From mboxrd@z Thu Jan 1 00:00:00 1970 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 433681E990D; Wed, 15 Jan 2025 11:00:13 +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=1736938814; cv=none; b=GJcmUwwKjCcvTWrng9iPWrQc/i9PcyoXdtMREUJ4d2BSDRxXbjBYSWv0ociy8WfuHH1Xxf5GGx+0uSLa5VdPAv55OVWxKq39iG+7JDZv70qXcuxpRAk8CJ+0Van0+SnqwyKcO2Kcuz3tmJBRYtEmBxhKzw3CyUYJX7UVv1U3nwg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736938814; c=relaxed/simple; bh=u1Df2IefwEk4F+gNWMY73Xa9dcVC0LGZB5AXJP1/B0k=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=j86PjGSIWQVbZZJx+J33YDWI+GVFPFbfkm7SJdT/7f5GwoEU55hDlB/UTS7IDse9S8oSLbfyZRUFK0SWwpicuTdT8s1YukQhgAvWKxDLPwzw1YxNBHFhpHgVkpOjyn8B/M6tEmw/2ORLh3Ye+rbIW0lNT8UMKWd1g82Nkfa4M2c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=dKZtXLRs; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="dKZtXLRs" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4912FC4CEDF; Wed, 15 Jan 2025 11:00:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1736938813; bh=u1Df2IefwEk4F+gNWMY73Xa9dcVC0LGZB5AXJP1/B0k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dKZtXLRsICkUI4Ygc9AWgZItF7FI7Z64g68bcacdGpiB/lNBSpcMH6c2smlA4xg5Q IU3bNUaisp7Pb4RPT2ZX+0mcLWyBNhj89e8fKE3JRJoVUAwjwsLO8QLpthkiC7gZkk +e8Lf/I/DHnn8eQmldO3GOdQJ5jJiF1goDc0ixe4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Javier Carrasco , Jonathan Cameron Subject: [PATCH 6.6 104/129] iio: light: vcnl4035: fix information leak in triggered buffer Date: Wed, 15 Jan 2025 11:37:59 +0100 Message-ID: <20250115103558.501688335@linuxfoundation.org> X-Mailer: git-send-email 2.48.0 In-Reply-To: <20250115103554.357917208@linuxfoundation.org> References: <20250115103554.357917208@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Javier Carrasco commit 47b43e53c0a0edf5578d5d12f5fc71c019649279 upstream. The 'buffer' local array is used to push data to userspace from a triggered buffer, but it does not set an initial value for the single data element, which is an u16 aligned to 8 bytes. That leaves at least 4 bytes uninitialized even after writing an integer value with regmap_read(). Initialize the array to zero before using it to avoid pushing uninitialized information to userspace. Cc: stable@vger.kernel.org Fixes: ec90b52c07c0 ("iio: light: vcnl4035: Fix buffer alignment in iio_push_to_buffers_with_timestamp()") Signed-off-by: Javier Carrasco Link: https://patch.msgid.link/20241125-iio_memset_scan_holes-v1-6-0cb6e98d895c@gmail.com Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/light/vcnl4035.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/iio/light/vcnl4035.c +++ b/drivers/iio/light/vcnl4035.c @@ -105,7 +105,7 @@ static irqreturn_t vcnl4035_trigger_cons struct iio_dev *indio_dev = pf->indio_dev; struct vcnl4035_data *data = iio_priv(indio_dev); /* Ensure naturally aligned timestamp */ - u8 buffer[ALIGN(sizeof(u16), sizeof(s64)) + sizeof(s64)] __aligned(8); + u8 buffer[ALIGN(sizeof(u16), sizeof(s64)) + sizeof(s64)] __aligned(8) = { }; int ret; ret = regmap_read(data->regmap, VCNL4035_ALS_DATA, (int *)buffer);