Patch "USB: fix memory leak with using debugfs_lookup()" has been added to the 5.15-stable tree

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

    USB: fix memory leak with using debugfs_lookup()

to the 5.15-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:
     usb-fix-memory-leak-with-using-debugfs_lookup.patch
and it can be found in the queue-5.15 subdirectory.

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



commit ad3fb94ba7019fa9426277f00ee87f670944729f
Author: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Date:   Fri Jan 6 16:28:28 2023 +0100

    USB: fix memory leak with using debugfs_lookup()
    
    [ Upstream commit 30374434edab20e25776f8ecb4bc9d1e54309487 ]
    
    When calling debugfs_lookup() the result must have dput() called on it,
    otherwise the memory will leak over time.  To make things simpler, just
    call debugfs_lookup_and_remove() instead which handles all of the logic at
    once.
    
    Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
    Cc: Jilin Yuan <yuanjilin@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20230106152828.3790902-1-gregkh@xxxxxxxxxxxxxxxxxxx
    Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 62368c4ed37af..cc36f9f228148 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -1036,7 +1036,7 @@ static void usb_debugfs_init(void)
 
 static void usb_debugfs_cleanup(void)
 {
-	debugfs_remove(debugfs_lookup("devices", usb_debug_root));
+	debugfs_lookup_and_remove("devices", usb_debug_root);
 }
 
 /*



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