[....] Starting enhanced syslogd: rsyslogd[ 14.601251] audit: type=1400 audit(1561248833.583:4): 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 '10.128.0.159' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 58.085718] ------------[ cut here ]------------ [ 58.090682] WARNING: CPU: 1 PID: 2091 at net/packet/af_packet.c:4167 packet_set_ring+0x13f1/0x1940() [ 58.100648] Tx-ring is not supported. [ 58.104665] Kernel panic - not syncing: panic_on_warn set ... [ 58.104665] [ 58.112095] CPU: 1 PID: 2091 Comm: syz-executor721 Not tainted 4.4.174+ #17 [ 58.119244] 0000000000000000 8eb01dd4fc0ee9be ffff8801d3cdf908 ffffffff81aad1a1 [ 58.127263] ffff8801d3cdfa58 ffffffff82835ee0 ffffffff82ab2b80 0000000000001047 [ 58.135442] ffffffff826d3941 ffff8801d3cdf9e8 ffffffff813a48c2 0000000041b58ab3 [ 58.143476] Call Trace: [ 58.146059] [] dump_stack+0xc1/0x120 [ 58.151431] [] ? packet_set_ring+0x13f1/0x1940 [ 58.157722] [] panic+0x1b9/0x37b [ 58.162794] [] ? add_taint.cold+0x16/0x16 [ 58.168613] [] ? vprintk_emit+0x248/0x820 [ 58.174419] [] ? warn_slowpath_common.cold+0x5/0x20 [ 58.181106] [] warn_slowpath_common.cold+0x20/0x20 [ 58.187694] [] warn_slowpath_fmt+0xbf/0x100 [ 58.193724] [] ? warn_slowpath_common+0x120/0x120 [ 58.200231] [] ? trace_hardirqs_on+0x10/0x10 [ 58.206305] [] packet_set_ring+0x13f1/0x1940 [ 58.212377] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 58.219145] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 58.225910] [] ? tpacket_destruct_skb+0x510/0x510 [ 58.232432] [] ? check_stack_object+0x114/0x160 [ 58.238835] [] ? __check_object_size+0x222/0x332 [ 58.245258] [] packet_setsockopt+0x2af/0x26c0 [ 58.251513] [] ? sock_has_perm+0x2a8/0x400 [ 58.257401] [] ? sock_has_perm+0xa6/0x400 [ 58.263205] [] ? packet_release+0xba0/0xba0 [ 58.269368] [] ? check_preemption_disabled+0x3c/0x200 [ 58.276396] [] ? check_preemption_disabled+0x3c/0x200 [ 58.283301] [] ? __fget+0x162/0x370 [ 58.288859] [] ? __fget+0x47/0x370 [ 58.294061] [] ? selinux_socket_setsockopt+0x3f/0x50 [ 58.301045] [] ? security_socket_setsockopt+0x8f/0xc0 [ 58.308008] [] compat_SyS_setsockopt+0x253/0x720 [ 58.314528] [] ? scm_detach_fds_compat+0x3b0/0x3b0 [ 58.321116] [] ? __do_page_fault+0x2b3/0x7f0 [ 58.327189] [] ? do_fast_syscall_32+0xd6/0xa90 [ 58.333587] [] ? scm_detach_fds_compat+0x3b0/0x3b0 [ 58.340197] [] do_fast_syscall_32+0x32d/0xa90 [ 58.346393] [] sysenter_flags_fixed+0xd/0x1a [ 58.352904] Kernel Offset: disabled [ 58.356562] Rebooting in 86400 seconds..