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 Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 76956C43334 for ; Tue, 28 Jun 2022 02:26:24 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id AA4051657; Tue, 28 Jun 2022 04:25:32 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz AA4051657 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1656383182; bh=ilvURhaxj9mgUg4uRt4O2KV1o5dU0YnE3UMEOl0buAE=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=Db2HCUG/WJtt7RuK7IHJ+3zEZhFWsPpXMSCCY64XiVpCnuhfa9nsdB+DDMhjSws7z sMRJqZboJsueD3wh4KWoRzuRZMs0ucmV17tu1RzAeytBnMglJ2F14mjcEMkVUReoPi pbn+nYRjpIRUEifWeyFg0Sl74sgnBohZ4SR7O0gM= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 52BEBF80167; Tue, 28 Jun 2022 04:25:32 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 8F3A2F8025B; Tue, 28 Jun 2022 04:25:30 +0200 (CEST) Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 2E4DFF80107 for ; Tue, 28 Jun 2022 04:25:27 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 2E4DFF80107 Authentication-Results: alsa1.perex.cz; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="WUag1CzM" Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id BC9C0B81C10; Tue, 28 Jun 2022 02:25:26 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4C2E6C385A2; Tue, 28 Jun 2022 02:25:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1656383125; bh=ilvURhaxj9mgUg4uRt4O2KV1o5dU0YnE3UMEOl0buAE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WUag1CzMuRChkEdsYqUOYEm8Y3dthHpc9BSTQZqy7Iem9KmkjKZiuJB6wqScecbPN K1BX83qPCqtPYLQLN9aDGmio6fzMiw6iI0UPl0T4PhaQveBDbfjswjaMxSQAEcZh0Z YJPhQVmP4DWXS/9RO/FcSl+/Cb8Zb9mbRnaIGmsQ72UAPLVkreCdTJlIHj5x4RYlsE lPc3vXwelykEnup6cxgDmfhrHS8omTuiIpLGELhqjrXX+U8FjivIwofiTlYmpHDlDI 943hVhPe58TV3d2VU7Cy0O1HHN9QkPqpbDSkWBrPjLH7/htFPdg5gyJ4ubfEF28LHp QDHltNa0gQeqQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 03/22] ALSA: usb-audio: US16x08: Move overflow check before array access Date: Mon, 27 Jun 2022 22:24:58 -0400 Message-Id: <20220628022518.596687-3-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220628022518.596687-1-sashal@kernel.org> References: <20220628022518.596687-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Cc: Sasha Levin , Daniil Dementev , alsa-devel@alsa-project.org, Takashi Iwai , tiwai@suse.com, Alexey Khoroshilov X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" From: Daniil Dementev [ Upstream commit 3ddbe35d9a2ebd4924d458e0246b4ba6c13bb456 ] Buffer overflow could occur in the loop "while", due to accessing an array element before checking the index. Found by Linux Verification Center (linuxtesting.org) with SVACE. Signed-off-by: Daniil Dementev Reviewed-by: Alexey Khoroshilov Link: https://lore.kernel.org/r/20220610165732.2904-1-d.dementev@ispras.ru Signed-off-by: Takashi Iwai Signed-off-by: Sasha Levin --- sound/usb/mixer_us16x08.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/sound/usb/mixer_us16x08.c b/sound/usb/mixer_us16x08.c index 7db3032e723a..5e3b7fd43fc2 100644 --- a/sound/usb/mixer_us16x08.c +++ b/sound/usb/mixer_us16x08.c @@ -647,10 +647,10 @@ static int snd_get_meter_comp_index(struct snd_us16x08_meter_store *store) } } else { /* skip channels with no compressor active */ - while (!store->comp_store->val[ + while (store->comp_index <= SND_US16X08_MAX_CHANNELS + && !store->comp_store->val[ COMP_STORE_IDX(SND_US16X08_ID_COMP_SWITCH)] - [store->comp_index - 1] - && store->comp_index <= SND_US16X08_MAX_CHANNELS) { + [store->comp_index - 1]) { store->comp_index++; } ret = store->comp_index++; -- 2.35.1