From 94d818db907d34dea1063ef0d0e0045fe88b0541 Mon Sep 17 00:00:00 2001
From: Michael Scire <SciresM@gmail.com>
Date: Wed, 2 Dec 2020 04:05:16 -0800
Subject: [PATCH] kern: fix KHandleTable null deref in ipc

---
 .../include/mesosphere/kern_k_handle_table.hpp              | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/libraries/libmesosphere/include/mesosphere/kern_k_handle_table.hpp b/libraries/libmesosphere/include/mesosphere/kern_k_handle_table.hpp
index 838f58028..5cbbaf489 100644
--- a/libraries/libmesosphere/include/mesosphere/kern_k_handle_table.hpp
+++ b/libraries/libmesosphere/include/mesosphere/kern_k_handle_table.hpp
@@ -166,8 +166,10 @@ namespace ams::kern {
                 KScopedSpinLock lk(this->lock);
 
                 KAutoObject *obj = this->GetObjectImpl(handle);
-                if (obj->DynamicCast<KInterruptEvent *>() != nullptr) {
-                    return nullptr;
+                if (AMS_LIKELY(obj != nullptr)) {
+                    if (AMS_UNLIKELY(obj->DynamicCast<KInterruptEvent *>() != nullptr)) {
+                        return nullptr;
+                    }
                 }
 
                 return obj;