[....] Starting enhanced syslogd: rsyslogd[ 14.206618] audit: type=1400 audit(1567762141.593:4): avc: denied { syslog } for pid=1925 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 '10.128.0.154' (ECDSA) to the list of known hosts. 2019/09/06 09:29:13 parsed 1 programs 2019/09/06 09:29:15 executed programs: 0 syzkaller login: [ 28.921447] ------------[ cut here ]------------ [ 28.926282] WARNING: CPU: 0 PID: 2301 at net/xfrm/xfrm_policy.c:770 xfrm_policy_insert+0x600/0xf20() [ 28.935780] Kernel panic - not syncing: panic_on_warn set ... [ 28.935780] [ 28.943144] CPU: 0 PID: 2301 Comm: syz-executor.0 Not tainted 4.4.174+ #4 [ 28.950049] 0000000000000000 2c7ee2bf2b61fa26 ffff8801d22df428 ffffffff81aad1a1 [ 28.958098] 0000000000000000 ffffffff82835ee0 ffffffff82a9b140 0000000000000302 [ 28.966118] ffffffff82548f00 ffff8801d22df508 ffffffff813a48c2 0000000041b58ab3 [ 28.974124] Call Trace: [ 28.976698] [] dump_stack+0xc1/0x120 [ 28.982040] [] ? xfrm_policy_insert+0x600/0xf20 [ 28.988336] [] panic+0x1b9/0x37b [ 28.993335] [] ? add_taint.cold+0x16/0x16 [ 28.999109] [] ? __debug_object_init+0x193/0x880 [ 29.005501] [] ? warn_slowpath_common.cold+0x5/0x20 [ 29.012144] [] warn_slowpath_common.cold+0x20/0x20 [ 29.018700] [] warn_slowpath_null+0x2a/0x30 [ 29.024650] [] xfrm_policy_insert+0x600/0xf20 [ 29.030774] [] xfrm_add_policy+0x23c/0x4d0 [ 29.036634] [] ? xfrm_add_acquire+0x9c0/0x9c0 [ 29.042774] [] ? validate_nla+0x1c0/0x4d0 [ 29.048549] [] ? nla_parse+0x15f/0x1c0 [ 29.054064] [] ? xfrm_add_acquire+0x9c0/0x9c0 [ 29.060200] [] xfrm_user_rcv_msg+0x37c/0x630 [ 29.066235] [] ? xfrm_dump_sa_done+0xa0/0xa0 [ 29.072269] [] ? trace_hardirqs_on+0x10/0x10 [ 29.078304] [] ? __lock_acquire+0xa4f/0x4f50 [ 29.084338] [] ? mutex_trylock+0x500/0x500 [ 29.090198] [] netlink_rcv_skb+0xd4/0x2e0 [ 29.095972] [] ? xfrm_dump_sa_done+0xa0/0xa0 [ 29.102009] [] xfrm_netlink_rcv+0x70/0x90 [ 29.107869] [] netlink_unicast+0x4d7/0x700 [ 29.113729] [] ? netlink_sendskb+0x60/0x60 [ 29.119599] [] netlink_sendmsg+0x6b6/0xc80 [ 29.125469] [] ? nlmsg_notify+0x170/0x170 [ 29.131244] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 29.137715] [] ? security_socket_sendmsg+0x8f/0xc0 [ 29.144270] [] ? nlmsg_notify+0x170/0x170 [ 29.150047] [] sock_sendmsg+0xbe/0x110 [ 29.155575] [] ___sys_sendmsg+0x769/0x890 [ 29.161357] [] ? copy_msghdr_from_user+0x550/0x550 [ 29.167926] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 29.174657] [] ? check_preemption_disabled+0x3c/0x200 [ 29.181484] [] ? check_preemption_disabled+0x3c/0x200 [ 29.188301] [] ? __fget+0x13b/0x370 [ 29.193554] [] ? __fget+0x162/0x370 [ 29.198805] [] ? __fget+0x47/0x370 [ 29.203972] [] ? __fget_light+0xa3/0x1f0 [ 29.209659] [] ? __fdget+0x1b/0x20 [ 29.214834] [] __sys_sendmsg+0xc5/0x160 [ 29.220436] [] ? SyS_shutdown+0x1a0/0x1a0 [ 29.226212] [] ? SyS_clock_gettime+0x118/0x1e0 [ 29.232419] [] ? SyS_clock_settime+0x220/0x220 [ 29.238644] [] SyS_sendmsg+0x2d/0x50 [ 29.243997] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 29.251327] Kernel Offset: disabled [ 29.254972] Rebooting in 86400 seconds..