From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-usb@vger.kernel.org
Cc: linux-kernel@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Alan Stern <stern@rowland.harvard.edu>,
Jilin Yuan <yuanjilin@cdjrlc.com>
Subject: [PATCH] USB: fix memory leak with using debugfs_lookup()
Date: Fri, 6 Jan 2023 16:28:28 +0100 [thread overview]
Message-ID: <20230106152828.3790902-1-gregkh@linuxfoundation.org> (raw)
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@rowland.harvard.edu>
Cc: Jilin Yuan <yuanjilin@cdjrlc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/core/usb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 11b15d7b357a..a415206cab04 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -998,7 +998,7 @@ 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);
}
/*
--
2.39.0
reply other threads:[~2023-01-06 15:28 UTC|newest]
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