From 963e20c1cccb7e50a95b46338063978f06d1122f Mon Sep 17 00:00:00 2001
From: Andrey Akhmichin <15944199+nekonomicon@users.noreply.github.com>
Date: Sat, 19 Nov 2022 13:17:49 +0500
Subject: [PATCH] Fix possible null pointer dereference.

---
 dlls/func_tank.cpp | 4 ++--
 dlls/locus.cpp     | 6 +++++-
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/dlls/func_tank.cpp b/dlls/func_tank.cpp
index 8961756a..3fd4678d 100644
--- a/dlls/func_tank.cpp
+++ b/dlls/func_tank.cpp
@@ -824,7 +824,7 @@ void CFuncTank::TrackTarget( void )
 	BOOL updateTime = FALSE, lineOfSight;
 	Vector angles, direction, targetPosition, barrelEnd;
 	Vector v_right, v_up;
-	CBaseEntity *pTarget;
+	CBaseEntity *pTarget = NULL;
 	CBasePlayer* pController = NULL;
 
 //	ALERT(at_console,"TrackTarget\n");
@@ -1111,7 +1111,7 @@ void CFuncTank::TrackTarget( void )
 		Vector forward;
 		UTIL_MakeVectorsPrivate( pev->angles, forward, NULL, NULL );
 
-		if( pev->spawnflags & SF_TANK_LINEOFSIGHT )
+		if( pTarget && pev->spawnflags & SF_TANK_LINEOFSIGHT )
 		{
 			float length = direction.Length();
 			UTIL_TraceLine( barrelEnd, barrelEnd + forward * length, dont_ignore_monsters, edict(), &tr );
diff --git a/dlls/locus.cpp b/dlls/locus.cpp
index 2e90620b..7b8d8dc8 100644
--- a/dlls/locus.cpp
+++ b/dlls/locus.cpp
@@ -259,7 +259,7 @@ void CLocusBeam::Use( CBaseEntity *pActivator, CBaseEntity *pCaller, USE_TYPE us
 	CBaseEntity *pEndEnt;
 	Vector vecStartPos;
 	Vector vecEndPos;
-	CBeam *pBeam;
+	CBeam *pBeam = NULL;
 
 	switch(pev->impulse)
 	{
@@ -297,6 +297,10 @@ void CLocusBeam::Use( CBaseEntity *pActivator, CBaseEntity *pCaller, USE_TYPE us
 		pBeam->PointsInit( vecStartPos, vecStartPos + vecEndPos );
 		break;
 	}
+
+	if( !pBeam )
+		return;
+
 	pBeam->SetColor( pev->rendercolor.x, pev->rendercolor.y, pev->rendercolor.z );
 	pBeam->SetBrightness( pev->renderamt );
 	pBeam->SetNoise( m_iDistortion );