[....] Starting enhanced syslogd: rsyslogd[ 12.925841] audit: type=1400 audit(1536512798.074:4): avc: denied { syslog } for pid=1921 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] 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 '10.128.0.25' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 24.354816] ------------[ cut here ]------------ [ 24.359819] WARNING: CPU: 1 PID: 2073 at net/packet/af_packet.c:4163 packet_set_ring+0x12f5/0x1820() [ 24.369101] Tx-ring is not supported. [ 24.372958] Kernel panic - not syncing: panic_on_warn set ... [ 24.372958] [ 24.380299] CPU: 1 PID: 2073 Comm: syz-executor010 Not tainted 4.4.154+ #33 [ 24.387374] 0000000000000000 4c25ca3a8ff2ee00 ffff8800b64278c8 ffffffff81a54fed [ 24.395372] ffffffff82835440 ffff8801d4ca0000 ffffffff82aa7600 0000000000000009 [ 24.403352] 0000000000001043 ffff8800b6427988 ffffffff8138a884 0000000041b58ab3 [ 24.411333] Call Trace: [ 24.413896] [] dump_stack+0xc1/0x124 [ 24.419239] [] panic+0x19e/0x359 [ 24.424247] [] ? add_taint.cold.4+0x16/0x16 [ 24.430195] [] ? warn_slowpath_common.cold.6+0x5/0x20 [ 24.437007] [] warn_slowpath_common.cold.6+0x20/0x20 [ 24.443737] [] ? packet_set_ring+0x12f5/0x1820 [ 24.449947] [] warn_slowpath_fmt+0xbf/0x100 [ 24.455891] [] ? warn_slowpath_common+0x120/0x120 [ 24.462359] [] ? trace_hardirqs_on+0x10/0x10 [ 24.468393] [] ? __lock_acquire+0xa86/0x5ba0 [ 24.474427] [] ? check_preemption_disabled+0x3b/0x170 [ 24.481246] [] packet_set_ring+0x12f5/0x1820 [ 24.487279] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 24.494004] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 24.500735] [] ? tpacket_destruct_skb+0x520/0x520 [ 24.507203] [] ? check_stack_object+0x110/0x150 [ 24.513496] [] ? __check_object_size+0x217/0x327 [ 24.519879] [] packet_setsockopt+0x5cc/0x22c0 [ 24.526000] [] ? check_preemption_disabled+0x3b/0x170 [ 24.532817] [] ? packet_release+0x9f0/0x9f0 [ 24.538767] [] ? sock_has_perm+0x2a1/0x3f0 [ 24.544624] [] ? sock_has_perm+0x9f/0x3f0 [ 24.550403] [] ? selinux_msg_queue_alloc_security+0x2e0/0x2e0 [ 24.557918] [] ? __fget+0x12f/0x3d0 [ 24.563184] [] ? __fget+0x156/0x3d0 [ 24.568456] [] ? __fget+0x47/0x3d0 [ 24.573623] [] ? selinux_socket_setsockopt+0x3f/0x50 [ 24.580360] [] ? security_socket_setsockopt+0x8f/0xc0 [ 24.587198] [] compat_SyS_setsockopt+0x261/0x6e0 [ 24.593581] [] ? scm_detach_fds_compat+0x3b0/0x3b0 [ 24.600159] [] ? __do_page_fault+0x2b6/0x7e0 [ 24.606195] [] ? do_fast_syscall_32+0xdb/0x8b0 [ 24.612400] [] ? scm_detach_fds_compat+0x3b0/0x3b0 [ 24.618953] [] do_fast_syscall_32+0x31e/0x8b0 [ 24.625070] [] sysenter_flags_fixed+0xd/0x1a [ 24.631529] Dumping ftrace buffer: [ 24.635122] (ftrace buffer empty) [ 24.638813] Kernel Offset: disabled [ 24.642431] Rebooting in 86400 seconds..