Author: glebius
Date: Tue May 17 22:28:53 2016
New Revision: 300090
URL: https://svnweb.freebsd.org/changeset/base/300090
Log:
Validate that user supplied control message length is not negative.
Submitted by: C Turt <cturt hardenedbsd.org>
Security: SA-16:19
Security: CVE-2016-1887
Modified:
head/sys/kern/uipc_syscalls.c
Modified: head/sys/kern/uipc_syscalls.c
==============================================================================
--- head/sys/kern/uipc_syscalls.c Tue May 17 22:28:42 2016
(r300089)
+++ head/sys/kern/uipc_syscalls.c Tue May 17 22:28:53 2016
(r300090)
@@ -1699,6 +1699,9 @@ sockargs(mp, buf, buflen, type)
struct mbuf *m;
int error;
+ if (buflen < 0)
+ return (EINVAL);
+
if (buflen > MLEN) {
#ifdef COMPAT_OLDSOCK
if (type == MT_SONAME && buflen <= 112)
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