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 021E015CAD for ; Tue, 8 Nov 2022 13:59:42 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2A63EC433D6; Tue, 8 Nov 2022 13:59:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1667915982; bh=4yE1MVS7AlY2X1X9s/Hdo6H9L2GTHOLKaxeTSIVKFg0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TpuQCnDmF3DvJF2nGlHR+Lwiz/dnfVMAxpCn2QliSLmqMq90I4PzjY2pZ1X9H2xHU GWoaPu5ft93AJz/WjniIMTDpUOTYBbzFx0btuUu/vUcTsxweJOOKPDCxCvJkugODq+ Vd4TFvmbVwffPkMepoB/KFYN9UDLdSKmrocFadDc= 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 5.15 028/144] nfc: fdp: Fix potential memory leak in fdp_nci_send() Date: Tue, 8 Nov 2022 14:38:25 +0100 Message-Id: <20221108133346.471564973@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221108133345.346704162@linuxfoundation.org> References: <20221108133345.346704162@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 8e4aae6b8ca76afb1fb64dcb24be44ba814e7f8a ] fdp_nci_send() will call fdp_nci_i2c_write that will not free skb in the function. As a result, when fdp_nci_i2c_write() finished, the skb will memleak. fdp_nci_send() should free skb after fdp_nci_i2c_write() finished. Fixes: a06347c04c13 ("NFC: Add Intel Fields Peak NFC solution driver") Signed-off-by: Shang XiaoJing Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/nfc/fdp/fdp.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/nfc/fdp/fdp.c b/drivers/nfc/fdp/fdp.c index c6b3334f24c9..f12f903a9dd1 100644 --- a/drivers/nfc/fdp/fdp.c +++ b/drivers/nfc/fdp/fdp.c @@ -249,11 +249,19 @@ static int fdp_nci_close(struct nci_dev *ndev) static int fdp_nci_send(struct nci_dev *ndev, struct sk_buff *skb) { struct fdp_nci_info *info = nci_get_drvdata(ndev); + int ret; if (atomic_dec_and_test(&info->data_pkt_counter)) info->data_pkt_counter_cb(ndev); - return info->phy_ops->write(info->phy, skb); + ret = info->phy_ops->write(info->phy, skb); + if (ret < 0) { + kfree_skb(skb); + return ret; + } + + consume_skb(skb); + return 0; } static int fdp_nci_request_firmware(struct nci_dev *ndev) -- 2.35.1