On Nov 23, 2024, at 05:24, ToddAndMargo via users
<[email protected]> wrote:
>
> Hi All,
>
> I just watched a youtube video on mseal, memory corruptions
> by hacker,s and the Linux kernel.
>
> I do not believe much of what I see on youtube. Is mseal
> real and if so, will we be seeing it soon?
It’s funny, the way you talk about it I’d guess it was an exploit of some sort,
but it looks like the “mseal()” syscall was introduced in the 6.10 kernel to
MITIGATE exploits.
A quick search on the internet (not YouTube) gave me an idea of what it is.
It’s a new syscall to mitigate (or prevent) attacks on a process’s memory. It
was introduced by a Google engineer to improve Chromium security but it
obviously is something that glibc has taken advantage of and will benefit many
more things.
Official kernel documentation:
https://docs.kernel.org/userspace-api/mseal.html
The commit:
https://lwn.net/Articles/954936/
A blog post about it:
https://blog.trailofbits.com/2024/10/25/a-deep-dive-into-linuxs-new-mseal-syscall/
I rarely search YouTube to learn about tech things like this. Sites like LWN
and Phoronix often discuss these kinds of things, maybe start there next time.
Don’t use generative AI at all to learn, either.
--
Jonathan Billings
--
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