linux-kernel - Re: [REGRESSION][BISECTED] erroneous buffer overflow detected in bch2_xattr

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Message-ID: <Zv6YInHiwjLeBC3D@archlinux>
Date: Thu, 3 Oct 2024 15:12:02 +0200
From: Jan Hendrik Farr <kernel@...rr.cc>
To: Thorsten Blum <thorsten.blum@...lux.com>
Cc: Kees Cook <kees@...nel.org>, kent.overstreet@...ux.dev,
	regressions@...ts.linux.dev, linux-bcachefs@...r.kernel.org,
	linux-hardening@...r.kernel.org, linux-kernel@...r.kernel.org,
	ardb@...nel.org, morbo@...gle.com
Subject: Re: [REGRESSION][BISECTED] erroneous buffer overflow detected in
 bch2_xattr_validate

On 03 15:07:52, Thorsten Blum wrote:
> On 3. Oct 2024, at 13:33, Jan Hendrik Farr <kernel@...rr.cc> wrote:
> >> [...]
> > 
> > This issue is now fixed on the llvm main branch:
> > https://github.com/llvm/llvm-project/commit/882457a2eedbe6d53161b2f78fcf769fc9a93e8a
> 
> Thanks!
> 
> Do you know if it also fixes the different sizes here:
> https://godbolt.org/z/vvK9PE1Yq

Unfortunately this still prints 36.

> 
> I ran out of disk space when compiling llvm :0
> 
> > So presumably this will go into 19.1.2, not sure what this means for
> > distros that ship clang 18. Will they have to be notified to backport
> > this?
> > 
> > Best Regards
> > Jan