diff --git a/Userland/Libraries/LibGfx/Bitmap.cpp b/Userland/Libraries/LibGfx/Bitmap.cpp
index a174c58c8b5..f9a38cd242e 100644
--- a/Userland/Libraries/LibGfx/Bitmap.cpp
+++ b/Userland/Libraries/LibGfx/Bitmap.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2023, Andreas Kling <kling@serenityos.org>
+ * Copyright (c) 2018-2024, Andreas Kling <kling@serenityos.org>
  * Copyright (c) 2022, Timothy Slater <tslater2006@gmail.com>
  *
  * SPDX-License-Identifier: BSD-2-Clause
@@ -23,9 +23,7 @@
 #include <LibGfx/ImageFormats/ImageDecoder.h>
 #include <LibGfx/ShareableBitmap.h>
 #include <errno.h>
-#include <fcntl.h>
 #include <stdio.h>
-#include <sys/mman.h>
 
 namespace Gfx {
 
@@ -93,7 +91,7 @@ Bitmap::Bitmap(BitmapFormat format, IntSize size, int scale_factor, BackingStore
     VERIFY(!size_would_overflow(format, size, scale_factor));
     VERIFY(m_data);
     VERIFY(backing_store.size_in_bytes == size_in_bytes());
-    m_needs_munmap = true;
+    m_data_is_malloced = true;
 }
 
 ErrorOr<NonnullRefPtr<Bitmap>> Bitmap::create_wrapper(BitmapFormat format, IntSize size, int scale_factor, size_t pitch, void* data)
@@ -550,9 +548,8 @@ ErrorOr<NonnullRefPtr<Gfx::Bitmap>> Bitmap::inverted() const
 
 Bitmap::~Bitmap()
 {
-    if (m_needs_munmap) {
-        int rc = munmap(m_data, size_in_bytes());
-        VERIFY(rc == 0);
+    if (m_data_is_malloced) {
+        kfree_sized(m_data, size_in_bytes());
     }
     m_data = nullptr;
 }
@@ -583,20 +580,17 @@ Gfx::ShareableBitmap Bitmap::to_shareable_bitmap() const
 
 ErrorOr<BackingStore> Bitmap::allocate_backing_store(BitmapFormat format, IntSize size, int scale_factor)
 {
+    if (size.is_empty())
+        return Error::from_string_literal("Gfx::Bitmap backing store size is empty");
+
     if (size_would_overflow(format, size, scale_factor))
         return Error::from_string_literal("Gfx::Bitmap backing store size overflow");
 
     auto const pitch = minimum_pitch(size.width() * scale_factor, format);
     auto const data_size_in_bytes = size_in_bytes(pitch, size.height() * scale_factor);
 
-    int map_flags = MAP_ANONYMOUS | MAP_PRIVATE;
-#ifdef AK_OS_SERENITY
-    map_flags |= MAP_PURGEABLE;
-    void* data = mmap_with_name(nullptr, data_size_in_bytes, PROT_READ | PROT_WRITE, map_flags, 0, 0, ByteString::formatted("GraphicsBitmap [{}]", size).characters());
-#else
-    void* data = mmap(nullptr, data_size_in_bytes, PROT_READ | PROT_WRITE, map_flags, -1, 0);
-#endif
-    if (data == MAP_FAILED)
+    void* data = kcalloc(1, data_size_in_bytes);
+    if (data == nullptr)
         return Error::from_errno(errno);
     return BackingStore { data, pitch, data_size_in_bytes };
 }
diff --git a/Userland/Libraries/LibGfx/Bitmap.h b/Userland/Libraries/LibGfx/Bitmap.h
index 9fe56beb90c..4c530c5164e 100644
--- a/Userland/Libraries/LibGfx/Bitmap.h
+++ b/Userland/Libraries/LibGfx/Bitmap.h
@@ -244,7 +244,7 @@ private:
     void* m_data { nullptr };
     size_t m_pitch { 0 };
     BitmapFormat m_format { BitmapFormat::Invalid };
-    bool m_needs_munmap { false };
+    bool m_data_is_malloced { false };
     Core::AnonymousBuffer m_buffer;
 };