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Base: Add -ftrivial-auto-var-init to man7/Mitigations.md

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Brian Gianforcaro 2022-07-08 15:37:59 -07:00
parent a813b941b8
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Notes: sideshowbarker 2024-07-17 09:35:02 +09:00
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Base/usr/share/man/man7/Mitigations.md
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@ -342,6 +342,24 @@ Date: Mon Mar 21 22:59:48 2022 +0200
Kernel: Add an extremely primitive version of KASLR
```
### Kernel -ftrivial-auto-var-init
As of GCC 12, both Clang and GCC now support the `-ftrivial-auto-var-init`
compiler flag. The flag will cause the compiler to automatically initialize
all variables to a pattern based on it's type. The goal being here is to
eradicate an entire bug class of issues that can originate from uninitialized
variables.
It was first enabled for the SerenityOS Kernel in the following [commit](https://github.com/SerenityOS/serenity/commit/458244c0c1c8f077030fa0d8964fad8d75c60d4a):
```
From 458244c0c1c8f077030fa0d8964fad8d75c60d4a Mon Sep 17 00:00:00 2001
From: Brian Gianforcaro <bgianf@serenityos.org>
Date: Fri, 24 Jun 2022 00:34:38 -0700
Kernel: Enable -ftrivial-auto-var-init as a security mitigation
```
## See also
* [`unveil`(2)](help://man/2/unveil)