diff options
| author |   Christoph Hellwig <hch@infradead.org> | 2011-11-20 15:35:32 +0000 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@suse.de> | 2012-01-12 11:40:12 -0800 |
| commit | 9ee3e4ab17e3670a46b24502394eb24d68a85f9b (patch) | |
| tree | b9cee644e1b1ac4cdf6e30ffd230e9da3aa3b43f | |
| parent | f09bb6a7bfda3642bcf94aa5da37bb2ea05bd3bd (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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -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 4c7b1450371..03aec610b3f 100644 --- a/fs/xfs/linux-2.6/xfs_acl.c +++ b/fs/xfs/linux-2.6/xfs_acl.c @@ -40,6 +40,8 @@ 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) |