[....] Starting enhanced syslogd: rsyslogd[ 10.725310] audit: type=1400 audit(1514758365.004:4): avc: denied { syslog } for pid=3173 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 '10.128.15.229' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 19.933537] ------------[ cut here ]------------ [ 19.934387] WARNING: CPU: 1 PID: 3323 at net/core/sock_reuseport.c:118 reuseport_add_sock+0x54b/0x650 [ 19.935605] socket already in reuseport group[ 19.936217] Kernel panic - not syncing: panic_on_warn set ... [ 19.936217] [ 19.937224] CPU: 1 PID: 3323 Comm: syzkaller575886 Not tainted 4.9.73-gf3f3457 #1 [ 19.938222] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.939460] ffff8801cc4ffad0 ffffffff81d922b9 ffffffff83a46d00 ffff8801cc4ffba8 [ 19.940604] ffffffff83eea200 ffffffff82f9ab3b 0000000000000009 ffff8801cc4ffb98 [ 19.941799] ffffffff8142d741 0000000041b58ab3 ffffffff84189000 ffffffff8142d585 [ 19.942940] Call Trace: [ 19.943317] [] dump_stack+0xc1/0x128 [ 19.944031] [] ? reuseport_add_sock+0x54b/0x650 [ 19.944885] [] panic+0x1bc/0x3a8 [ 19.945552] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 19.946632] [] ? vprintk_emit+0x3ad/0x750 [ 19.947400] [] ? __warn+0x1a9/0x1e0 [ 19.948118] [] ? reuseport_add_sock+0x54b/0x650 [ 19.948950] [] __warn+0x1c4/0x1e0 [ 19.949628] [] warn_slowpath_fmt+0xc4/0x110 [ 19.950434] [] ? __warn+0x1e0/0x1e0 [ 19.951150] [] ? reuseport_add_sock+0x52c/0x650 [ 19.952086] [] reuseport_add_sock+0x54b/0x650 [ 19.952898] [] ? trace_hardirqs_on+0xd/0x10 [ 19.953712] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 19.959999] [] ? _raw_read_unlock_bh+0x30/0x40 [ 19.966198] [] __inet_hash+0x5c0/0x900 [ 19.971701] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 19.978508] [] ? udp4_seq_show+0x500/0x500 [ 19.984359] [] inet_hash+0x68/0xa0 [ 19.989514] [] inet_csk_listen_start+0x2b9/0x360 [ 19.995885] [] inet_listen+0x12c/0x2e0 [ 20.001390] [] SyS_listen+0x188/0x260 [ 20.006807] [] ? SyS_bind+0x30/0x30 [ 20.012052] [] ? entry_SYSCALL_64_fastpath+0x5/0xc6 [ 20.018688] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 20.025493] [] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 20.032037] [] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 20.039148] Dumping ftrace buffer: [ 20.042685] (ftrace buffer empty) [ 20.046359] Kernel Offset: disabled [ 20.049959] Rebooting in 86400 seconds..