4222 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 '10.128.0.42' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 29.268471] audit: type=1400 audit(1520330858.929:7): avc: denied { map } for pid=4236 comm="syzkaller851587" path="/root/syzkaller851587995" 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 [ 29.294447] audit: type=1400 audit(1520330858.929:8): avc: denied { name_bind } for pid=4237 comm="syzkaller851587" 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 executing program executing program executing program executing program executing program executing program executing program executing program [ 29.316931] audit: type=1400 audit(1520330858.929:9): avc: denied { node_bind } for pid=4237 comm="syzkaller851587" 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 [ 29.339429] audit: type=1400 audit(1520330858.929:10): avc: denied { name_connect } for pid=4237 comm="syzkaller851587" 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 [ 29.438151] kasan: CONFIG_KASAN_INLINE enabled [ 29.442843] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 29.450215] general protection fault: 0000 [#1] SMP KASAN [ 29.455732] Dumping ftrace buffer: [ 29.459240] (ftrace buffer empty) [ 29.462922] Modules linked in: [ 29.466089] CPU: 1 PID: 4286 Comm: syzkaller851587 Not tainted 4.16.0-rc2+ #253 [ 29.473504] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.482841] RIP: 0010:dccp_write_xmit+0x69/0x1d0 [ 29.487589] RSP: 0018:ffff8801af74f708 EFLAGS: 00010246 [ 29.492923] RAX: ffff8801b0d8a600 RBX: ffff8801b4e97440 RCX: ffffffff854e0dc1 [ 29.500163] RDX: 0000000000000000 RSI: 1ffff100361b15d3 RDI: ffff8801b4e97440 [ 29.507405] RBP: ffff8801af74f738 R08: 1ffff10035ee9ea3 R09: 0000000000000000 [ 29.514645] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801b10d9700 [ 29.521883] R13: dffffc0000000000 R14: ffffed00369d2f84 R15: 0000000000000000 [ 29.529123] FS: 00007f8704756700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 29.537319] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.543168] CR2: 000000002047b000 CR3: 00000001d0f49002 CR4: 00000000001606e0 [ 29.550416] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.557656] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.564897] Call Trace: [ 29.567460] dccp_sendmsg+0x95f/0xdc0 [ 29.571235] ? compat_dccp_getsockopt+0x70/0x70 [ 29.575876] ? rw_copy_check_uvector+0x1be/0x280 [ 29.580605] ? sock_has_perm+0x2a4/0x420 [ 29.584637] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 29.589968] ? import_iovec+0x2/0x430 [ 29.593752] ? kasan_check_write+0x14/0x20 [ 29.597961] inet_sendmsg+0x11f/0x5e0 [ 29.601731] ? copy_msghdr_from_user+0x3a6/0x590 [ 29.606459] ? __lock_is_held+0xb6/0x140 [ 29.610493] ? inet_create+0xf50/0xf50 [ 29.614350] ? selinux_socket_sendmsg+0x36/0x40 [ 29.618990] ? security_socket_sendmsg+0x89/0xb0 [ 29.623716] ? inet_create+0xf50/0xf50 [ 29.627572] sock_sendmsg+0xca/0x110 [ 29.631257] ___sys_sendmsg+0x767/0x8b0 [ 29.635207] ? copy_msghdr_from_user+0x590/0x590 [ 29.639942] ? lock_downgrade+0x980/0x980 [ 29.644081] ? __fget_light+0x2b2/0x3c0 [ 29.648029] ? fget_raw+0x20/0x20 [ 29.651459] ? __fd_install+0x288/0x740 [ 29.655410] ? get_unused_fd_flags+0x190/0x190 [ 29.659968] __sys_sendmsg+0xe5/0x210 [ 29.663738] ? __sys_sendmsg+0xe5/0x210 [ 29.667682] ? SyS_shutdown+0x290/0x290 [ 29.671630] ? SyS_futex+0x269/0x390 [ 29.675314] ? fd_install+0x4d/0x60 [ 29.678916] ? move_addr_to_kernel+0x60/0x60 [ 29.683295] ? __sys_sendmsg+0x210/0x210 [ 29.687327] SyS_sendmsg+0x2d/0x50 [ 29.690838] do_syscall_64+0x280/0x940 [ 29.694698] ? __do_page_fault+0xc90/0xc90 [ 29.698904] ? _raw_spin_unlock_irq+0x27/0x70 [ 29.703368] ? finish_task_switch+0x1c1/0x7e0 [ 29.707833] ? syscall_return_slowpath+0x550/0x550 [ 29.712732] ? syscall_return_slowpath+0x2ac/0x550 [ 29.717653] ? prepare_exit_to_usermode+0x350/0x350 [ 29.722638] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 29.727973] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.732789] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 29.737946] RIP: 0033:0x446c19 [ 29.741105] RSP: 002b:00007f8704755db8 EFLAGS: 00000293 ORIG_RAX: 000000000000002e [ 29.748781] RAX: ffffffffffffffda RBX: 00000000006e29e4 RCX: 0000000000446c19 [ 29.756021] RDX: 0000000020000000 RSI: 0000000020000140 RDI: 0000000000000006 [ 29.763263] RBP: 00000000006e29e0 R08: 0000000000000000 R09: 0000000000000000 [ 29.770506] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 [ 29.777748] R13: 00007fff855edb8f R14: 00007f87047569c0 R15: 0000000000000009 [ 29.784999] Code: 00 00 48 85 c0 49 89 c4 0f 84 fb 00 00 00 e8 8f 02 23 fc 41 80 3e 00 0f 85 5a 01 00 00 4c 8b bb e0 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 [ 29.804081] RIP: dccp_write_xmit+0x69/0x1d0 RSP: ffff8801af74f708 [ 29.810504] ---[ end trace 0ec14e60c6d2ce87 ]--- [ 29.815251] Kernel panic - not syncing: Fatal exception [ 29.820946] Dumping ftrace buffer: [ 29.824459] (ftrace buffer empty) [ 29.828140] Kernel Offset: disabled [ 29.831738] Rebooting in 86400 seconds..