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 EBAAC1BD519; Tue, 2 Jul 2024 17:23:35 +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=1719941016; cv=none; b=SQiYKTKmDPoTb5rujFk5kbIpACAE+dpAYecTVusNv3CeNH29X1nTwjPcIYP+fX+rKD5251YYCqB91+3zJp797CNrD5MB+fwr+xxkr5tiwnXGemMmfYhoZwya72zd/ILjocMsIwL/fCS9T1n6zXLK4/EZzotBBQ/hDb13DDWaMh4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719941016; c=relaxed/simple; bh=4rdTcDv5+fJUy3BXLGvT6m0H5RmfGAzvkCBFuNB7CwA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=RdcVMCQdicWXZIxusdOXZGUoEbWnrEj+rkXm2jF6X5CxdpeEUnmfzIrGTzRDjXn1mDWd4+7ZeLUHtXh0lvj3HB1sCAWdXeFMwefaD14+L+WMuW00z2g5Td5qaDzMdpCp/FnHNNDwcxTPrr7ailqMXWCy5PdKMiyP8MFRSu7DVDI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Bi1codYv; 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="Bi1codYv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1D887C116B1; Tue, 2 Jul 2024 17:23:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1719941015; bh=4rdTcDv5+fJUy3BXLGvT6m0H5RmfGAzvkCBFuNB7CwA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Bi1codYv22drX6Rz1RFlHqr8/vFBbmikCIPgxLebDLHERs1kj6/hHZAQFGywNRku9 ieZ3wj9W/sxwUA9CHtJlYzO+gKSI4UKBawzrZu0jMh8f2NrVVUDPPpT+4anSpT+EOE QldxDlFC1R87Dybekz3qAnrIwmfO6k45pbWE/jYQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Aleksandr Mishin , Bartosz Golaszewski , Sasha Levin Subject: [PATCH 6.6 072/163] gpio: davinci: Validate the obtained number of IRQs Date: Tue, 2 Jul 2024 19:03:06 +0200 Message-ID: <20240702170235.790978440@linuxfoundation.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240702170233.048122282@linuxfoundation.org> References: <20240702170233.048122282@linuxfoundation.org> User-Agent: quilt/0.67 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: Aleksandr Mishin [ Upstream commit 7aa9b96e9a73e4ec1771492d0527bd5fc5ef9164 ] Value of pdata->gpio_unbanked is taken from Device Tree. In case of broken DT due to any error this value can be any. Without this value validation there can be out of chips->irqs array boundaries access in davinci_gpio_probe(). Validate the obtained nirq value so that it won't exceed the maximum number of IRQs per bank. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: eb3744a2dd01 ("gpio: davinci: Do not assume continuous IRQ numbering") Signed-off-by: Aleksandr Mishin Link: https://lore.kernel.org/r/20240618144344.16943-1-amishin@t-argos.ru Signed-off-by: Bartosz Golaszewski Signed-off-by: Sasha Levin --- drivers/gpio/gpio-davinci.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c index 8db5717bdabe5..aa3ce8aa99dc8 100644 --- a/drivers/gpio/gpio-davinci.c +++ b/drivers/gpio/gpio-davinci.c @@ -225,6 +225,11 @@ static int davinci_gpio_probe(struct platform_device *pdev) else nirq = DIV_ROUND_UP(ngpio, 16); + if (nirq > MAX_INT_PER_BANK) { + dev_err(dev, "Too many IRQs!\n"); + return -EINVAL; + } + chips = devm_kzalloc(dev, sizeof(*chips), GFP_KERNEL); if (!chips) return -ENOMEM; -- 2.43.0