Re: null pointer dereference in xfs_dir_isempty()

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Subject: Re: null pointer dereference in xfs_dir_isempty()
From: Eric Sandeen <sandeen@xxxxxxxxxxx>
Date: Sun, 26 Aug 2018 10:58:09 -0500
Cc: "Darrick J. Wong" <darrick.wong@xxxxxxxxxx>, Dave Chinner <david@xxxxxxxxxxxxx>
In-reply-to: <B0576452-CD35-40B4-ADA0-9385423B85C0@gatech.edu>
References: <B0576452-CD35-40B4-ADA0-9385423B85C0@gatech.edu>
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:52.0) Gecko/20100101 Thunderbird/52.9.1


On 8/24/18 9:06 AM, Xu, Wen wrote:
> Hi,
> 
> I found a new bug by fuzzing in upstream kernel.
> 
> Check details at: https://bugzilla.kernel.org/show_bug.cgi?id=200925
> 
> -Wen
> 

I think we need a size-vs-format check in xfs_ifork_verify_data, trying
that out now.

-Eric

References:
- null pointer dereference in xfs_dir_isempty()
  - From: Xu, Wen

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