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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 65237C432C3 for ; Wed, 27 Nov 2019 21:44:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2DFA920870 for ; Wed, 27 Nov 2019 21:44:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574891080; bh=tOajLgzf+6n6vOATerHhVPn4sqkI079tnrqMck6Rxzg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=M2Yy8PzToKlFGSFCYVUN/UQnTlF/GIEpJreitTiMG2qYQsG2r3MS/E1Id5sKDa78W MxzWq/7rGB5AjuKUGHCfjwVQYQv8VLANAJEwwM/mVI2g2uewXgU8SBWOdbCL6cm5V7 Mrrj3jH3eLIRK4mLoX7txxTJt5I9x8QQA1DModqc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728503AbfK0UhH (ORCPT ); Wed, 27 Nov 2019 15:37:07 -0500 Received: from mail.kernel.org ([198.145.29.99]:39812 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728492AbfK0UhD (ORCPT ); Wed, 27 Nov 2019 15:37:03 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 9DC6921569; Wed, 27 Nov 2019 20:37:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574887023; bh=tOajLgzf+6n6vOATerHhVPn4sqkI079tnrqMck6Rxzg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UTzSsJYsfe7p8lfKO0xuIxgngMxWI/DiOrEZJGnV13vaKuLffARyyi2CT1oJBa2TD BAIbqUZVV/IizUZqftYN8uNRpZVvvCLhQZsejg7j6reOacR9i2I43arXFJTJhAC0Pr 7X85UdyWxwhw63lS12RRXKhi50qkWoAQiaaTFW8w= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , Kalle Valo , Sasha Levin Subject: [PATCH 4.4 084/132] wireless: airo: potential buffer overflow in sprintf() Date: Wed, 27 Nov 2019 21:31:15 +0100 Message-Id: <20191127203014.057638468@linuxfoundation.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191127202857.270233486@linuxfoundation.org> References: <20191127202857.270233486@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dan Carpenter [ Upstream commit 3d39e1bb1c88f32820c5f9271f2c8c2fb9a52bac ] It looks like we wanted to print a maximum of BSSList_rid.ssidLen bytes of the ssid, but we accidentally use "%*s" (width) instead of "%.*s" (precision) so if the ssid doesn't have a NUL terminator this could lead to an overflow. Static analysis. Not tested. Fixes: e174961ca1a0 ("net: convert print_mac to %pM") Signed-off-by: Dan Carpenter Signed-off-by: Kalle Valo Signed-off-by: Sasha Levin --- drivers/net/wireless/airo.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/airo.c b/drivers/net/wireless/airo.c index 17c40f06f13e5..82d24f2b9c190 100644 --- a/drivers/net/wireless/airo.c +++ b/drivers/net/wireless/airo.c @@ -5484,7 +5484,7 @@ static int proc_BSSList_open( struct inode *inode, struct file *file ) { we have to add a spin lock... */ rc = readBSSListRid(ai, doLoseSync, &BSSList_rid); while(rc == 0 && BSSList_rid.index != cpu_to_le16(0xffff)) { - ptr += sprintf(ptr, "%pM %*s rssi = %d", + ptr += sprintf(ptr, "%pM %.*s rssi = %d", BSSList_rid.bssid, (int)BSSList_rid.ssidLen, BSSList_rid.ssid, -- 2.20.1