From 8eb59271a520888aa1eaae1eb90e7b8ff81b47c6 Mon Sep 17 00:00:00 2001
From: eladash <elad3356p@gmail.com>
Date: Mon, 11 Mar 2019 21:31:45 +0200
Subject: [PATCH] Improve error checking of cellVdecOpen

Those are the initial argument checks done by the firmware
---
 rpcs3/Emu/Cell/Modules/cellVdec.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/rpcs3/Emu/Cell/Modules/cellVdec.cpp b/rpcs3/Emu/Cell/Modules/cellVdec.cpp
index d9a6866f7c..27ee3651cc 100644
--- a/rpcs3/Emu/Cell/Modules/cellVdec.cpp
+++ b/rpcs3/Emu/Cell/Modules/cellVdec.cpp
@@ -435,6 +435,17 @@ s32 cellVdecQueryAttrEx(vm::cptr<CellVdecTypeEx> type, vm::ptr<CellVdecAttr> att
 template <typename T, typename U>
 static s32 vdecOpen(ppu_thread& ppu, T type, U res, vm::cptr<CellVdecCb> cb, vm::ptr<u32> handle)
 {
+	if (!type || !res || !cb || !handle)
+	{
+		return CELL_VDEC_ERROR_ARG;
+	}
+
+	if (u32(res->ppuThreadPriority) > 3071 || u32(res->spuThreadPriority) > 255 || res->ppuThreadStackSize < 4096
+		|| u32(type->codecType) > 0xd)
+	{
+		return CELL_VDEC_ERROR_ARG;
+	}
+
 	// Create decoder context
 	const u32 vid = idm::make<vdec_context>(type->codecType, type->profileLevel, res->memAddr, res->memSize, cb->cbFunc, cb->cbArg);