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thunderbolt: Fix memory leak in margining_port_remove() 

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: d0f1e0c2a6 ("thunderbolt: Add support for receiver lane margining")
Cc: stable@vger.kernel.org
Signed-off-by: Yaxiong Tian <tianyaxiong@kylinos.cn>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yaxiong Tian 2023-11-22 16:02:43 +08:00 committed by Greg Kroah-Hartman
parent 50ae1c4704
commit 6fbaeffc3a
1 changed files with 1 additions and 1 deletions
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2
drivers/thunderbolt/debugfs.c
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@ -959,7 +959,7 @@ static void margining_port_remove(struct tb_port *port)
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;