xfs: verify free block header fields

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commit de14c5f541 upstream.

Perform basic sanity checking of the directory free block header
fields so that we avoid hanging the system on invalid data.

(Granted that just means that now we shutdown on directory write,
but that seems better than hanging...)

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Darrick J. Wong 2017-02-02 15:14:00 -08:00 • committed by Greg Kroah-Hartman

parent 4056a74aaf

commit 3d2bd2fd5c

1 changed files with 49 additions and 2 deletions

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fs/xfs/libxfs/xfs_dir2_node.c

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