From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2F4C9C433FE for ; Tue, 8 Nov 2022 13:41:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233702AbiKHNle (ORCPT ); Tue, 8 Nov 2022 08:41:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39462 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234096AbiKHNlT (ORCPT ); Tue, 8 Nov 2022 08:41:19 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 853514FFB1 for ; Tue, 8 Nov 2022 05:41:12 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 35A55B81AF1 for ; Tue, 8 Nov 2022 13:41:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3412EC433D6; Tue, 8 Nov 2022 13:41:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1667914869; bh=cHRPvFdv9KZoP/+MEMR61Xwze9P3ECNAtVssDDxevWU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QhZt1u8gLf0WpkUSfj4MkyJY56+mxxK9ix4krQHUqR4cC8Fllefn6861YnTM3ZYbg 5cpmtfp/UNtTdvvvlIJ7QqGuOhMpcSqQaN1vx7JOQWALGc2NTtW7Et6J1bhDp6UQRb GZgegVFPUS6TJWj6gQ/YEEJhv2421QElRPtMyYVU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Shang XiaoJing , "David S. Miller" , Sasha Levin Subject: [PATCH 4.9 05/30] nfc: nfcmrvl: Fix potential memory leak in nfcmrvl_i2c_nci_send() Date: Tue, 8 Nov 2022 14:38:53 +0100 Message-Id: <20221108133326.902997533@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221108133326.715586431@linuxfoundation.org> References: <20221108133326.715586431@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Shang XiaoJing [ Upstream commit 93d904a734a74c54d945a9884b4962977f1176cd ] nfcmrvl_i2c_nci_send() will be called by nfcmrvl_nci_send(), and skb should be freed in nfcmrvl_i2c_nci_send(). However, nfcmrvl_nci_send() will only free skb when i2c_master_send() return >=0, which means skb will memleak when i2c_master_send() failed. Free skb no matter whether i2c_master_send() succeeds. Fixes: b5b3e23e4cac ("NFC: nfcmrvl: add i2c driver") Signed-off-by: Shang XiaoJing Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/nfc/nfcmrvl/i2c.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/nfc/nfcmrvl/i2c.c b/drivers/nfc/nfcmrvl/i2c.c index bb546cabe809..91d7ef11aba3 100644 --- a/drivers/nfc/nfcmrvl/i2c.c +++ b/drivers/nfc/nfcmrvl/i2c.c @@ -151,10 +151,15 @@ static int nfcmrvl_i2c_nci_send(struct nfcmrvl_private *priv, ret = -EREMOTEIO; } else ret = 0; + } + + if (ret) { kfree_skb(skb); + return ret; } - return ret; + consume_skb(skb); + return 0; } static void nfcmrvl_i2c_nci_update_config(struct nfcmrvl_private *priv, -- 2.35.1