From 8d77d51e636f5384b0b024350a0a219e041b5446 Mon Sep 17 00:00:00 2001
From: andreykproductengine <andreykproductengine@lindenlab.com>
Date: Mon, 15 Jul 2019 17:56:30 +0300
Subject: SL-10908 Safeguards and potential crash fix

---
 indra/newview/llcontrolavatar.cpp    | 9 ++++++---
 indra/newview/llsky.cpp              | 2 +-
 indra/newview/llsurfacepatch.cpp     | 2 +-
 indra/newview/llviewerobjectlist.cpp | 6 +++++-
 indra/newview/llworld.cpp            | 4 ++--
 indra/newview/llworld.h              | 2 +-
 6 files changed, 16 insertions(+), 9 deletions(-)

(limited to 'indra')

diff --git a/indra/newview/llcontrolavatar.cpp b/indra/newview/llcontrolavatar.cpp
index d24dac385f..92eeebd705 100644
--- a/indra/newview/llcontrolavatar.cpp
+++ b/indra/newview/llcontrolavatar.cpp
@@ -327,10 +327,13 @@ LLControlAvatar *LLControlAvatar::createControlAvatar(LLVOVolume *obj)
 {
 	LLControlAvatar *cav = (LLControlAvatar*)gObjectList.createObjectViewer(LL_PCODE_LEGACY_AVATAR, gAgent.getRegion(), CO_FLAG_CONTROL_AVATAR);
 
-    cav->mRootVolp = obj;
+    if (cav)
+    {
+        cav->mRootVolp = obj;
 
-    // Sync up position/rotation with object
-    cav->matchVolumeTransform();
+        // Sync up position/rotation with object
+        cav->matchVolumeTransform();
+    }
 
     return cav;
 }
diff --git a/indra/newview/llsky.cpp b/indra/newview/llsky.cpp
index 3ef89ba920..5e2442798b 100644
--- a/indra/newview/llsky.cpp
+++ b/indra/newview/llsky.cpp
@@ -119,7 +119,7 @@ void LLSky::restoreGL()
 
 void LLSky::resetVertexBuffers()
 {
-	if (gSky.mVOSkyp.notNull())
+	if (gSky.mVOSkyp.notNull() && gSky.mVOGroundp.notNull())
 	{
 		gPipeline.resetVertexBuffers(gSky.mVOSkyp->mDrawable);
 		gPipeline.resetVertexBuffers(gSky.mVOGroundp->mDrawable);
diff --git a/indra/newview/llsurfacepatch.cpp b/indra/newview/llsurfacepatch.cpp
index f6cf714db4..5e056944e9 100644
--- a/indra/newview/llsurfacepatch.cpp
+++ b/indra/newview/llsurfacepatch.cpp
@@ -203,7 +203,7 @@ LLVector2 LLSurfacePatch::getTexCoords(const U32 x, const U32 y) const
 void LLSurfacePatch::eval(const U32 x, const U32 y, const U32 stride, LLVector3 *vertex, LLVector3 *normal,
 						  LLVector2 *tex0, LLVector2 *tex1)
 {
-	if (!mSurfacep || !mSurfacep->getRegion() || !mSurfacep->getGridsPerEdge())
+	if (!mSurfacep || !mSurfacep->getRegion() || !mSurfacep->getGridsPerEdge() || !mVObjp)
 	{
 		return; // failsafe
 	}
diff --git a/indra/newview/llviewerobjectlist.cpp b/indra/newview/llviewerobjectlist.cpp
index 932759c86d..2bf04dc204 100644
--- a/indra/newview/llviewerobjectlist.cpp
+++ b/indra/newview/llviewerobjectlist.cpp
@@ -1383,7 +1383,11 @@ BOOL LLViewerObjectList::killObject(LLViewerObject *objectp)
 
 	if (objectp)
 	{
-		objectp->markDead(); // does the right thing if object already dead
+		// We are going to cleanup a lot of smart pointers to this object, they might be last,
+		// and object being NULLed while inside it's own function won't be pretty
+		// so create a pointer to make sure object will stay alive untill markDead() finishes
+		LLPointer<LLViewerObject> sp(objectp);
+		sp->markDead(); // does the right thing if object already dead
 		return TRUE;
 	}
 
diff --git a/indra/newview/llworld.cpp b/indra/newview/llworld.cpp
index cee47a591e..89f5eb86b3 100644
--- a/indra/newview/llworld.cpp
+++ b/indra/newview/llworld.cpp
@@ -916,10 +916,10 @@ void LLWorld::updateWaterObjects()
 		}
 	}
 
-	for (std::list<LLVOWater*>::iterator iter = mHoleWaterObjects.begin();
+	for (std::list<LLPointer<LLVOWater> >::iterator iter = mHoleWaterObjects.begin();
 		 iter != mHoleWaterObjects.end(); ++ iter)
 	{
-		LLVOWater* waterp = *iter;
+		LLVOWater* waterp = (*iter).get();
 		gObjectList.killObject(waterp);
 	}
 	mHoleWaterObjects.clear();
diff --git a/indra/newview/llworld.h b/indra/newview/llworld.h
index c9ac241d5a..993fbfb2cc 100644
--- a/indra/newview/llworld.h
+++ b/indra/newview/llworld.h
@@ -199,7 +199,7 @@ private:
 	// Data for "Fake" objects
 	//
 
-	std::list<LLVOWater*> mHoleWaterObjects;
+	std::list<LLPointer<LLVOWater> > mHoleWaterObjects;
 	LLPointer<LLVOWater> mEdgeWaterObjects[8];
 
 	LLPointer<LLViewerTexture> mDefaultWaterTexturep;
-- 
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