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@0x36
0x36 / oob_events.c
Created November 5, 2020 23:16
IOAccelContext2::finish_fence_event() race condition OOB read/write
#if 0
IOAccelContext2::finish_fence_event() race condition OOB read/write
This is a method exposed to user space, it takes a kernel read-only shared memory
(type 2 via clientMemoryForType()) address and treats it as an IOAccelEvents Array.
The user supplied index is checked against the IOAccelEvents array bounds,since there are no
locks held in this method,it is possible to change the array bounds by calling
IOAccelContext2::clientMemoryForType() again in a separate thread, this will expand the size by
multiplying the older size by 2, but we still have a reference to the old shared memory address
@psifertex
psifertex / 1_Snippet_Instructions.txt
Last active September 30, 2024 19:22
my current collection of snippets
Welcome to Jordan's grab-bag of common Binary Ninja Snippets.
These snippest are meant to run with the Binary Ninja Snippets Plugin
(http://github.com/Vector35/snippets) though they can all also be pasted
directly into the python console or turned into stand-alone plugins if needed.
To install the entire collection at once, just install the Snippets plugin via
the plugin manager (CMD/CTL-SHIFT-M), confirm the Snippet Editor works
(Tool/Snippets/Snippet Editor), and unzip this bundle (Download ZIP above) into
your Snippets folder.
@htr3n
htr3n / macos-ramdisk.md
Last active October 11, 2024 05:16
Creating RAM disk in macOS

Built-in

diskutil erasevolume HFS+ 'RAM Disk' `hdiutil attach -nobrowse -nomount ram://XXXXX`

where XXXXX is the size of the RAM disk in terms of memory blocks.

Notes:

@hellopatrick
hellopatrick / a-brief-history.md
Last active August 5, 2017 12:30
A Brief History of GIF Brewery's Algorithm Options.

In the beginning, there were GIFs created simply using Apple's CoreGraphics library. This was called the "None" algorithm.

None

None

Then, eventually, dithering was discovered, but not fully understood.

Pre-3.3.1 Ordered

3.3 Ordered

@valyala
valyala / README.md
Last active September 1, 2024 20:40
Optimizing postgresql table for more than 100K inserts per second

Optimizing postgresql table for more than 100K inserts per second

  • Create UNLOGGED table. This reduces the amount of data written to persistent storage by up to 2x.
  • Set WITH (autovacuum_enabled=false) on the table. This saves CPU time and IO bandwidth on useless vacuuming of the table (since we never DELETE or UPDATE the table).
  • Insert rows with COPY FROM STDIN. This is the fastest possible approach to insert rows into table.
  • Minimize the number of indexes in the table, since they slow down inserts. Usually an index on time timestamp with time zone is enough.
  • Add synchronous_commit = off to postgresql.conf.
  • Use table inheritance for fast removal of old data:
@bomberstudios
bomberstudios / sketch-diff-in-git.md
Last active May 17, 2024 02:53
How to diff your .sketch files in Git

Using sketchtool to diff your .sketch files using text

Requirements

You need to have SketchTool installed somewhere in your path.

Setup

Add this in your ~/.gitconfig file (for some reason, it won't work in a local .gitconfig file):

@yurydelendik
yurydelendik / !wasmllvm.md
Last active September 15, 2024 09:15
Using WebAssembly in LLVM

NOTE: the content is out-of-date. All development is moved to the https://github.com/yurydelendik/wasmception

Using WebAssembly in LLVM

Compiling

# locations, e.g.
export WORKDIR=~/llvmwasm; mkdir -p $WORKDIR
export INSTALLDIR=$WORKDIR
@mokagio
mokagio / install-xcode-cli-tools.sh
Created September 9, 2015 09:28
Install Xcode CLI Tools without GUI
#!/bin/bash
# See http://apple.stackexchange.com/questions/107307/how-can-i-install-the-command-line-tools-completely-from-the-command-line
echo "Checking Xcode CLI tools"
# Only run if the tools are not installed yet
# To check that try to print the SDK path
xcode-select -p &> /dev/null
if [ $? -ne 0 ]; then
echo "Xcode CLI tools not found. Installing them..."
@Ashton-W
Ashton-W / Breakpoints_v2.xcbkptlist
Last active January 25, 2023 09:28
My User Breakpoints_v2.xcbkptlist
<?xml version="1.0" encoding="UTF-8"?>
<Bucket
type = "2"
version = "2.0">
<Breakpoints>
<!-- All Exceptions -->
<BreakpointProxy
BreakpointExtensionID = "Xcode.Breakpoint.ExceptionBreakpoint">
<BreakpointContent
@transitive-bullshit
transitive-bullshit / image-service.js
Last active September 16, 2024 04:35
Angular service to resize images with antialiasing for use with canvas.
angular.module('demo').service('imageService', function ($http, $q, $timeout) {
var NUM_LOBES = 3
var lanczos = lanczosGenerator(NUM_LOBES)
// resize via lanczos-sinc convolution
this.resize = function (img, width, height) {
var self = { }
self.type = "image/png"
self.quality = 1.0