From: David Sterba <dsterba@suse.cz>
To: Qu Wenruo <quwenruo.btrfs@gmx.com>
Cc: David Sterba <dsterba@suse.com>,
torvalds@linux-foundation.org, clm@fb.com,
linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [GIT PULL] Btrfs changes for 4.15
Date: Tue, 14 Nov 2017 15:50:26 +0100 [thread overview]
Message-ID: <20171114145026.GE28899@twin.jikos.cz> (raw)
In-Reply-To: <abc907f7-b4de-c999-95cd-b241589a5305@gmx.com>
On Tue, Nov 14, 2017 at 07:39:11AM +0800, Qu Wenruo wrote:
> > - extend mount options to specify zlib compression level, -o compress=zlib:9
>
> However the support for it has a big problem, it will cause wild memory
> access for "-o compress" mount option.
>
> Kernel ASAN can detect it easily and we already have user report about
> it. Btrfs/026 could also easily trigger it.
>
> The fixing patch is submitted some days ago:
> https://patchwork.kernel.org/patch/10042553/
>
> And the default compression level when not specified is zero, which
> means no compression but directly memory copy.
This fix will go in next pull request. Thanks.
next prev parent reply other threads:[~2017-11-14 14:52 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-13 15:35 David Sterba
2017-11-13 23:39 ` Qu Wenruo
2017-11-14 14:50 ` David Sterba [this message]
2017-11-15 19:59 ` Duncan
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