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Message-Id: <20111207160828.239796453@clark.kroah.org> Date: Wed, 07 Dec 2011 08:07:29 -0800 From: Greg KH <gregkh@...e.de> To: <linux-kernel@...r.kernel.org>, <stable@...r.kernel.org> Cc: <torvalds@...ux-foundation.org>, <akpm@...ux-foundation.org>, <alan@...rguk.ukuu.org.uk>, xfs@....sgi.com, Christoph Hellwig <hch@....de>, Ben Myers <bpm@....com>, Dave Chinner <dchinner@...hat.com> Subject: [69/80] xfs: validate acl count 3.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Christoph Hellwig <hch@...radead.org> commit fa8b18edd752a8b4e9d1ee2cd615b82c93cf8bba upstream. This prevents in-memory corruption and possible panics if the on-disk ACL is badly corrupted. Signed-off-by: Christoph Hellwig <hch@....de> Signed-off-by: Ben Myers <bpm@....com> Acked-by: Dave Chinner <dchinner@...hat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de> --- fs/xfs/linux-2.6/xfs_acl.c | 2 ++ 1 file changed, 2 insertions(+) --- a/fs/xfs/linux-2.6/xfs_acl.c +++ b/fs/xfs/linux-2.6/xfs_acl.c @@ -42,6 +42,8 @@ xfs_acl_from_disk(struct xfs_acl *aclp) int count, i; count = be32_to_cpu(aclp->acl_cnt); + if (count > XFS_ACL_MAX_ENTRIES) + return ERR_PTR(-EFSCORRUPTED); acl = posix_acl_alloc(count, GFP_KERNEL); if (!acl) -- 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/
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