Backport CVE-2020-24370's patch #16190
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I'm sorry to say but this backporting effort was partially unnecessary since Lua 5.3.6 has a fix for this bug/problem/CVE (RetroArch is currently on Lua 5.3.5 which is just one minor version behind), I did just check and the fix in 5.3.6 is identical to this pull request. |
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CVE-2020-24370 is a security vulnerability in lua. Although the CVE decription in CVE-2020-24370 said that this CVE only affected lua 5.4.0, according to lua this CVE actually existed since lua 5.2. The root cause of this CVE is the negation overflow that occurs when you try to take the negative of 0x80000000. Thus, this CVE also exists in RetroArch.
Try to backport the fix to the lua in RetroArch since the original fix is for 5.4 and several functions have been changed.