[....] Starting enhanced syslogd: rsyslogd[ 13.752972] audit: type=1400 audit(1568477858.333:4): avc: denied { syslog } for pid=1918 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 '10.128.0.20' (ECDSA) to the list of known hosts. 2019/09/14 16:17:59 parsed 1 programs 2019/09/14 16:18:00 executed programs: 0 2019/09/14 16:18:05 executed programs: 54 2019/09/14 16:18:11 executed programs: 117 syzkaller login: [ 47.450808] ------------[ cut here ]------------ [ 47.456939] WARNING: CPU: 1 PID: 2768 at net/ipv4/tcp.c:2131 tcp_close+0xc30/0xfa0() [ 47.465013] Kernel panic - not syncing: panic_on_warn set ... [ 47.465013] [ 47.472367] CPU: 1 PID: 2768 Comm: syz-executor.0 Not tainted 4.4.174+ #17 [ 47.479362] 0000000000000000 98330e43a159e76c ffff8801d0447b60 ffffffff81aad1a1 [ 47.487395] 0000000000000000 ffffffff82835ee0 ffffffff82a85940 0000000000000853 [ 47.495428] ffffffff823fe910 ffff8801d0447c40 ffffffff813a48c2 0000000041b58ab3 [ 47.503461] Call Trace: [ 47.506043] [] dump_stack+0xc1/0x120 [ 47.511391] [] ? tcp_close+0xc30/0xfa0 [ 47.516910] [] panic+0x1b9/0x37b [ 47.521909] [] ? add_taint.cold+0x16/0x16 [ 47.527693] [] ? trace_hardirqs_on_caller+0x385/0x5a0 [ 47.534518] [] ? warn_slowpath_common.cold+0x5/0x20 [ 47.541168] [] warn_slowpath_common.cold+0x20/0x20 [ 47.547732] [] warn_slowpath_null+0x2a/0x30 [ 47.553686] [] tcp_close+0xc30/0xfa0 [ 47.559038] [] ? ip_mc_drop_socket+0x1d6/0x230 [ 47.566037] [] inet_release+0xff/0x1d0 [ 47.571557] [] inet6_release+0x53/0x80 [ 47.577082] [] __sock_release+0xd5/0x260 [ 47.582779] [] ? __sock_release+0x260/0x260 [ 47.588731] [] sock_close+0x1b/0x30 [ 47.593993] [] __fput+0x246/0x710 [ 47.599078] [] ____fput+0x16/0x20 [ 47.604169] [] task_work_run+0x202/0x2b0 [ 47.609865] [] exit_to_usermode_loop+0x14a/0x170 [ 47.616255] [] do_fast_syscall_32+0x7a9/0xa90 [ 47.622389] [] sysenter_flags_fixed+0xd/0x1a [ 47.629139] Kernel Offset: disabled [ 47.632779] Rebooting in 86400 seconds..