Revision: 56753
http://sourceforge.net/p/brlcad/code/56753
Author: brlcad
Date: 2013-08-12 18:54:59 +0000 (Mon, 12 Aug 2013)
Log Message:
-----------
some basic sanity checking, hunting a stack smash
Modified Paths:
--------------
brlcad/trunk/src/librt/primitives/bot/bot.c
Modified: brlcad/trunk/src/librt/primitives/bot/bot.c
===================================================================
--- brlcad/trunk/src/librt/primitives/bot/bot.c 2013-08-12 18:53:41 UTC (rev
56752)
+++ brlcad/trunk/src/librt/primitives/bot/bot.c 2013-08-12 18:54:59 UTC (rev
56753)
@@ -352,8 +352,15 @@
int
rt_bot_shot(struct soltab *stp, struct xray *rp, struct application *ap,
struct seg *seghead)
{
- struct bot_specific *bot = (struct bot_specific *)stp->st_specific;
+ struct bot_specific *bot;
+ if (UNLIKELY(!stp || !ap || !seghead))
+ return 0;
+
+ bot = (struct bot_specific *)stp->st_specific;
+ if (UNLIKELY(!bot))
+ return 0;
+
if (bot->tie != NULL) {
return bottie_shot_double(stp, rp, ap, seghead);
} else if (bot->bot_flags & RT_BOT_USE_FLOATS) {
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