X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=kernel%2Fcred.c;h=ff8606f77d901d4ed1201d35d35feaa5066821e3;hb=ad7c1399b7d0c6788b8f5fdb5c274110f3ce6017;hp=71179a09c1d6a3240fd9c1a4ead58d89646da24e;hpb=7168e947291f0ead07e5638b4599fb7845288b69;p=firefly-linux-kernel-4.4.55.git

diff --git a/kernel/cred.c b/kernel/cred.c
index 71179a09c1d6..ff8606f77d90 100644
--- a/kernel/cred.c
+++ b/kernel/cred.c
@@ -689,6 +689,8 @@ EXPORT_SYMBOL(set_security_override_from_ctx);
  */
 int set_create_files_as(struct cred *new, struct inode *inode)
 {
+	if (!uid_valid(inode->i_uid) || !gid_valid(inode->i_gid))
+		return -EINVAL;
 	new->fsuid = inode->i_uid;
 	new->fsgid = inode->i_gid;
 	return security_kernel_create_files_as(new, inode);