[....] Starting enhanced syslogd: rsyslogd[ 13.724511] audit: type=1400 audit(1568477656.590:4): avc: denied { syslog } for pid=1923 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 '10.128.0.98' (ECDSA) to the list of known hosts. 2019/09/14 16:14:29 parsed 1 programs 2019/09/14 16:14:31 executed programs: 0 syzkaller login: [ 32.856209] ------------[ cut here ]------------ [ 32.861045] WARNING: CPU: 1 PID: 2329 at net/ipv4/tcp.c:2131 tcp_close+0xc30/0xfa0() [ 32.869048] Kernel panic - not syncing: panic_on_warn set ... [ 32.869048] [ 32.876399] CPU: 1 PID: 2329 Comm: syz-executor.0 Not tainted 4.4.174+ #4 [ 32.883396] 0000000000000000 bd5ee52b396f2fc2 ffff8801d1e47bb0 ffffffff81aad1a1 [ 32.891441] 0000000000000000 ffffffff82835ee0 ffffffff82a85940 0000000000000853 [ 32.899481] ffffffff823fe910 ffff8801d1e47c90 ffffffff813a48c2 0000000041b58ab3 [ 32.907512] Call Trace: [ 32.910176] [] dump_stack+0xc1/0x120 [ 32.915528] [] ? tcp_close+0xc30/0xfa0 [ 32.921060] [] panic+0x1b9/0x37b [ 32.926237] [] ? add_taint.cold+0x16/0x16 [ 32.932024] [] ? trace_hardirqs_on_caller+0x385/0x5a0 [ 32.938851] [] ? warn_slowpath_common.cold+0x5/0x20 [ 32.945503] [] warn_slowpath_common.cold+0x20/0x20 [ 32.952077] [] warn_slowpath_null+0x2a/0x30 [ 32.958055] [] tcp_close+0xc30/0xfa0 [ 32.963413] [] ? ip_mc_drop_socket+0x1d6/0x230 [ 32.969650] [] inet_release+0xff/0x1d0 [ 32.975184] [] inet6_release+0x53/0x80 [ 32.980709] [] __sock_release+0xd5/0x260 [ 32.986414] [] ? __sock_release+0x260/0x260 [ 32.992386] [] sock_close+0x1b/0x30 [ 32.997653] [] __fput+0x246/0x710 [ 33.002740] [] ____fput+0x16/0x20 [ 33.007832] [] task_work_run+0x202/0x2b0 [ 33.013533] [] exit_to_usermode_loop+0x14a/0x170 [ 33.019951] [] syscall_return_slowpath+0x25b/0x2e0 [ 33.026520] [] int_ret_from_sys_call+0x25/0xa3 [ 33.033298] Kernel Offset: disabled [ 33.036939] Rebooting in 86400 seconds..