[....] Starting enhanced syslogd: rsyslogd[ 15.568750] audit: type=1400 audit(1551897591.052:4): avc: denied { syslog } for pid=1921 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 '10.128.0.225' (ECDSA) to the list of known hosts. 2019/03/06 18:40:27 parsed 1 programs 2019/03/06 18:40:30 executed programs: 0 2019/03/06 18:40:37 executed programs: 12 syzkaller login: [ 65.343641] ------------[ cut here ]------------ [ 65.348441] WARNING: CPU: 0 PID: 2358 at kernel/signal.c:343 task_participate_group_stop+0x21f/0x2d0() [ 65.357968] Kernel panic - not syncing: panic_on_warn set ... [ 65.357968] [ 65.365317] CPU: 0 PID: 2358 Comm: 5 Not tainted 4.4.174+ #17 [ 65.371191] 0000000000000000 0b4621a0764850eb ffff8800b4667a10 ffffffff81aad1a1 [ 65.379218] 0000000000000000 ffffffff82835ee0 ffffffff8283bd40 0000000000000157 [ 65.387276] ffffffff810f7f3f ffff8800b4667af0 ffffffff813a48c2 0000000041b58ab3 [ 65.395408] Call Trace: [ 65.397987] [] dump_stack+0xc1/0x120 [ 65.403339] [] ? task_participate_group_stop+0x21f/0x2d0 [ 65.410443] [] panic+0x1b9/0x37b [ 65.415442] [] ? add_taint.cold+0x16/0x16 [ 65.421221] [] ? kasan_slab_free+0x11a/0x190 [ 65.427276] [] ? warn_slowpath_common.cold+0x5/0x20 [ 65.433938] [] warn_slowpath_common.cold+0x20/0x20 [ 65.440525] [] warn_slowpath_null+0x2a/0x30 [ 65.446490] [] task_participate_group_stop+0x21f/0x2d0 [ 65.453402] [] do_signal_stop+0x3a2/0x810 [ 65.459184] [] get_signal+0x5f9/0x1570 [ 65.464708] [] do_signal+0x9c/0x1840 [ 65.470060] [] ? put_files_struct+0x206/0x270 [ 65.476266] [] ? rcu_read_lock_sched_held+0x10b/0x130 [ 65.483178] [] ? setup_sigcontext+0x780/0x780 [ 65.489313] [] ? put_files_struct+0x29/0x270 [ 65.495356] [] ? do_execveat_common.isra.0+0x242/0x1e90 [ 65.502361] [] ? do_execveat_common.isra.0+0xf14/0x1e90 [ 65.509360] [] ? prepare_bprm_creds+0x120/0x120 [ 65.515672] [] ? exit_to_usermode_loop+0xf2/0x170 [ 65.522149] [] exit_to_usermode_loop+0x127/0x170 [ 65.528540] [] do_fast_syscall_32+0x7a9/0xa90 [ 65.534761] [] sysenter_flags_fixed+0xd/0x1a [ 65.541317] Kernel Offset: disabled [ 65.545131] Rebooting in 86400 seconds..