Patch "cifs: check MaxPathNameComponentLength != 0 before using it" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

    cifs: check MaxPathNameComponentLength != 0 before using it

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
cifs-check-maxpathnamecomponentlength-0-before-using-it.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Ronnie Sahlberg <[email protected]>
Date: Mon, 30 Oct 2017 13:28:03 +1100
Subject: cifs: check MaxPathNameComponentLength != 0 before using it

From: Ronnie Sahlberg <[email protected]>

commit f74bc7c6679200a4a83156bb89cbf6c229fe8ec0 upstream.

And fix tcon leak in error path.

---
 fs/cifs/dir.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

@@ -193,7 +193,8 @@ check_name(struct dentry *direntry, stru
 	struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
 	int i;
 
-	if (unlikely(direntry->d_name.len >
+	if (unlikely(tcon->fsAttrInfo.MaxPathNameComponentLength &&
+		     direntry->d_name.len >
 		     le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength)))
 		return -ENAMETOOLONG;
 

@@ -509,7 +510,7 @@ cifs_atomic_open(struct inode *inode, st
 
 	rc = check_name(direntry, tcon);
 	if (rc)
-		goto out_free_xid;
+		goto out;
 
 	server = tcon->ses->server;
 

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/cifs-check-maxpathnamecomponentlength-0-before-using-it.patch