diff --git a/src/Core/PS4/HLE/Kernel/Objects/physical_memory.cpp b/src/Core/PS4/HLE/Kernel/Objects/physical_memory.cpp
index 7091b8fe..50f60f3f 100644
--- a/src/Core/PS4/HLE/Kernel/Objects/physical_memory.cpp
+++ b/src/Core/PS4/HLE/Kernel/Objects/physical_memory.cpp
@@ -5,6 +5,7 @@ namespace HLE::Kernel::Objects {
 static u64 AlignUp(u64 pos, u64 align) { return (align != 0 ? (pos + (align - 1)) & ~(align - 1) : pos); }
 
 bool PhysicalMemory::Alloc(u64 searchStart, u64 searchEnd, u64 len, u64 alignment, u64* physAddrOut, int memoryType) {
+    Lib::LockMutexGuard lock(m_mutex);
     u64 find_free_pos = 0;
 
     // iterate through allocated blocked and find the next free position
@@ -39,6 +40,7 @@ bool PhysicalMemory::Alloc(u64 searchStart, u64 searchEnd, u64 len, u64 alignmen
     return false;
 }
 bool PhysicalMemory::Map(u64 virtual_addr, u64 phys_addr, u64 len, int prot, VirtualMemory::MemoryMode cpu_mode, GPU::MemoryMode gpu_mode) {
+    Lib::LockMutexGuard lock(m_mutex);
     for (auto& b : m_allocatedBlocks) {
         if (phys_addr >= b.start_addr && phys_addr < b.start_addr + b.size) {
             if (b.map_virtual_addr != 0 || b.map_size != 0) {
diff --git a/src/Core/PS4/HLE/Kernel/Objects/physical_memory.h b/src/Core/PS4/HLE/Kernel/Objects/physical_memory.h
index a64cb374..e2e9ce49 100644
--- a/src/Core/PS4/HLE/Kernel/Objects/physical_memory.h
+++ b/src/Core/PS4/HLE/Kernel/Objects/physical_memory.h
@@ -3,6 +3,7 @@
 #include <Core/virtual_memory.h>
 #include <Core/PS4/GPU/gpu_memory.h>
 #include <vector>
+#include "Lib/Threads.h"
 
 namespace HLE::Kernel::Objects {
 
@@ -27,6 +28,7 @@ class PhysicalMemory {
 
   private:
     std::vector<AllocatedBlock> m_allocatedBlocks;
+    Lib::Mutex m_mutex;
 };
 
 }  // namespace HLE::Kernel::Objects
\ No newline at end of file
diff --git a/src/Core/PS4/HLE/Kernel/memory_management.cpp b/src/Core/PS4/HLE/Kernel/memory_management.cpp
index 91b72ba3..1840badf 100644
--- a/src/Core/PS4/HLE/Kernel/memory_management.cpp
+++ b/src/Core/PS4/HLE/Kernel/memory_management.cpp
@@ -67,22 +67,20 @@ int PS4_SYSV_ABI sceKernelAllocateDirectMemory(s64 searchStart, s64 searchEnd, u
 
 int PS4_SYSV_ABI sceKernelMapDirectMemory(void** addr, u64 len, int prot, int flags, s64 directMemoryStart, u64 alignment) {
     PRINT_FUNCTION_NAME();
-    if (len == 0 || !is16KBAligned(len))
-    {
+    if (len == 0 || !is16KBAligned(len)) {
         LOG_TRACE_IF(log_file_memory, "sceKernelMapDirectMemory returned SCE_KERNEL_ERROR_EINVAL len invalid\n");
         return SCE_KERNEL_ERROR_EINVAL;
     }
-    if (!is16KBAligned(directMemoryStart))
-    {
+    if (!is16KBAligned(directMemoryStart)) {
         LOG_TRACE_IF(log_file_memory, "sceKernelMapDirectMemory returned SCE_KERNEL_ERROR_EINVAL directMemoryStart invalid\n");
         return SCE_KERNEL_ERROR_EINVAL;
     }
-    if (alignment != 0 || (!isPowerOfTwo(alignment) && !is16KBAligned(alignment)))
-    {
-        LOG_TRACE_IF(log_file_memory, "sceKernelMapDirectMemory returned SCE_KERNEL_ERROR_EINVAL alignment invalid\n");
-        return SCE_KERNEL_ERROR_EINVAL;
+    if (alignment != 0) {
+        if ((!isPowerOfTwo(alignment) && !is16KBAligned(alignment))){
+            LOG_TRACE_IF(log_file_memory, "sceKernelMapDirectMemory returned SCE_KERNEL_ERROR_EINVAL alignment invalid\n");
+            return SCE_KERNEL_ERROR_EINVAL;
+            }
     }
-    auto* physical_memory = Singleton<HLE::Kernel::Objects::PhysicalMemory>::Instance();
 
     LOG_INFO_IF(log_file_memory, "len               = {}\n", log_hex_full(len));
     LOG_INFO_IF(log_file_memory, "prot              = {}\n", log_hex_full(prot));
@@ -94,7 +92,7 @@ int PS4_SYSV_ABI sceKernelMapDirectMemory(void** addr, u64 len, int prot, int fl
     GPU::MemoryMode gpu_mode = GPU::MemoryMode::NoAccess;
 
     switch (prot) {
-        case 0x33://SCE_KERNEL_PROT_CPU_READ|SCE_KERNEL_PROT_CPU_WRITE|SCE_KERNEL_PROT_GPU_READ|SCE_KERNEL_PROT_GPU_ALL
+        case 0x33:  // SCE_KERNEL_PROT_CPU_READ|SCE_KERNEL_PROT_CPU_WRITE|SCE_KERNEL_PROT_GPU_READ|SCE_KERNEL_PROT_GPU_ALL
             cpu_mode = VirtualMemory::MemoryMode::ReadWrite;
             gpu_mode = GPU::MemoryMode::ReadWrite;
             break;
@@ -116,6 +114,7 @@ int PS4_SYSV_ABI sceKernelMapDirectMemory(void** addr, u64 len, int prot, int fl
         return SCE_KERNEL_ERROR_ENOMEM;
     }
 
+    auto* physical_memory = Singleton<HLE::Kernel::Objects::PhysicalMemory>::Instance();
     if (!physical_memory->Map(out_addr, directMemoryStart, len, prot, cpu_mode, gpu_mode)) {
         BREAKPOINT();
     }
@@ -123,7 +122,6 @@ int PS4_SYSV_ABI sceKernelMapDirectMemory(void** addr, u64 len, int prot, int fl
     if (gpu_mode != GPU::MemoryMode::NoAccess) {
         GPU::MemorySetAllocArea(out_addr, len);
     }
-
     return SCE_OK;
 }
 
diff --git a/src/Core/PS4/Linker.cpp b/src/Core/PS4/Linker.cpp
index cdb1febf..d048054b 100644
--- a/src/Core/PS4/Linker.cpp
+++ b/src/Core/PS4/Linker.cpp
@@ -70,6 +70,7 @@ static std::string encodeId(u64 nVal)
 }
 Module* Linker::LoadModule(const std::string& elf_name)
 {
+    Lib::LockMutexGuard lock(m_mutex);
 	auto* m = new Module;
     m->linker = this;
 	m->elf = new Elf;
diff --git a/src/Core/PS4/Linker.h b/src/Core/PS4/Linker.h
index 13f45acf..e34cce04 100644
--- a/src/Core/PS4/Linker.h
+++ b/src/Core/PS4/Linker.h
@@ -3,6 +3,7 @@
 #include <vector>
 #include "Loader/Elf.h"
 #include "Loader/SymbolsResolver.h"
+#include "Lib/Threads.h"
 
 struct DynamicModuleInfo;
 class Linker;
@@ -129,4 +130,5 @@ public:
 
 	std::vector<Module*> m_modules;
 	SymbolsResolver* m_HLEsymbols = nullptr;
+    Lib::Mutex m_mutex;
 };
\ No newline at end of file
diff --git a/src/Lib/Threads.h b/src/Lib/Threads.h
index 4ca5f515..3773eaf5 100644
--- a/src/Lib/Threads.h
+++ b/src/Lib/Threads.h
@@ -121,5 +121,11 @@ class LockMutexGuard {
 
   private:
     Mutex& m_mutex;
+
+  public:
+    LockMutexGuard(const LockMutexGuard&) = delete;
+    LockMutexGuard& operator=(const LockMutexGuard&) = delete;
+    LockMutexGuard(LockMutexGuard&&) noexcept = delete;
+    LockMutexGuard& operator=(LockMutexGuard&&) noexcept = delete;
 };
 }  // namespace Lib
\ No newline at end of file