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path: root/kernel/fs/xfs/xfs_acl.c
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Diffstat (limited to 'kernel/fs/xfs/xfs_acl.c')
-rw-r--r--kernel/fs/xfs/xfs_acl.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/kernel/fs/xfs/xfs_acl.c b/kernel/fs/xfs/xfs_acl.c
index 4b641676f..6bb470fbb 100644
--- a/kernel/fs/xfs/xfs_acl.c
+++ b/kernel/fs/xfs/xfs_acl.c
@@ -37,16 +37,19 @@
STATIC struct posix_acl *
xfs_acl_from_disk(
- struct xfs_acl *aclp,
- int max_entries)
+ const struct xfs_acl *aclp,
+ int len,
+ int max_entries)
{
struct posix_acl_entry *acl_e;
struct posix_acl *acl;
- struct xfs_acl_entry *ace;
+ const struct xfs_acl_entry *ace;
unsigned int count, i;
+ if (len < sizeof(*aclp))
+ return ERR_PTR(-EFSCORRUPTED);
count = be32_to_cpu(aclp->acl_cnt);
- if (count > max_entries)
+ if (count > max_entries || XFS_ACL_SIZE(count) != len)
return ERR_PTR(-EFSCORRUPTED);
acl = posix_acl_alloc(count, GFP_KERNEL);
@@ -160,10 +163,11 @@ xfs_get_acl(struct inode *inode, int type)
*/
if (error == -ENOATTR)
goto out_update_cache;
+ acl = ERR_PTR(error);
goto out;
}
- acl = xfs_acl_from_disk(xfs_acl, XFS_ACL_MAX_ENTRIES(ip->i_mount));
+ acl = xfs_acl_from_disk(xfs_acl, len, XFS_ACL_MAX_ENTRIES(ip->i_mount));
if (IS_ERR(acl))
goto out;