[....] Starting enhanced syslogd: rsyslogd[ 13.302947] audit: type=1400 audit(1566800745.170:4): 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 '10.128.0.124' (ECDSA) to the list of known hosts. 2019/08/26 06:27:10 parsed 1 programs 2019/08/26 06:27:12 executed programs: 0 2019/08/26 06:27:17 executed programs: 220 2019/08/26 06:27:22 executed programs: 498 syzkaller login: INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes 2019/08/26 06:27:27 executed programs: 798 2019/08/26 06:27:32 executed programs: 1111 2019/08/26 06:27:37 executed programs: 1354 2019/08/26 06:27:42 executed programs: 1660 2019/08/26 06:27:47 executed programs: 1919 2019/08/26 06:27:52 executed programs: 2165 [ 142.328217] ------------[ cut here ]------------ [ 142.333032] WARNING: CPU: 1 PID: 11336 at net/ipv4/tcp.c:2131 tcp_close+0xc30/0xfa0() [ 142.341109] Kernel panic - not syncing: panic_on_warn set ... [ 142.341109] [ 142.348458] CPU: 1 PID: 11336 Comm: syz-executor.0 Not tainted 4.4.174+ #4 [ 142.355456] 0000000000000000 1a6f81d2123b08cb ffff8801d1cd78f0 ffffffff81aad1a1 [ 142.363491] 0000000000000000 ffffffff82835ee0 ffffffff82a85940 0000000000000853 [ 142.371529] ffffffff823fe910 ffff8801d1cd79d0 ffffffff813a48c2 0000000041b58ab3 [ 142.379595] Call Trace: [ 142.382177] [] dump_stack+0xc1/0x120 [ 142.387527] [] ? tcp_close+0xc30/0xfa0 [ 142.393047] [] panic+0x1b9/0x37b [ 142.398045] [] ? add_taint.cold+0x16/0x16 [ 142.403826] [] ? trace_hardirqs_on_caller+0x385/0x5a0 [ 142.410648] [] ? warn_slowpath_common.cold+0x5/0x20 [ 142.417824] [] warn_slowpath_common.cold+0x20/0x20 [ 142.424384] [] warn_slowpath_null+0x2a/0x30 [ 142.430343] [] tcp_close+0xc30/0xfa0 [ 142.435690] [] ? ip_mc_drop_socket+0x1d6/0x230 [ 142.441910] [] inet_release+0xff/0x1d0 [ 142.447433] [] inet6_release+0x53/0x80 [ 142.452955] [] __sock_release+0xd5/0x260 [ 142.458734] [] ? __sock_release+0x260/0x260 [ 142.464686] [] sock_close+0x1b/0x30 [ 142.469947] [] __fput+0x246/0x710 [ 142.475031] [] ____fput+0x16/0x20 [ 142.480118] [] task_work_run+0x202/0x2b0 [ 142.485814] [] get_signal+0x1310/0x1570 [ 142.491421] [] do_signal+0x9c/0x1840 [ 142.496771] [] ? trace_hardirqs_on+0x10/0x10 [ 142.502814] [] ? setup_sigcontext+0x780/0x780 [ 142.509810] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 142.516854] [] ? poll_select_copy_remaining+0x254/0x370 [ 142.523854] [] ? poll_schedule_timeout+0x1c0/0x1c0 [ 142.530417] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 142.537158] [] ? SyS_ppoll+0x2e3/0x3e0 [ 142.542677] [] ? SyS_poll+0x3a0/0x3a0 [ 142.548116] [] ? exit_to_usermode_loop+0xf2/0x170 [ 142.554594] [] exit_to_usermode_loop+0x127/0x170 [ 142.560986] [] syscall_return_slowpath+0x25b/0x2e0 [ 142.567551] [] int_ret_from_sys_call+0x25/0xa3 [ 142.574294] Kernel Offset: disabled [ 142.577929] Rebooting in 86400 seconds..