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fatalloc

“Fault tolerant” memory allocator for Linux

This library provides a drop-in replacement for the standard C allocation functions. Add libfatalloc.so to LD_PRELOAD to “fix” minor heap overruns in faulty software.

Using this library has a negative impact on security and may lead to loss of data, financial damage, strangelet creation, maximum overdrive, Xindi attacks, or death. Use at your own peril.

Inspired by Windows Fault Tolerant Heap. Written in Rust(🚀).

Why the security impact?

While reducing the likelihood of application crashes may seem appealing to some people, it doesn't necessarily mean bugs are actually fixed if done in a wrong way. In fact, application crashes are symptoms of underlying bugs and meant to stop the faulty program that is already straying from the designed behavior from going even worse, e.g., incurring permanent damage to your files, impeding an Iranian nuclear program, violating the right to privacy, or even taking human lives. Modern binary exploit mitigation techniques, such as ShadowCallStack and Control Flow Guard, are often designed to immediately abort the faulting program at the first sign of security violation. The heap implementations in modern operating systems evolved as well to detect heap usage errors and thwart potential heap-based exploits¹. All this library does is to undo these efforts.

¹ Mark E. Russinovich, David A. Solomon, Alex Ionescu, Windows Internals, Part 2 (6th edition), pp 224–225.

Features

  • Real-time memory allocator with good throughput (implemented by rlsf)
  • Insert padding around allocations to mitigate heap overruns
  • Ignore invalid deallocation requests
  • Delay deallocation to nullify brief use-after-free

Usage

Nix Flake

export LD_PRELOAD=(nix build --no-link --print-out-paths github:yvt/fatalloc)/lib/libfatalloc.so)
faulty-program

To cross-build for x86 (32-bit) applications:

export LD_PRELOAD=(nix build --no-link --print-out-paths github:yvt/fatalloc#defaultPackage.i686-linux)/lib/libfatalloc.so)

Traditional Linux

Go to the Actions tab, select the latest CI run, and download a precompiled binary from the Artifacts section.

Note:You must be logged in to GitHub to download artifacts.

License

This program is licensed under the GNU Lesser General Public License version 3 or later.

About

Fault tolerant memory allocator that “fixes” minor heap overruns

Topics

linuxmemory-allocatormemory-errorsrustsinwork-around

Resources

Readme
License
Activity

Stars

0 stars

Watchers

1 watching

Forks

0 forks
Report repository

Releases

Packages

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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This repository was archived by the owner on Apr 21, 2025. It is now read-only.

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fatalloc
“Fault tolerant” memory allocator for Linux
This library provides a drop-in replacement for the standard C allocation
functions. Add libfatalloc.so to LD_PRELOAD to “fix” minor heap overruns
in faulty software.
Using this library has a negative impact on security and may lead to loss of
data, financial damage, strangelet creation, maximum overdrive, Xindi attacks,
or death. Use at your own peril.
Inspired by Windows Fault Tolerant Heap. Written in Rust(🚀).
Why the security impact?
While reducing the likelihood of application crashes may seem appealing to some
people, it doesn't necessarily mean bugs are actually fixed if done in a wrong
way. In fact, application crashes are symptoms of underlying bugs and meant to
stop the faulty program that is already straying from the designed behavior from
going even worse, e.g., incurring permanent damage to your files, impeding
an Iranian nuclear program, violating the right to privacy, or even
taking human lives. Modern binary exploit mitigation techniques, such as
ShadowCallStack and Control Flow Guard, are often designed to
immediately abort the faulting program at the first sign of security violation.
The heap implementations in modern operating systems evolved as well to detect
heap usage errors and thwart potential heap-based exploits¹. All this library
does is to undo these efforts.
¹ Mark E. Russinovich, David A. Solomon, Alex Ionescu, Windows Internals,
Part 2 (6th edition), pp 224–225.
Features
  •  Real-time memory allocator with good throughput (implemented by
rlsf)
  •  Insert padding around allocations to mitigate heap overruns
  •  Ignore invalid deallocation requests
  •  Delay deallocation to nullify brief use-after-free
Usage
Nix Flake
export LD_PRELOAD=(nix build --no-link --print-out-paths github:yvt/fatalloc)/lib/libfatalloc.so)
faulty-program
To cross-build for x86 (32-bit) applications:
export LD_PRELOAD=(nix build --no-link --print-out-paths github:yvt/fatalloc#defaultPackage.i686-linux)/lib/libfatalloc.so)
Traditional Linux
Go to the Actions tab, select the latest CI run, and download a
precompiled binary from the Artifacts section.
Note:You must be logged in to GitHub to download artifacts.
License
This program is licensed under the GNU Lesser General Public License version 3
or later.
About
Fault tolerant memory allocator that “fixes” minor heap overruns
Topics
linuxmemory-allocatormemory-errorsrustsinwork-around
Resources
Readme
License
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content

This repository was archived by the owner on Apr 21, 2025. It is now read-only.

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fatalloc
“Fault tolerant” memory allocator for Linux
This library provides a drop-in replacement for the standard C allocation
functions. Add libfatalloc.so to LD_PRELOAD to “fix” minor heap overruns
in faulty software.
Using this library has a negative impact on security and may lead to loss of
data, financial damage, strangelet creation, maximum overdrive, Xindi attacks,
or death. Use at your own peril.
Inspired by Windows Fault Tolerant Heap. Written in Rust(🚀).
Why the security impact?
While reducing the likelihood of application crashes may seem appealing to some
people, it doesn't necessarily mean bugs are actually fixed if done in a wrong
way. In fact, application crashes are symptoms of underlying bugs and meant to
stop the faulty program that is already straying from the designed behavior from
going even worse, e.g., incurring permanent damage to your files, impeding
an Iranian nuclear program, violating the right to privacy, or even
taking human lives. Modern binary exploit mitigation techniques, such as
ShadowCallStack and Control Flow Guard, are often designed to
immediately abort the faulting program at the first sign of security violation.
The heap implementations in modern operating systems evolved as well to detect
heap usage errors and thwart potential heap-based exploits¹. All this library
does is to undo these efforts.
¹ Mark E. Russinovich, David A. Solomon, Alex Ionescu, Windows Internals,
Part 2 (6th edition), pp 224–225.
Features
  •  Real-time memory allocator with good throughput (implemented by
rlsf)
  •  Insert padding around allocations to mitigate heap overruns
  •  Ignore invalid deallocation requests
  •  Delay deallocation to nullify brief use-after-free
Usage
Nix Flake
export LD_PRELOAD=(nix build --no-link --print-out-paths github:yvt/fatalloc)/lib/libfatalloc.so)
faulty-program
To cross-build for x86 (32-bit) applications:
export LD_PRELOAD=(nix build --no-link --print-out-paths github:yvt/fatalloc#defaultPackage.i686-linux)/lib/libfatalloc.so)
Traditional Linux
Go to the Actions tab, select the latest CI run, and download a
precompiled binary from the Artifacts section.
Note:You must be logged in to GitHub to download artifacts.
License
This program is licensed under the GNU Lesser General Public License version 3
or later.
About
Fault tolerant memory allocator that “fixes” minor heap overruns
Topics
linuxmemory-allocatormemory-errorsrustsinwork-around
Resources
Readme
License
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content

This repository was archived by the owner on Apr 21, 2025. It is now read-only.

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fatalloc
“Fault tolerant” memory allocator for Linux
This library provides a drop-in replacement for the standard C allocation
functions. Add libfatalloc.so to LD_PRELOAD to “fix” minor heap overruns
in faulty software.
Using this library has a negative impact on security and may lead to loss of
data, financial damage, strangelet creation, maximum overdrive, Xindi attacks,
or death. Use at your own peril.
Inspired by Windows Fault Tolerant Heap. Written in Rust(🚀).
Why the security impact?
While reducing the likelihood of application crashes may seem appealing to some
people, it doesn't necessarily mean bugs are actually fixed if done in a wrong
way. In fact, application crashes are symptoms of underlying bugs and meant to
stop the faulty program that is already straying from the designed behavior from
going even worse, e.g., incurring permanent damage to your files, impeding
an Iranian nuclear program, violating the right to privacy, or even
taking human lives. Modern binary exploit mitigation techniques, such as
ShadowCallStack and Control Flow Guard, are often designed to
immediately abort the faulting program at the first sign of security violation.
The heap implementations in modern operating systems evolved as well to detect
heap usage errors and thwart potential heap-based exploits¹. All this library
does is to undo these efforts.
¹ Mark E. Russinovich, David A. Solomon, Alex Ionescu, Windows Internals,
Part 2 (6th edition), pp 224–225.
Features
  •  Real-time memory allocator with good throughput (implemented by
rlsf)
  •  Insert padding around allocations to mitigate heap overruns
  •  Ignore invalid deallocation requests
  •  Delay deallocation to nullify brief use-after-free
Usage
Nix Flake
export LD_PRELOAD=(nix build --no-link --print-out-paths github:yvt/fatalloc)/lib/libfatalloc.so)
faulty-program
To cross-build for x86 (32-bit) applications:
export LD_PRELOAD=(nix build --no-link --print-out-paths github:yvt/fatalloc#defaultPackage.i686-linux)/lib/libfatalloc.so)
Traditional Linux
Go to the Actions tab, select the latest CI run, and download a
precompiled binary from the Artifacts section.
Note:You must be logged in to GitHub to download artifacts.
License
This program is licensed under the GNU Lesser General Public License version 3
or later.
About
Fault tolerant memory allocator that “fixes” minor heap overruns
Topics
linuxmemory-allocatormemory-errorsrustsinwork-around
Resources
Readme
License
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content

This repository was archived by the owner on Apr 21, 2025. It is now read-only.

BranchesTags
Repository files navigation
fatalloc
“Fault tolerant” memory allocator for Linux
This library provides a drop-in replacement for the standard C allocation
functions. Add libfatalloc.so to LD_PRELOAD to “fix” minor heap overruns
in faulty software.
Using this library has a negative impact on security and may lead to loss of
data, financial damage, strangelet creation, maximum overdrive, Xindi attacks,
or death. Use at your own peril.
Inspired by Windows Fault Tolerant Heap. Written in Rust(🚀).
Why the security impact?
While reducing the likelihood of application crashes may seem appealing to some
people, it doesn't necessarily mean bugs are actually fixed if done in a wrong
way. In fact, application crashes are symptoms of underlying bugs and meant to
stop the faulty program that is already straying from the designed behavior from
going even worse, e.g., incurring permanent damage to your files, impeding
an Iranian nuclear program, violating the right to privacy, or even
taking human lives. Modern binary exploit mitigation techniques, such as
ShadowCallStack and Control Flow Guard, are often designed to
immediately abort the faulting program at the first sign of security violation.
The heap implementations in modern operating systems evolved as well to detect
heap usage errors and thwart potential heap-based exploits¹. All this library
does is to undo these efforts.
¹ Mark E. Russinovich, David A. Solomon, Alex Ionescu, Windows Internals,
Part 2 (6th edition), pp 224–225.
Features
  •  Real-time memory allocator with good throughput (implemented by
rlsf)
  •  Insert padding around allocations to mitigate heap overruns
  •  Ignore invalid deallocation requests
  •  Delay deallocation to nullify brief use-after-free
Usage
Nix Flake
export LD_PRELOAD=(nix build --no-link --print-out-paths github:yvt/fatalloc)/lib/libfatalloc.so)
faulty-program
To cross-build for x86 (32-bit) applications:
export LD_PRELOAD=(nix build --no-link --print-out-paths github:yvt/fatalloc#defaultPackage.i686-linux)/lib/libfatalloc.so)
Traditional Linux
Go to the Actions tab, select the latest CI run, and download a
precompiled binary from the Artifacts section.
Note:You must be logged in to GitHub to download artifacts.
License
This program is licensed under the GNU Lesser General Public License version 3
or later.
About
Fault tolerant memory allocator that “fixes” minor heap overruns
Topics
linuxmemory-allocatormemory-errorsrustsinwork-around
Resources
Readme
License
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content

This repository was archived by the owner on Apr 21, 2025. It is now read-only.

BranchesTags
Repository files navigation
fatalloc
“Fault tolerant” memory allocator for Linux
This library provides a drop-in replacement for the standard C allocation
functions. Add libfatalloc.so to LD_PRELOAD to “fix” minor heap overruns
in faulty software.
Using this library has a negative impact on security and may lead to loss of
data, financial damage, strangelet creation, maximum overdrive, Xindi attacks,
or death. Use at your own peril.
Inspired by Windows Fault Tolerant Heap. Written in Rust(🚀).
Why the security impact?
While reducing the likelihood of application crashes may seem appealing to some
people, it doesn't necessarily mean bugs are actually fixed if done in a wrong
way. In fact, application crashes are symptoms of underlying bugs and meant to
stop the faulty program that is already straying from the designed behavior from
going even worse, e.g., incurring permanent damage to your files, impeding
an Iranian nuclear program, violating the right to privacy, or even
taking human lives. Modern binary exploit mitigation techniques, such as
ShadowCallStack and Control Flow Guard, are often designed to
immediately abort the faulting program at the first sign of security violation.
The heap implementations in modern operating systems evolved as well to detect
heap usage errors and thwart potential heap-based exploits¹. All this library
does is to undo these efforts.
¹ Mark E. Russinovich, David A. Solomon, Alex Ionescu, Windows Internals,
Part 2 (6th edition), pp 224–225.
Features
  •  Real-time memory allocator with good throughput (implemented by
rlsf)
  •  Insert padding around allocations to mitigate heap overruns
  •  Ignore invalid deallocation requests
  •  Delay deallocation to nullify brief use-after-free
Usage
Nix Flake
export LD_PRELOAD=(nix build --no-link --print-out-paths github:yvt/fatalloc)/lib/libfatalloc.so)
faulty-program
To cross-build for x86 (32-bit) applications:
export LD_PRELOAD=(nix build --no-link --print-out-paths github:yvt/fatalloc#defaultPackage.i686-linux)/lib/libfatalloc.so)
Traditional Linux
Go to the Actions tab, select the latest CI run, and download a
precompiled binary from the Artifacts section.
Note:You must be logged in to GitHub to download artifacts.
License
This program is licensed under the GNU Lesser General Public License version 3
or later.
About
Fault tolerant memory allocator that “fixes” minor heap overruns
Topics
linuxmemory-allocatormemory-errorsrustsinwork-around
Resources
Readme
License
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content

This repository was archived by the owner on Apr 21, 2025. It is now read-only.

BranchesTags
Repository files navigation
fatalloc
“Fault tolerant” memory allocator for Linux
This library provides a drop-in replacement for the standard C allocation
functions. Add libfatalloc.so to LD_PRELOAD to “fix” minor heap overruns
in faulty software.
Using this library has a negative impact on security and may lead to loss of
data, financial damage, strangelet creation, maximum overdrive, Xindi attacks,
or death. Use at your own peril.
Inspired by Windows Fault Tolerant Heap. Written in Rust(🚀).
Why the security impact?
While reducing the likelihood of application crashes may seem appealing to some
people, it doesn't necessarily mean bugs are actually fixed if done in a wrong
way. In fact, application crashes are symptoms of underlying bugs and meant to
stop the faulty program that is already straying from the designed behavior from
going even worse, e.g., incurring permanent damage to your files, impeding
an Iranian nuclear program, violating the right to privacy, or even
taking human lives. Modern binary exploit mitigation techniques, such as
ShadowCallStack and Control Flow Guard, are often designed to
immediately abort the faulting program at the first sign of security violation.
The heap implementations in modern operating systems evolved as well to detect
heap usage errors and thwart potential heap-based exploits¹. All this library
does is to undo these efforts.
¹ Mark E. Russinovich, David A. Solomon, Alex Ionescu, Windows Internals,
Part 2 (6th edition), pp 224–225.
Features
  •  Real-time memory allocator with good throughput (implemented by
rlsf)
  •  Insert padding around allocations to mitigate heap overruns
  •  Ignore invalid deallocation requests
  •  Delay deallocation to nullify brief use-after-free
Usage
Nix Flake
export LD_PRELOAD=(nix build --no-link --print-out-paths github:yvt/fatalloc)/lib/libfatalloc.so)
faulty-program
To cross-build for x86 (32-bit) applications:
export LD_PRELOAD=(nix build --no-link --print-out-paths github:yvt/fatalloc#defaultPackage.i686-linux)/lib/libfatalloc.so)
Traditional Linux
Go to the Actions tab, select the latest CI run, and download a
precompiled binary from the Artifacts section.
Note:You must be logged in to GitHub to download artifacts.
License
This program is licensed under the GNU Lesser General Public License version 3
or later.
About
Fault tolerant memory allocator that “fixes” minor heap overruns
Topics
linuxmemory-allocatormemory-errorsrustsinwork-around
Resources
Readme
License
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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fatalloc
“Fault tolerant” memory allocator for Linux
This library provides a drop-in replacement for the standard C allocation
functions. Add libfatalloc.so to LD_PRELOAD to “fix” minor heap overruns
in faulty software.
Using this library has a negative impact on security and may lead to loss of
data, financial damage, strangelet creation, maximum overdrive, Xindi attacks,
or death. Use at your own peril.
Inspired by Windows Fault Tolerant Heap. Written in Rust(🚀).
Why the security impact?
While reducing the likelihood of application crashes may seem appealing to some
people, it doesn't necessarily mean bugs are actually fixed if done in a wrong
way. In fact, application crashes are symptoms of underlying bugs and meant to
stop the faulty program that is already straying from the designed behavior from
going even worse, e.g., incurring permanent damage to your files, impeding
an Iranian nuclear program, violating the right to privacy, or even
taking human lives. Modern binary exploit mitigation techniques, such as
ShadowCallStack and Control Flow Guard, are often designed to
immediately abort the faulting program at the first sign of security violation.
The heap implementations in modern operating systems evolved as well to detect
heap usage errors and thwart potential heap-based exploits¹. All this library
does is to undo these efforts.
¹ Mark E. Russinovich, David A. Solomon, Alex Ionescu, Windows Internals,
Part 2 (6th edition), pp 224–225.
Features
  •  Real-time memory allocator with good throughput (implemented by
rlsf)
  •  Insert padding around allocations to mitigate heap overruns
  •  Ignore invalid deallocation requests
  •  Delay deallocation to nullify brief use-after-free
Usage
Nix Flake
export LD_PRELOAD=(nix build --no-link --print-out-paths github:yvt/fatalloc)/lib/libfatalloc.so)
faulty-program
To cross-build for x86 (32-bit) applications:
export LD_PRELOAD=(nix build --no-link --print-out-paths github:yvt/fatalloc#defaultPackage.i686-linux)/lib/libfatalloc.so)
Traditional Linux
Go to the Actions tab, select the latest CI run, and download a
precompiled binary from the Artifacts section.
Note:You must be logged in to GitHub to download artifacts.
License
This program is licensed under the GNU Lesser General Public License version 3
or later.
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Fault tolerant memory allocator that “fixes” minor heap overruns
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linuxmemory-allocatormemory-errorsrustsinwork-around
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