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 56C3B1EF95B; Wed, 6 Nov 2024 13:10:33 +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=1730898633; cv=none; b=GR8QNYoa7kkQ+1Li9RBTALMXdEf0DluWSsCOjPiXSshGwvq2UoX1w2/078E4qiF6FoR8IkDoyg17cQQJSZsAVt/NnIwVoQ04pz0L6q4bwjIsU15hD7CXOZ+yaPy4FMfHVzG0W3tWp2Q0f9pMrkibmUXpJ7/H42iRD5kkKvOXkUM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730898633; c=relaxed/simple; bh=ANusYawQmmSchQhs60YHQt5TdJFDotCqqJLc0ea4BRs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=X6TwU2aBEglDaxGRQpL9H81CG5AFZ0CRp7Ez6fGYip9pi6+eelQrFCr8XJ8+RdXn3i5CZ28yrx1teRBOEtMqdf5Ne0MXPX7YqteJcpWLfr4BmTCFasxskRYDBHEMagI18t2bL3a7XBhzyrSK7EAR7GC7tFNilq6PtxFYMiodsU4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=XJHYxTY6; 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="XJHYxTY6" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CD9EBC4CED4; Wed, 6 Nov 2024 13:10:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1730898633; bh=ANusYawQmmSchQhs60YHQt5TdJFDotCqqJLc0ea4BRs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XJHYxTY6e7fvjSWujU4Enyo3q6M93Wxv0sWT2E43DrA4c6JloETOhwHND5iLccXuz W2ySIDwzBrMkJPXUZZBSIYgz/1+NySz6jtHAFszXYZv3eJig6sn1XWtoFRw5UXPevM iejnVY73Moi0V0cNgg+z7Pm7jq2D3wRiRUPcA3L8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Torsten Hilbrich , Mathias Krause , Dmitry Torokhov , Tzung-Bi Shih , Sasha Levin Subject: [PATCH 5.4 302/462] Input: synaptics-rmi4 - fix UAF of IRQ domain on driver removal Date: Wed, 6 Nov 2024 13:03:15 +0100 Message-ID: <20241106120338.988532358@linuxfoundation.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241106120331.497003148@linuxfoundation.org> References: <20241106120331.497003148@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 5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mathias Krause commit fbf8d71742557abaf558d8efb96742d442720cc2 upstream. Calling irq_domain_remove() will lead to freeing the IRQ domain prematurely. The domain is still referenced and will be attempted to get used via rmi_free_function_list() -> rmi_unregister_function() -> irq_dispose_mapping() -> irq_get_irq_data()'s ->domain pointer. With PaX's MEMORY_SANITIZE this will lead to an access fault when attempting to dereference embedded pointers, as in Torsten's report that was faulting on the 'domain->ops->unmap' test. Fix this by releasing the IRQ domain only after all related IRQs have been deactivated. Fixes: 24d28e4f1271 ("Input: synaptics-rmi4 - convert irq distribution to irq_domain") Reported-by: Torsten Hilbrich Signed-off-by: Mathias Krause Link: https://lore.kernel.org/r/20240222142654.856566-1-minipli@grsecurity.net Signed-off-by: Dmitry Torokhov Signed-off-by: Tzung-Bi Shih Signed-off-by: Sasha Levin --- drivers/input/rmi4/rmi_driver.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/input/rmi4/rmi_driver.c b/drivers/input/rmi4/rmi_driver.c index aa32371f04af6..ef9ea295f9e03 100644 --- a/drivers/input/rmi4/rmi_driver.c +++ b/drivers/input/rmi4/rmi_driver.c @@ -978,12 +978,12 @@ static int rmi_driver_remove(struct device *dev) rmi_disable_irq(rmi_dev, false); - irq_domain_remove(data->irqdomain); - data->irqdomain = NULL; - rmi_f34_remove_sysfs(rmi_dev); rmi_free_function_list(rmi_dev); + irq_domain_remove(data->irqdomain); + data->irqdomain = NULL; + return 0; } -- 2.43.0