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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,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 4652BC4740C for ; Sun, 22 Sep 2019 19:30:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 153322184D for ; Sun, 22 Sep 2019 19:30:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569180606; bh=3vz0jGokF/tADKiAtasvrTU/In2SROOiBNXQon2ojrc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=udaVX9uxiibVjiq05LEw9HG/BoFwtA1gItL9EpmAMPeyaKrR+uP1yV4fIAaO+GwRE roP8hn135GlE78yJPjo9HINNUXAH8/9M/nckLTpE7rG7fw5aY2Xlt+M8EMk/GpAedT e1IsjaNhG8plevY30GotAg6HomHgmQNy4SLcMLrg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392354AbfIVSt2 (ORCPT ); Sun, 22 Sep 2019 14:49:28 -0400 Received: from mail.kernel.org ([198.145.29.99]:46108 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2392024AbfIVStH (ORCPT ); Sun, 22 Sep 2019 14:49:07 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id ABB7421479; Sun, 22 Sep 2019 18:49:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569178146; bh=3vz0jGokF/tADKiAtasvrTU/In2SROOiBNXQon2ojrc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Xq153oXOi7DhKNjj+BkRCZ7vvF+wbQr3SMIkkALfm5y0J4mz4FdP9o8FW0FPpi6EE MKgYib18JfwtcY9ATtkNo1V2O+xehaMcxIhoDIluxJ5VUEdWO1JF5Y4YLv29A4or7b nti6D/rG7rTqDiKORHzvBj/gwinc1gukxL3ySwI4= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Tomas Bortoli , syzbot+0522702e9d67142379f1@syzkaller.appspotmail.com, Sean Young , Mauro Carvalho Chehab , Sasha Levin , linux-media@vger.kernel.org Subject: [PATCH AUTOSEL 5.3 194/203] media: ttusb-dec: Fix info-leak in ttusb_dec_send_command() Date: Sun, 22 Sep 2019 14:43:40 -0400 Message-Id: <20190922184350.30563-194-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190922184350.30563-1-sashal@kernel.org> References: <20190922184350.30563-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Tomas Bortoli [ Upstream commit a10feaf8c464c3f9cfdd3a8a7ce17e1c0d498da1 ] The function at issue does not always initialize each byte allocated for 'b' and can therefore leak uninitialized memory to a USB device in the call to usb_bulk_msg() Use kzalloc() instead of kmalloc() Signed-off-by: Tomas Bortoli Reported-by: syzbot+0522702e9d67142379f1@syzkaller.appspotmail.com Signed-off-by: Sean Young Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/usb/ttusb-dec/ttusb_dec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/usb/ttusb-dec/ttusb_dec.c b/drivers/media/usb/ttusb-dec/ttusb_dec.c index 1d0afa340f47c..3198f9624b7c0 100644 --- a/drivers/media/usb/ttusb-dec/ttusb_dec.c +++ b/drivers/media/usb/ttusb-dec/ttusb_dec.c @@ -319,7 +319,7 @@ static int ttusb_dec_send_command(struct ttusb_dec *dec, const u8 command, dprintk("%s\n", __func__); - b = kmalloc(COMMAND_PACKET_SIZE + 4, GFP_KERNEL); + b = kzalloc(COMMAND_PACKET_SIZE + 4, GFP_KERNEL); if (!b) return -ENOMEM; -- 2.20.1