[....] Starting enhanced syslogd: rsyslogd[ 13.344174] audit: type=1400 audit(1536515542.426:4): avc: denied { syslog } for pid=1919 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[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.22' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.593255] ------------[ cut here ]------------ [ 42.598114] WARNING: CPU: 1 PID: 2077 at net/packet/af_packet.c:4163 packet_set_ring+0x12f5/0x1820() [ 42.607397] Tx-ring is not supported. [ 42.611240] Kernel panic - not syncing: panic_on_warn set ... [ 42.611240] [ 42.618649] CPU: 1 PID: 2077 Comm: syz-executor774 Not tainted 4.4.154+ #97 [ 42.625729] 0000000000000000 f06795b83c6c2e48 ffff8800b6b67938 ffffffff81a54fed [ 42.633741] ffffffff82835440 ffff8801d5810000 ffffffff82aa7600 0000000000000009 [ 42.641719] 0000000000001043 ffff8800b6b679f8 ffffffff8138a884 0000000041b58ab3 [ 42.649719] Call Trace: [ 42.652287] [] dump_stack+0xc1/0x124 [ 42.657682] [] panic+0x19e/0x359 [ 42.662681] [] ? add_taint.cold.4+0x16/0x16 [ 42.668628] [] ? warn_slowpath_common.cold.6+0x5/0x20 [ 42.675473] [] warn_slowpath_common.cold.6+0x20/0x20 [ 42.682203] [] ? packet_set_ring+0x12f5/0x1820 [ 42.688415] [] warn_slowpath_fmt+0xbf/0x100 [ 42.694361] [] ? warn_slowpath_common+0x120/0x120 [ 42.700826] [] ? trace_hardirqs_on+0x10/0x10 [ 42.706921] [] ? __lock_acquire+0xa86/0x5ba0 [ 42.713015] [] packet_set_ring+0x12f5/0x1820 [ 42.719066] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 42.725799] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 42.732525] [] ? tpacket_destruct_skb+0x520/0x520 [ 42.738993] [] ? check_stack_object+0x110/0x150 [ 42.745282] [] ? __check_object_size+0x217/0x327 [ 42.751664] [] packet_setsockopt+0x5cc/0x22c0 [ 42.757784] [] ? check_preemption_disabled+0x3b/0x170 [ 42.764595] [] ? packet_release+0x9f0/0x9f0 [ 42.770541] [] ? sock_has_perm+0x2a1/0x3f0 [ 42.776521] [] ? sock_has_perm+0x9f/0x3f0 [ 42.782294] [] ? selinux_msg_queue_alloc_security+0x2e0/0x2e0 [ 42.789881] [] ? handle_mm_fault+0x49a/0x2f30 [ 42.796008] [] ? selinux_socket_setsockopt+0x3f/0x50 [ 42.802747] [] SyS_setsockopt+0x166/0x260 [ 42.808519] [] ? __do_page_fault+0x2b6/0x7e0 [ 42.814563] [] ? SyS_recv+0x40/0x40 [ 42.819834] [] ? retint_user+0x18/0x3c [ 42.825359] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 42.831833] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 42.838757] Dumping ftrace buffer: [ 42.842305] (ftrace buffer empty) [ 42.845992] Kernel Offset: disabled [ 42.849610] Rebooting in 86400 seconds..