From patchwork Mon May 16 19:36:23 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 573877 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D2636C433F5 for ; Mon, 16 May 2022 19:39:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345542AbiEPTjg (ORCPT ); Mon, 16 May 2022 15:39:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45756 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345537AbiEPTj0 (ORCPT ); Mon, 16 May 2022 15:39:26 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2D2D53EF09; Mon, 16 May 2022 12:38:55 -0700 (PDT) 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 dfw.source.kernel.org (Postfix) with ESMTPS id A629761518; Mon, 16 May 2022 19:38:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9A673C385AA; Mon, 16 May 2022 19:38:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1652729934; bh=ISZcK/ZX9IJ8RTUAaEuQ43PU7CydBS6RpFZ6oCpcNbc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NqpYXqXdgOX5jvhl9An1rnPjttFOp2ZB5Ym7qchjbxfVzKEhsNfFJTy8vwxkABLRh D4NY7umqWX1qG6GUBqxgmTda+UVDKAqkxXvluVMkGujiEd7IvmIne9vcjNTOkINi7c oCrjW5iTDVuO+Ta/o17tQoGN24gCiLwIFEapAMV8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mark Brown , Sasha Levin Subject: [PATCH 4.9 10/19] ASoC: max98090: Reject invalid values in custom control put() Date: Mon, 16 May 2022 21:36:23 +0200 Message-Id: <20220516193613.806343797@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220516193613.497233635@linuxfoundation.org> References: <20220516193613.497233635@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Mark Brown [ Upstream commit 2fbe467bcbfc760a08f08475eea6bbd4c2874319 ] The max98090 driver has a custom put function for some controls which can only be updated in certain circumstances which makes no effort to validate that input is suitable for the control, allowing out of spec values to be written to the hardware and presented to userspace. Fix this by returning an error when invalid values are written. Signed-off-by: Mark Brown Link: https://lore.kernel.org/r/20220420193454.2647908-1-broonie@kernel.org Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- sound/soc/codecs/max98090.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/sound/soc/codecs/max98090.c b/sound/soc/codecs/max98090.c index e7aef841f87d..4aefb13900c2 100644 --- a/sound/soc/codecs/max98090.c +++ b/sound/soc/codecs/max98090.c @@ -419,6 +419,9 @@ static int max98090_put_enab_tlv(struct snd_kcontrol *kcontrol, val = (val >> mc->shift) & mask; + if (sel < 0 || sel > mc->max) + return -EINVAL; + *select = sel; /* Setting a volume is only valid if it is already On */