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 11:33:46 -0800 |
| commit | 1820b28c96690ab8bc8977089d8eb4a9e7128117 (patch) | |
| tree | 85ade20c62c632d547b626d0147896e6272d2055 | |
| parent | 53b63616b396f49775d4b2c4c3e6eab648a7833b (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/xfs_acl.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c index b6c4b3795c4a..76e4266d2e7e 100644 --- a/fs/xfs/xfs_acl.c +++ b/fs/xfs/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) |