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Date: Sun, 25 Feb 2024 20:30:56 -0500
From: Rich Felker <dalias@...c.org>
To: Markus Wichmann <nullplan@....net>
Cc: musl@...ts.openwall.com, Anuraag Agrawal <anuraaga@...il.com>
Subject: Re: Large overflow in __intscan ignored
On Sat, Dec 02, 2023 at 11:29:41AM -0500, Rich Felker wrote:
> On Sat, Dec 02, 2023 at 09:48:58AM +0100, Markus Wichmann wrote:
> > Am Sat, Dec 02, 2023 at 10:42:11AM +0900 schrieb Anuraag Agrawal:
> > > Hello,
> > >
> > > Thanks for checking and very sorry for the noise, I didn't read the loop
> > > condition correctly. I am using Webassembly so the issue must be specific
> > > to it somehow. I will report on wasi-libc to follow up.
> > >
> > > Thanks,
> >
> > Don't worry about it. The only way I see this could overflow is if
> > ULLONG_MAX is not the correct limit for what the compiler implements as
> > "unsigned long long". Though I don't see how that could be, since musl
> > defines ULLONG_MAX as the minimum value the type can have according to
> > the C standard.
> >
> > Or else, of course, maybe the compiler's implementation of 64-bit
> > multiplication is broken.
>
> Ouch, sounds like this is going to be some sort of big wasm bug...
Was this bug ever reported/tracked-down/fixed on the wasm side?
Rich
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