Author: cem
Date: Wed May 11 22:33:20 2016
New Revision: 299491
URL: https://svnweb.freebsd.org/changeset/base/299491
Log:
route6d(8): Fix potential double-free
In the case that the subsequent sysctl(3) call failed, 'buf' could be
free(3)ed
repeatedly. It isn't clear to me that that case is possible, but be clear and
do the right thing in case it is.
Reported by: Coverity
CID: 272537
Sponsored by: EMC / Isilon Storage Division
Modified:
head/usr.sbin/route6d/route6d.c
Modified: head/usr.sbin/route6d/route6d.c
==============================================================================
--- head/usr.sbin/route6d/route6d.c Wed May 11 22:25:14 2016
(r299490)
+++ head/usr.sbin/route6d/route6d.c Wed May 11 22:33:20 2016
(r299491)
@@ -2598,8 +2598,10 @@ krtread(int again)
sleep(1);
retry++;
errmsg = NULL;
- if (buf)
+ if (buf) {
free(buf);
+ buf = NULL;
+ }
if (sysctl(mib, 6, NULL, &msize, NULL, 0) < 0) {
errmsg = "sysctl estimate";
continue;
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