linux-kernel - Re: [BLOCK] bh: Ensure bh fits within a page

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: <20060801050259.GA3126@gondor.apana.org.au>
Date:	Tue, 1 Aug 2006 15:02:59 +1000
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Andrew Morton <akpm@...l.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [BLOCK] bh: Ensure bh fits within a page

On Mon, Jul 31, 2006 at 09:04:18PM -0700, Andrew Morton wrote:
> 
> Could we have a more detailed description?

Sure, this particular instance is in journal_write_metadata_buffer
where the bh may be constructed from kmalloc memory (search for the
call to jbd_rep_kmalloc).  Because the memory returned by kmalloc
may straddle a page (when slab debugging is enabled that is), this
causes a broken bh to be injected into submit_bh.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/