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Message-ID: <20221228172057.384bebbe.quinq@fifth.space>
Date: Wed, 28 Dec 2022 17:20:57 +0100
From: Quentin Rameau <quinq@...th.space>
To: musl@...ts.openwall.com
Subject: Re: Bug in swab
> > 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.
On top of that, it explicitly specifies:
“If copying takes place between objects that overlap, the behavior is undefined”
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