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=-6.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,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 B727FC10F0E for ; Mon, 15 Apr 2019 18:47:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 79AA9218EA for ; Mon, 15 Apr 2019 18:47:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1555354079; bh=Z+0BH9rrIJ2/xEPwPe5vRIkDigzEUH1mKpbqEuDS2NU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=GFsSWb3Lqg7fGW25ibG2JRnfzQEbveqICttO30rsmI8jWtBwfdgI/GtZ/naYz+VGr jsSWUoZ8oxqlPsf0w6z8jV/C17o1t1p0kQ+6MyJnGv9eszGEe/W56F8Pupniypgt4j X5qTsbd3R/waw495ow3U03U0+BRpMOi/ChHJXKAo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729025AbfDOSr6 (ORCPT ); Mon, 15 Apr 2019 14:47:58 -0400 Received: from mail.kernel.org ([198.145.29.99]:51600 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728992AbfDOSrz (ORCPT ); Mon, 15 Apr 2019 14:47:55 -0400 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 14996218EA; Mon, 15 Apr 2019 18:47:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1555354074; bh=Z+0BH9rrIJ2/xEPwPe5vRIkDigzEUH1mKpbqEuDS2NU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lfPL0eyLnhwm5KAvIcoDJ1RjDs7rsZgAZqf97+hU/CWSlxryZwwfUsXTFsMSXmVrs 1kZqx/7SjqfM93QtB38H1eaAES5idxmdx4AxXfnP89SN12FTj/0bLQw72HiFePmpJG x0WwPm9iidWt2jnaBI3Y27v+P6xQApz33AFHAVzs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Zubin Mithra , Guenter Roeck , Takashi Iwai Subject: [PATCH 4.9 63/76] ALSA: seq: Fix OOB-reads from strlcpy Date: Mon, 15 Apr 2019 20:44:27 +0200 Message-Id: <20190415183725.660783720@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190415183707.712011689@linuxfoundation.org> References: <20190415183707.712011689@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: Zubin Mithra commit 212ac181c158c09038c474ba68068be49caecebb upstream. When ioctl calls are made with non-null-terminated userspace strings, strlcpy causes an OOB-read from within strlen. Fix by changing to use strscpy instead. Signed-off-by: Zubin Mithra Reviewed-by: Guenter Roeck Cc: Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/core/seq/seq_clientmgr.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/sound/core/seq/seq_clientmgr.c +++ b/sound/core/seq/seq_clientmgr.c @@ -1249,7 +1249,7 @@ static int snd_seq_ioctl_set_client_info /* fill the info fields */ if (client_info->name[0]) - strlcpy(client->name, client_info->name, sizeof(client->name)); + strscpy(client->name, client_info->name, sizeof(client->name)); client->filter = client_info->filter; client->event_lost = client_info->event_lost; @@ -1527,7 +1527,7 @@ static int snd_seq_ioctl_create_queue(st /* set queue name */ if (!info->name[0]) snprintf(info->name, sizeof(info->name), "Queue-%d", q->queue); - strlcpy(q->name, info->name, sizeof(q->name)); + strscpy(q->name, info->name, sizeof(q->name)); snd_use_lock_free(&q->use_lock); return 0; @@ -1589,7 +1589,7 @@ static int snd_seq_ioctl_set_queue_info( queuefree(q); return -EPERM; } - strlcpy(q->name, info->name, sizeof(q->name)); + strscpy(q->name, info->name, sizeof(q->name)); queuefree(q); return 0;