[....] Starting enhanced syslogd: rsyslogd[ 13.335010] audit: type=1400 audit(1571608425.304:4): 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 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 '10.128.0.49' (ECDSA) to the list of known hosts. 2019/10/20 21:53:56 parsed 1 programs 2019/10/20 21:53:58 executed programs: 0 syzkaller login: [ 27.604737] SELinux: unrecognized netlink message: protocol=4 nlmsg_type=112 sclass=netlink_tcpdiag_socket [ 27.820800] SELinux: unrecognized netlink message: protocol=4 nlmsg_type=112 sclass=netlink_tcpdiag_socket 2019/10/20 21:54:03 executed programs: 241 [ 33.503297] SELinux: unrecognized netlink message: protocol=4 nlmsg_type=112 sclass=netlink_tcpdiag_socket 2019/10/20 21:54:08 executed programs: 518 [ 36.510559] ------------[ cut here ]------------ [ 36.515378] WARNING: CPU: 1 PID: 4380 at net/ipv4/tcp.c:2131 tcp_close+0xc30/0xfa0() [ 36.523357] Kernel panic - not syncing: panic_on_warn set ... [ 36.523357] [ 36.530706] CPU: 1 PID: 4380 Comm: syz-executor.0 Not tainted 4.4.174+ #17 [ 36.537876] 0000000000000000 0b094b15e5af7d09 ffff8800b2c8fb60 ffffffff81aad1a1 [ 36.545906] 0000000000000000 ffffffff82835ee0 ffffffff82a85940 0000000000000853 [ 36.553959] ffffffff823fe910 ffff8800b2c8fc40 ffffffff813a48c2 0000000041b58ab3 [ 36.562007] Call Trace: [ 36.564582] [] dump_stack+0xc1/0x120 [ 36.569933] [] ? tcp_close+0xc30/0xfa0 [ 36.575453] [] panic+0x1b9/0x37b [ 36.580451] [] ? add_taint.cold+0x16/0x16 [ 36.586235] [] ? trace_hardirqs_on_caller+0x385/0x5a0 [ 36.593058] [] ? warn_slowpath_common.cold+0x5/0x20 [ 36.599707] [] warn_slowpath_common.cold+0x20/0x20 [ 36.606268] [] warn_slowpath_null+0x2a/0x30 [ 36.612223] [] tcp_close+0xc30/0xfa0 [ 36.617569] [] ? ip_mc_drop_socket+0x1d6/0x230 [ 36.623785] [] inet_release+0xff/0x1d0 [ 36.629307] [] inet6_release+0x53/0x80 [ 36.634830] [] __sock_release+0xd5/0x260 [ 36.640523] [] ? __sock_release+0x260/0x260 [ 36.646479] [] sock_close+0x1b/0x30 [ 36.651739] [] __fput+0x246/0x710 [ 36.656824] [] ____fput+0x16/0x20 [ 36.661914] [] task_work_run+0x202/0x2b0 [ 36.667622] [] exit_to_usermode_loop+0x14a/0x170 [ 36.674010] [] do_fast_syscall_32+0x7a9/0xa90 [ 36.680138] [] sysenter_flags_fixed+0xd/0x1a [ 36.686850] Kernel Offset: disabled [ 36.691001] Rebooting in 86400 seconds..