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 54CA515CAC for ; Tue, 8 Nov 2022 13:52:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 87FD6C433D6; Tue, 8 Nov 2022 13:52:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1667915560; bh=mP28hgTECRkM7eRlw0Ihu4xzwRxs2xy0goivN0V1pp4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TLM/cuhojq0oFH3yOpOIMhM19h5/e/j1LmgpIcUKwiyG7bYXkmtM5ij83jLKM0RyJ NRIiXPMm7qopPZuZZ3ghCB7yL26rEwH9HPBwBSMn4Ed9j7bgsDa/oGC0sQqsWA9+97 W5EE67hnT3/X0ttPg8JhekxlESgHCRpmMWvO/GI8= 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 5.10 025/118] nfc: nxp-nci: Fix potential memory leak in nxp_nci_send() Date: Tue, 8 Nov 2022 14:38:23 +0100 Message-Id: <20221108133341.754151632@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221108133340.718216105@linuxfoundation.org> References: <20221108133340.718216105@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: Shang XiaoJing [ Upstream commit 7bf1ed6aff0f70434bd0cdd45495e83f1dffb551 ] nxp_nci_send() will call nxp_nci_i2c_write(), and only free skb when nxp_nci_i2c_write() failed. However, even if the nxp_nci_i2c_write() run succeeds, the skb will not be freed in nxp_nci_i2c_write(). As the result, the skb will memleak. nxp_nci_send() should also free the skb when nxp_nci_i2c_write() succeeds. Fixes: dece45855a8b ("NFC: nxp-nci: Add support for NXP NCI chips") Signed-off-by: Shang XiaoJing Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/nfc/nxp-nci/core.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/nfc/nxp-nci/core.c b/drivers/nfc/nxp-nci/core.c index 2b0c7232e91f..b68b315689c3 100644 --- a/drivers/nfc/nxp-nci/core.c +++ b/drivers/nfc/nxp-nci/core.c @@ -77,10 +77,13 @@ static int nxp_nci_send(struct nci_dev *ndev, struct sk_buff *skb) return -EINVAL; r = info->phy_ops->write(info->phy_id, skb); - if (r < 0) + if (r < 0) { kfree_skb(skb); + return r; + } - return r; + consume_skb(skb); + return 0; } static struct nci_ops nxp_nci_ops = { -- 2.35.1