[....] Starting enhanced syslogd: rsyslogd[ 12.608974] audit: type=1400 audit(1566419658.614:4): 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 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 '10.128.0.33' (ECDSA) to the list of known hosts. 2019/08/21 20:35:01 parsed 1 programs 2019/08/21 20:35:04 executed programs: 0 syzkaller login: [ 59.280398] ------------[ cut here ]------------ [ 59.285192] WARNING: CPU: 1 PID: 2319 at net/ipv4/tcp.c:2131 tcp_close+0xc30/0xfa0() [ 59.293181] Kernel panic - not syncing: panic_on_warn set ... [ 59.293181] [ 59.300531] CPU: 1 PID: 2319 Comm: syz-executor.0 Not tainted 4.4.174+ #17 [ 59.307528] 0000000000000000 a7b3f1e53c5bf470 ffff8801d2287b60 ffffffff81aad1a1 [ 59.315563] 0000000000000000 ffffffff82835ee0 ffffffff82a85940 0000000000000853 [ 59.323604] ffffffff823fe910 ffff8801d2287c40 ffffffff813a48c2 0000000041b58ab3 [ 59.331727] Call Trace: [ 59.334302] [] dump_stack+0xc1/0x120 [ 59.339651] [] ? tcp_close+0xc30/0xfa0 [ 59.345195] [] panic+0x1b9/0x37b [ 59.350195] [] ? add_taint.cold+0x16/0x16 [ 59.355979] [] ? trace_hardirqs_on_caller+0x385/0x5a0 [ 59.362801] [] ? warn_slowpath_common.cold+0x5/0x20 [ 59.369453] [] warn_slowpath_common.cold+0x20/0x20 [ 59.376103] [] warn_slowpath_null+0x2a/0x30 [ 59.382058] [] tcp_close+0xc30/0xfa0 [ 59.387408] [] ? ip_mc_drop_socket+0x1d6/0x230 [ 59.393626] [] inet_release+0xff/0x1d0 [ 59.399152] [] inet6_release+0x53/0x80 [ 59.404672] [] __sock_release+0xd5/0x260 [ 59.410369] [] ? __sock_release+0x260/0x260 [ 59.416327] [] sock_close+0x1b/0x30 [ 59.421589] [] __fput+0x246/0x710 [ 59.426677] [] ____fput+0x16/0x20 [ 59.431763] [] task_work_run+0x202/0x2b0 [ 59.437461] [] exit_to_usermode_loop+0x14a/0x170 [ 59.443852] [] do_fast_syscall_32+0x7a9/0xa90 [ 59.449987] [] sysenter_flags_fixed+0xd/0x1a [ 59.456390] Kernel Offset: disabled [ 59.460019] Rebooting in 86400 seconds..