From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BFCB1882C for ; Fri, 10 Mar 2023 15:15:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3E93CC4339C; Fri, 10 Mar 2023 15:15:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678461344; bh=FCr71OfqrNuYpQWh1uNDAto1H/RXTFO0WbB5oEKU0aE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lH/OokUkcZb2LlpTFKJdDw0N1mGHgHe91cK2ZmV4Jo06iev64q4Z1GKXrLjdehumI unoPTIIIXiPGQvxynJoL3zoWuMWfIbBnvbBCurJZCKzn+vYcViOZoYir76kmXCqD05 coM9GYlW7NRIUG/XWjzOdEcvGhsNbCQ6qfckYc9Q= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Daniel Mack , Haojian Zhuang , Robert Jarzmik , Sasha Levin Subject: [PATCH 5.15 107/136] USB: gadget: pxa27x_udc: fix memory leak with using debugfs_lookup() Date: Fri, 10 Mar 2023 14:43:49 +0100 Message-Id: <20230310133710.391731405@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230310133706.811226272@linuxfoundation.org> References: <20230310133706.811226272@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Greg Kroah-Hartman [ Upstream commit 7a6952fa0366d4408eb8695af1a0578c39ec718a ] 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: Daniel Mack Cc: Haojian Zhuang Cc: Robert Jarzmik Link: https://lore.kernel.org/r/20230202153235.2412790-12-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/gadget/udc/pxa27x_udc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/gadget/udc/pxa27x_udc.c b/drivers/usb/gadget/udc/pxa27x_udc.c index f4b7a2a3e7114..282b114f382f8 100644 --- a/drivers/usb/gadget/udc/pxa27x_udc.c +++ b/drivers/usb/gadget/udc/pxa27x_udc.c @@ -215,7 +215,7 @@ static void pxa_init_debugfs(struct pxa_udc *udc) static void pxa_cleanup_debugfs(struct pxa_udc *udc) { - debugfs_remove(debugfs_lookup(udc->gadget.name, usb_debug_root)); + debugfs_lookup_and_remove(udc->gadget.name, usb_debug_root); } #else -- 2.39.2