diff options
| author | Christoph Hellwig <hch@infradead.org> | 2011-11-20 15:35:32 +0000 |
|---|---|---|
| committer | Ben Myers <bpm@sgi.com> | 2011-11-28 22:14:24 -0600 |
| commit | fa8b18edd752a8b4e9d1ee2cd615b82c93cf8bba (patch) | |
| tree | 9765979df5cd3da5f7e7c54b6fcf47ae26486ec9 | |
| parent | c8891329131f791e0ddc422eaf6fc86e9a8cf8f5 (diff) | |
xfs: validate acl count
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>
| -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 b6c4b3795c4..76e4266d2e7 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) |