1 files changed, 10 insertions, 0 deletions

diff --git a/fs/udf/file.c b/fs/udf/file.c
index 356c2bf148a5..cd31e4f6d6da 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -257,12 +257,22 @@ const struct file_operations udf_file_operations = {
 static int udf_setattr(struct dentry *dentry, struct iattr *attr)
 {
         struct inode *inode = d_inode(dentry);
+        struct super_block *sb = inode->i_sb;
         int error;
 
         error = setattr_prepare(dentry, attr);
         if (error)
                 return error;
 
+        if ((attr->ia_valid & ATTR_UID) &&
+            UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET) &&
+            !uid_eq(attr->ia_uid, UDF_SB(sb)->s_uid))
+                return -EPERM;
+        if ((attr->ia_valid & ATTR_GID) &&
+            UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET) &&
+            !gid_eq(attr->ia_gid, UDF_SB(sb)->s_gid))
+                return -EPERM;
+
         if ((attr->ia_valid & ATTR_SIZE) &&
             attr->ia_size != i_size_read(inode)) {
                 error = udf_setsize(inode, attr->ia_size);