Patch "thunderbolt: Fix memory leak in margining_port_remove()" has been added to the 6.6-stable tree

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

    thunderbolt: Fix memory leak in margining_port_remove()

to the 6.6-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:
     thunderbolt-fix-memory-leak-in-margining_port_remove.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From ac43c9122e4287bbdbe91e980fc2528acb72cc1e Mon Sep 17 00:00:00 2001
From: Yaxiong Tian <tianyaxiong@xxxxxxxxxx>
Date: Wed, 22 Nov 2023 16:02:43 +0800
Subject: thunderbolt: Fix memory leak in margining_port_remove()

From: Yaxiong Tian <tianyaxiong@xxxxxxxxxx>

commit ac43c9122e4287bbdbe91e980fc2528acb72cc1e upstream.

The dentry returned by debugfs_lookup() needs to be released by calling
dput() which is missing in margining_port_remove(). Fix this by calling
debugfs_lookup_and_remove() that combines both and avoids the memory leak.

Fixes: d0f1e0c2a699 ("thunderbolt: Add support for receiver lane margining")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Yaxiong Tian <tianyaxiong@xxxxxxxxxx>
Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/thunderbolt/debugfs.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/thunderbolt/debugfs.c
+++ b/drivers/thunderbolt/debugfs.c
@@ -959,7 +959,7 @@ static void margining_port_remove(struct
 	snprintf(dir_name, sizeof(dir_name), "port%d", port->port);
 	parent = debugfs_lookup(dir_name, port->sw->debugfs_dir);
 	if (parent)
-		debugfs_remove_recursive(debugfs_lookup("margining", parent));
+		debugfs_lookup_and_remove("margining", parent);
 
 	kfree(port->usb4->margining);
 	port->usb4->margining = NULL;


Patches currently in stable-queue which might be from tianyaxiong@xxxxxxxxxx are

queue-6.6/thunderbolt-fix-memory-leak-in-margining_port_remove.patch




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