Author: tuexen
Date: Sun Feb 10 08:28:56 2019
New Revision: 343951
URL: https://svnweb.freebsd.org/changeset/base/343951
Log:
Fix locking for IPPROTO_SCTP level SCTP_DEFAULT_PRINFO socket option.
This problem occurred when calling setsockopt() will invalid parameters.
This issue was found by running syzkaller.
MFC after: 3 days
Modified:
head/sys/netinet/sctp_usrreq.c
Modified: head/sys/netinet/sctp_usrreq.c
==============================================================================
--- head/sys/netinet/sctp_usrreq.c Sun Feb 10 08:14:06 2019
(r343950)
+++ head/sys/netinet/sctp_usrreq.c Sun Feb 10 08:28:56 2019
(r343951)
@@ -6209,6 +6209,9 @@ sctp_setopt(struct socket *so, int optname, void *optv
SCTP_FIND_STCB(inp, stcb, info->pr_assoc_id);
if (info->pr_policy > SCTP_PR_SCTP_MAX) {
+ if (stcb) {
+ SCTP_TCB_UNLOCK(stcb);
+ }
SCTP_LTRACE_ERR_RET(inp, NULL, NULL,
SCTP_FROM_SCTP_USRREQ, EINVAL);
error = EINVAL;
break;
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