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Message-ID: <20231202162941.GC4163@brightrain.aerifal.cx>
Date: Sat, 2 Dec 2023 11:29:41 -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 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...
Rich
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