[ 14.391373] audit: type=1400 audit(1569515004.226:4): 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 [....] Starting enhanced syslogd: rsyslogd[?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 '10.128.1.36' (ECDSA) to the list of known hosts. 2019/09/26 16:23:59 parsed 1 programs 2019/09/26 16:24:00 executed programs: 0 syzkaller login: [ 53.604885] ------------[ cut here ]------------ [ 53.609722] WARNING: CPU: 1 PID: 2813 at net/xfrm/xfrm_policy.c:770 xfrm_policy_insert+0x600/0xf20() [ 53.619136] Kernel panic - not syncing: panic_on_warn set ... [ 53.619136] [ 53.626508] CPU: 1 PID: 2813 Comm: syz-executor.2 Not tainted 4.4.174+ #4 [ 53.633426] 0000000000000000 d1b4c5a8e0ff893c ffff8801cd447428 ffffffff81aad1a1 [ 53.641485] 0000000000000000 ffffffff82835ee0 ffffffff82a9b140 0000000000000302 [ 53.649538] ffffffff82548f00 ffff8801cd447508 ffffffff813a48c2 0000000041b58ab3 [ 53.657585] Call Trace: [ 53.660184] [] dump_stack+0xc1/0x120 [ 53.665546] [] ? xfrm_policy_insert+0x600/0xf20 [ 53.671867] [] panic+0x1b9/0x37b [ 53.676904] [] ? add_taint.cold+0x16/0x16 [ 53.682713] [] ? __debug_object_init+0x193/0x880 [ 53.689123] [] ? warn_slowpath_common.cold+0x5/0x20 [ 53.695794] [] warn_slowpath_common.cold+0x20/0x20 [ 53.702378] [] warn_slowpath_null+0x2a/0x30 [ 53.708354] [] xfrm_policy_insert+0x600/0xf20 [ 53.714510] [] xfrm_add_policy+0x23c/0x4d0 [ 53.720401] [] ? xfrm_add_acquire+0x9c0/0x9c0 [ 53.726550] [] ? validate_nla+0x1c0/0x4d0 [ 53.732350] [] ? nla_parse+0x15f/0x1c0 [ 53.741279] [] ? xfrm_add_acquire+0x9c0/0x9c0 [ 53.747441] [] xfrm_user_rcv_msg+0x37c/0x630 [ 53.753505] [] ? xfrm_dump_sa_done+0xa0/0xa0 [ 53.759568] [] ? trace_hardirqs_on+0x10/0x10 [ 53.765628] [] ? __lock_acquire+0xa4f/0x4f50 [ 53.771688] [] ? mutex_trylock+0x500/0x500 [ 53.777570] [] netlink_rcv_skb+0xd4/0x2e0 [ 53.783364] [] ? xfrm_dump_sa_done+0xa0/0xa0 [ 53.789420] [] xfrm_netlink_rcv+0x70/0x90 [ 53.795217] [] netlink_unicast+0x4d7/0x700 [ 53.801101] [] ? netlink_sendskb+0x60/0x60 [ 53.806989] [] netlink_sendmsg+0x6b6/0xc80 [ 53.812875] [] ? nlmsg_notify+0x170/0x170 [ 53.818680] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 53.825217] [] ? security_socket_sendmsg+0x8f/0xc0 [ 53.831796] [] ? nlmsg_notify+0x170/0x170 [ 53.837786] [] sock_sendmsg+0xbe/0x110 [ 53.843339] [] ___sys_sendmsg+0x769/0x890 [ 53.849157] [] ? copy_msghdr_from_user+0x550/0x550 [ 53.855756] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 53.862489] [] ? check_preemption_disabled+0x3c/0x200 [ 53.869566] [] ? check_preemption_disabled+0x3c/0x200 [ 53.876382] [] ? __fget+0x13b/0x370 [ 53.881667] [] ? __fget+0x162/0x370 [ 53.886922] [] ? __fget+0x47/0x370 [ 53.892088] [] ? __fget_light+0xa3/0x1f0 [ 53.897776] [] ? __fdget+0x1b/0x20 [ 53.902996] [] __sys_sendmsg+0xc5/0x160 [ 53.908596] [] ? SyS_shutdown+0x1a0/0x1a0 [ 53.914374] [] ? SyS_clock_gettime+0x118/0x1e0 [ 53.920582] [] ? SyS_clock_settime+0x220/0x220 [ 53.926790] [] SyS_sendmsg+0x2d/0x50 [ 53.932132] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 53.939289] Kernel Offset: disabled [ 53.942924] Rebooting in 86400 seconds..