From patchwork Fri Oct 18 05:53:07 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Mauro Carvalho Chehab X-Patchwork-Id: 13841150 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7ACD3187862; Fri, 18 Oct 2024 05:53:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729230807; cv=none; b=nM8a7niHciXG18wT6O3J4cMV2/6Mqc6U0fFY1Rh3EivAtKJ/2EspW+4qQWHSpHNxnTS2XT8kr6n+mud9TnveVDlFaWiu675mRsvI9poH4kjf66ogqchkjtJQzouSXguDeLxEOJXSOvSZHq2EQHMHA9jL1zjKp1GI2QujwdXYv2w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729230807; c=relaxed/simple; bh=lGWpAXxWV3zz4XGNsiMpE6t375yXbG2Tiq87XA+eXFc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=F4L8e/lbEvAz0c+3Jg8HhF1/nT4B5JpTS2s4Yyym36juXQWVJ4cqS63romTlf0NfsdAbO7g2sSQNdZnb81HDE6nkanEUk5bJIph4tHsFBEt2EpZ7f3VJ9L4XYP34pbiAMtSZoco6dvHdrV2ZmDDqt/j2aQIgHybr2EQ9hoMRSUw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gX8Vei/t; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="gX8Vei/t" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BDD63C4CED2; Fri, 18 Oct 2024 05:53:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1729230806; bh=lGWpAXxWV3zz4XGNsiMpE6t375yXbG2Tiq87XA+eXFc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gX8Vei/tEEktbLeGqPL31wg87cH7/bnX6mQdsiTAZxq3oFxpXT51xPFppxECcf8qV 2K+Fd6J1w7OBkzSlWVXsjuOKte+IEUvp9LMJr9JZ+W/AJ04LePmjHgchRRfW9gZ9ik qr6c+OJ+/CVxxXo4xsdR9f0XeNmT8yff//sR3OZIczW9MtRHsMs5JRVpNNEOAtYKiU gDFzS9oRLfeHab5Y4tLURTNMWa8PHqn4xeGvnrBEDggxX3pYWvlvK6cJkoSqIvEIXb Yl5Fqg/bXR5pEUi9bYu9p4xqzmRr4RvByak9tS2bA8XwrK15fPORdZpR27r0un7ASi HY9IdjGSHVdrw== Received: from mchehab by mail.kernel.org with local (Exim 4.98) (envelope-from ) id 1t1fvQ-00000005MeD-1goc; Fri, 18 Oct 2024 07:53:24 +0200 From: Mauro Carvalho Chehab To: Cc: Mauro Carvalho Chehab , Hans Verkuil , Martin Tuma , Mauro Carvalho Chehab , linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH v2 05/13] media: mgb4: protect driver against spectre Date: Fri, 18 Oct 2024 07:53:07 +0200 Message-ID: X-Mailer: git-send-email 2.47.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Sender: Mauro Carvalho Chehab Frequency range is set from sysfs via frequency_range_store(), being vulnerable to spectre, as reported by smatch: drivers/media/pci/mgb4/mgb4_cmt.c:231 mgb4_cmt_set_vin_freq_range() warn: potential spectre issue 'cmt_vals_in' [r] drivers/media/pci/mgb4/mgb4_cmt.c:238 mgb4_cmt_set_vin_freq_range() warn: possible spectre second half. 'reg_set' Fix it. Fixes: 0ab13674a9bd ("media: pci: mgb4: Added Digiteq Automotive MGB4 driver") Cc: stable@vger.kernel.org Signed-off-by: Mauro Carvalho Chehab Reviewed-by: Martin Tůma --- drivers/media/pci/mgb4/mgb4_cmt.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/media/pci/mgb4/mgb4_cmt.c b/drivers/media/pci/mgb4/mgb4_cmt.c index 70dc78ef193c..a25b68403bc6 100644 --- a/drivers/media/pci/mgb4/mgb4_cmt.c +++ b/drivers/media/pci/mgb4/mgb4_cmt.c @@ -227,6 +227,8 @@ void mgb4_cmt_set_vin_freq_range(struct mgb4_vin_dev *vindev, u32 config; size_t i; + freq_range = array_index_nospec(freq_range, ARRAY_SIZE(cmt_vals_in)); + addr = cmt_addrs_in[vindev->config->id]; reg_set = cmt_vals_in[freq_range];