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Date: Thu, 29 Dec 2022 10:50:34 +0100
From: "Alex Xu (Hello71)" <alex_y_xu@...oo.ca>
To: musl@...ts.openwall.com
Subject: Re: Bug in swab
Excerpts from NRK's message of December 28, 2022 1:06 pm:
> On Wed, Dec 28, 2022 at 05:01:53PM +0530, Bugs Reporter wrote:
>> This should also work for coinciding memories
>> and musl's implementation does not take that into account.
>
> The POSIX manpage declares the prototype of swab(3p) with the `restrict`
> qualifier [0]. So calling this function with overlapping memory region is
> not correct - the bug is in the calling code.
>
> [0]: https://man7.org/linux/man-pages/man3/swab.3p.html
>
> - NRK
>
Actually, the originally linked
https://man7.org/linux/man-pages/man3/swab.3.html also uses restrict. It
was added in 2021:
https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/commit/man3/swab.3?id=cd2b76c7dc4a607d952f1ae77fdee2dd7dc9c3dc.
Cheers,
Alex.
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