diff options
| author | Christoph Hellwig <hch@infradead.org> | 2011-12-06 16:21:05 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-12-09 08:52:46 -0800 |
| commit | a980e5dccb3ff8cb8f77ff27264b13837958119d (patch) | |
| tree | 2facb9fe2c6fb8f05031f50aa2abea10aeab61bd /fs | |
| parent | ee6dfa64be0c1e8976f20246278121bc9fcf1a24 (diff) | |
xfs: validate acl count
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@lst.de>
Signed-off-by: Ben Myers <bpm@sgi.com>
Acked-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_acl.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/xfs/linux-2.6/xfs_acl.c b/fs/xfs/linux-2.6/xfs_acl.c index 39f4f809bb68..4b9fb915d445 100644 --- 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) |