[ 14.775421] audit: type=1400 audit(1519098783.682:5): avc: denied { syslog } for pid=3910 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.067295] audit: type=1400 audit(1519098786.974:6): avc: denied { map } for pid=4058 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 '10.128.15.205' (ECDSA) to the list of known hosts. [ 24.337183] audit: type=1400 audit(1519098793.244:7): avc: denied { map } for pid=4072 comm="syz-execprog" path="/root/syz-execprog" dev="sda1" ino=16479 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 2018/02/20 03:53:13 parsed 1 programs 2018/02/20 03:53:13 executed programs: 0 [ 24.595723] audit: type=1400 audit(1519098793.502:8): avc: denied { map } for pid=4072 comm="syz-execprog" path="/root/syzkaller-shm066137361" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 [ 24.608578] IPVS: ftp: loaded support on port[0] = 21 [ 24.822436] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 25.144323] WARNING: CPU: 1 PID: 4207 at net/ipv4/tcp_input.c:2199 tcp_mark_head_lost+0x770/0x8f0 [ 25.153384] Kernel panic - not syncing: panic_on_warn set ... [ 25.153384] [ 25.160717] CPU: 1 PID: 4207 Comm: syz-executor0 Not tainted 4.16.0-rc1+ #232 [ 25.167963] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.177287] Call Trace: [ 25.179857] dump_stack+0x194/0x257 [ 25.183468] ? arch_local_irq_restore+0x53/0x53 [ 25.188112] ? vsnprintf+0x1ed/0x1900 [ 25.191889] panic+0x1e4/0x41c [ 25.195056] ? refcount_error_report+0x214/0x214 [ 25.199782] ? show_regs_print_info+0x18/0x18 [ 25.204255] ? __warn+0x1c1/0x200 [ 25.207682] ? tcp_mark_head_lost+0x770/0x8f0 [ 25.212146] __warn+0x1dc/0x200 [ 25.215399] ? tcp_mark_head_lost+0x770/0x8f0 [ 25.219867] report_bug+0x211/0x2d0 [ 25.223471] fixup_bug.part.11+0x37/0x80 [ 25.227512] do_error_trap+0x2d7/0x3e0 [ 25.231377] ? tcp_sacktag_one+0x16b/0x910 [ 25.235585] ? math_error+0x400/0x400 [ 25.239360] ? tcp_skb_mark_lost_uncond_verify+0x16b/0x230 [ 25.244955] ? tcp_rack_detect_loss+0x2a2/0x8d0 [ 25.249598] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.254418] do_invalid_op+0x1b/0x20 [ 25.258102] invalid_op+0x22/0x40 [ 25.261524] RIP: 0010:tcp_mark_head_lost+0x770/0x8f0 [ 25.266595] RSP: 0018:ffff8801c06f7540 EFLAGS: 00010293 [ 25.271935] RAX: ffff8801be45c300 RBX: 0000000000000004 RCX: ffffffff849be010 [ 25.279179] RDX: 0000000000000000 RSI: ffff8801bf3d3d1c RDI: ffff8801bf3d3db4 [ 25.286420] RBP: ffff8801c06f75c0 R08: ffff8801bf3d3c88 R09: ffff8801c06f7930 [ 25.293660] R10: 0000000000000003 R11: 0000000000000000 R12: ffff8801bf3d3500 [ 25.300904] R13: dffffc0000000000 R14: ffff8801c32725f5 R15: 0000000000000000 [ 25.308157] ? tcp_mark_head_lost+0x770/0x8f0 [ 25.312641] tcp_fastretrans_alert+0xe85/0x2260 [ 25.317292] tcp_ack+0x2b5c/0x51a0 [ 25.320830] ? tcp_fastretrans_alert+0x2260/0x2260 [ 25.325736] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 25.330919] ? tcp_parse_options+0x188/0xa10 [ 25.335314] ? sched_clock+0x31/0x40 [ 25.339000] ? tcp_transmit_skb+0x37d0/0x38b0 [ 25.343476] tcp_rcv_state_process+0xc84/0x4800 [ 25.348117] ? rt_cpu_seq_show+0x2c0/0x2c0 [ 25.352323] ? check_noncircular+0x20/0x20 [ 25.356533] ? tcp_finish_connect+0x420/0x420 [ 25.360998] ? print_irqtrace_events+0x270/0x270 [ 25.365731] ? find_held_lock+0x35/0x1d0 [ 25.369769] ? __release_sock+0xca/0x360 [ 25.373805] ? lock_downgrade+0x980/0x980 [ 25.377922] ? __lock_is_held+0xb6/0x140 [ 25.381958] ? mark_held_locks+0xaf/0x100 [ 25.386085] ? __local_bh_enable_ip+0x121/0x230 [ 25.390731] tcp_v4_do_rcv+0x55c/0x7d0 [ 25.395195] ? tcp_v4_do_rcv+0x55c/0x7d0 [ 25.399229] __release_sock+0x124/0x360 [ 25.403182] release_sock+0xa4/0x2a0 [ 25.406870] ? __release_sock+0x360/0x360 [ 25.410987] ? lock_sock_nested+0x91/0x110 [ 25.415194] ? trace_hardirqs_on+0xd/0x10 [ 25.419314] ? __local_bh_enable_ip+0x121/0x230 [ 25.423953] ? tcp_set_state+0x830/0x830 [ 25.427985] ? tcp_set_state+0x830/0x830 [ 25.432033] inet_shutdown+0x1a8/0x350 [ 25.435899] SyS_shutdown+0x137/0x290 [ 25.439681] ? SyS_getsockopt+0x340/0x340 [ 25.443821] ? vfs_writev+0x340/0x340 [ 25.447592] ? mm_fault_error+0x2c0/0x2c0 [ 25.451711] ? move_addr_to_kernel+0x60/0x60 [ 25.456100] ? do_syscall_64+0xb7/0x940 [ 25.460061] ? SyS_getsockopt+0x340/0x340 [ 25.464180] do_syscall_64+0x282/0x940 [ 25.468048] ? __do_page_fault+0xc90/0xc90 [ 25.472253] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.476980] ? syscall_return_slowpath+0x550/0x550 [ 25.481911] ? syscall_return_slowpath+0x2ac/0x550 [ 25.486821] ? prepare_exit_to_usermode+0x350/0x350 [ 25.491814] ? entry_SYSCALL_64_after_hwframe+0x36/0x9b [ 25.497151] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.501977] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 25.507139] RIP: 0033:0x453da9 [ 25.510300] RSP: 002b:00007ffd3ce84518 EFLAGS: 00000246 ORIG_RAX: 0000000000000030 [ 25.517978] RAX: ffffffffffffffda RBX: 0000000002802914 RCX: 0000000000453da9 [ 25.525218] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000003 [ 25.532458] RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 [ 25.539712] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 25.546957] R13: 00000000000005bb R14: 00000000006f8a28 R15: 0000000000000009 [ 25.554810] Dumping ftrace buffer: [ 25.558448] (ftrace buffer empty) [ 25.562133] Kernel Offset: disabled [ 25.565737] Rebooting in 86400 seconds..