linux-kernel - Re: [REGRESSION] Null pointer dereference while shrinking zswap

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <u4tzik2yfdn4eqtb2xc7ssmqsfozjblduu4znwuhlptivcfhza@wkvjsi73dtqt>
Date: Wed, 17 Apr 2024 00:29:06 +0200
From: Christian Heusel <christian@...sel.eu>
To: Nhat Pham <nphamcs@...il.com>
Cc: Seth Jennings <sjenning@...hat.com>, Dan Streetman <ddstreet@...e.org>, 
	Vitaly Wool <vitaly.wool@...sulko.com>, Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org, 
	linux-kernel@...r.kernel.org, David Runge <dave@...epmap.de>, 
	"Richard W.M. Jones" <rjones@...hat.com>, Mark W <instruform@...il.com>, regressions@...ts.linux.dev, 
	Johannes Weiner <hannes@...xchg.org>, Yosry Ahmed <yosryahmed@...gle.com>, 
	Chengming Zhou <chengming.zhou@...ux.dev>
Subject: Re: [REGRESSION] Null pointer dereference while shrinking zswap

On 24/04/16 03:14PM, Nhat Pham wrote:
> Is this one of the kernel versions that was broken? That looks a bit
> odd, as zswap shrinker landed on 6.8...

Yes that is the build at commit b5ba474f3f51 ("zswap: shrink zswap pool
based on memory pressure") which is one of the kernel versions that is
broken, although the version string seems a bit confusing. This is due
to the build script invoking "make -s kernelrelease" which gives the
following:

  $ git checkout b5ba474f3f51
  [...]
  $ make -s kernelrelease
  6.7.0-rc4-00158-gb5ba474f3f51

The commit is contained in v6.8+ only as you say, so its just confusing
in the version string:

  $ git tag --contains b5ba474f3f51 | grep -v next
  v6.8
  v6.8-rc1
  v6.8-rc2
  v6.8-rc3
  v6.8-rc4
  v6.8-rc5
  v6.8-rc6
  v6.8-rc7
  v6.9-rc1
  v6.9-rc2
  v6.9-rc3
  v6.9-rc4

Please see my initial report for the detailed bisection results and the
link there to the bisection log.

Cheers and thanks for looking into this!
Christian

Download attachment "signature.asc" of type "application/pgp-signature" (834 bytes)