[....] Starting enhanced syslogd: rsyslogd[ 16.446439] audit: type=1400 audit(1561630773.438:4): avc: denied { syslog } for pid=1920 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 '10.128.0.251' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 59.496757] ------------[ cut here ]------------ [ 59.501583] WARNING: CPU: 0 PID: 2090 at net/packet/af_packet.c:4167 packet_set_ring+0x13f1/0x1940() [ 59.511031] Tx-ring is not supported. [ 59.515558] Kernel panic - not syncing: panic_on_warn set ... [ 59.515558] [ 59.523058] CPU: 0 PID: 2090 Comm: syz-executor507 Not tainted 4.4.174+ #17 [ 59.530499] 0000000000000000 fe7dba4f521fdaf9 ffff8801d40f7908 ffffffff81aad1a1 [ 59.538517] ffff8801d40f7a58 ffffffff82835ee0 ffffffff82ab2b80 0000000000001047 [ 59.547071] ffffffff826d3941 ffff8801d40f79e8 ffffffff813a48c2 0000000041b58ab3 [ 59.555256] Call Trace: [ 59.557936] [] dump_stack+0xc1/0x120 [ 59.563291] [] ? packet_set_ring+0x13f1/0x1940 [ 59.569622] [] panic+0x1b9/0x37b [ 59.574744] [] ? add_taint.cold+0x16/0x16 [ 59.580536] [] ? vprintk_emit+0x248/0x820 [ 59.586326] [] ? warn_slowpath_common.cold+0x5/0x20 [ 59.592972] [] warn_slowpath_common.cold+0x20/0x20 [ 59.599538] [] warn_slowpath_fmt+0xbf/0x100 [ 59.605501] [] ? warn_slowpath_common+0x120/0x120 [ 59.611983] [] ? trace_hardirqs_on+0x10/0x10 [ 59.618035] [] packet_set_ring+0x13f1/0x1940 [ 59.624092] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 59.630977] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 59.637723] [] ? tpacket_destruct_skb+0x510/0x510 [ 59.644219] [] ? check_stack_object+0x114/0x160 [ 59.650887] [] ? __check_object_size+0x222/0x332 [ 59.657287] [] packet_setsockopt+0x2af/0x26c0 [ 59.663425] [] ? sock_has_perm+0x2a8/0x400 [ 59.669441] [] ? sock_has_perm+0xa6/0x400 [ 59.675350] [] ? packet_release+0xba0/0xba0 [ 59.681313] [] ? check_preemption_disabled+0x3c/0x200 [ 59.688149] [] ? check_preemption_disabled+0x3c/0x200 [ 59.694982] [] ? __fget+0x162/0x370 [ 59.700257] [] ? __fget+0x47/0x370 [ 59.705473] [] ? selinux_socket_setsockopt+0x3f/0x50 [ 59.712306] [] ? security_socket_setsockopt+0x8f/0xc0 [ 59.719138] [] compat_SyS_setsockopt+0x253/0x720 [ 59.725588] [] ? scm_detach_fds_compat+0x3b0/0x3b0 [ 59.732225] [] ? __do_page_fault+0x2b3/0x7f0 [ 59.738297] [] ? do_fast_syscall_32+0xd6/0xa90 [ 59.744512] [] ? scm_detach_fds_compat+0x3b0/0x3b0 [ 59.751203] [] do_fast_syscall_32+0x32d/0xa90 [ 59.757405] [] sysenter_flags_fixed+0xd/0x1a [ 59.763802] Kernel Offset: disabled [ 59.777903] Rebooting in 86400 seconds..