illumos, as used in OmniOS Community Edition before r151030y, allows a kernel crash via an application with multiple threads calling sendmsg concurrently over a single socket, because uts/common/inet/ip/ip_attr.c mishandles conn_ixa dereferences.Referenceshttps://omniosce.org/article/030y-028ay-022dw.htmlhttps://www.illumos.org/issues/11556
