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 D35311B3922; Mon, 23 Dec 2024 16:09:12 +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=1734970152; cv=none; b=jzuYxtd6D288DApkX9OMyzkLWKNwr76AGdcZpYLQ49+eXwpl/TCzKyqXzBA1jHdYuqPlpEKHlFY6kXqoiaU7rppzJNYzkG5abZP6buiookRl9KQTMXbj7fHvGj4XbyosJhKGWTVOgbCY37Oq1uwh7NZVH15R1bLs5ME1iZ9Xb38= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734970152; c=relaxed/simple; bh=FLi3OEag2nMlhwJiTtjlx55glieJ4Z7+MFshq2nEC44=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=P+PiAz33WUE2uSvhSexAFHP0YqXKB7Mh8NpsZGZVrWL8/YnZeYLQj38Am8ESwy0Qo460Xr2Yq3zlJNvSx8XU8I081An9Uam5uhc6EzTgwxw48snwhnhlLOge1ABlIZ0pSDOPq2WmNz51jOyTYAeJ1wvHDiqf1LiVxiEQNNcZrMQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=EOsd3tKH; 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="EOsd3tKH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4B837C4CED3; Mon, 23 Dec 2024 16:09:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1734970152; bh=FLi3OEag2nMlhwJiTtjlx55glieJ4Z7+MFshq2nEC44=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EOsd3tKHakTlDPl1PPl+drPRe5e23ULqEhanJ2Q2q4AjZE9kfssaQJ7D/cOZ2tF4G ckGzRVK5xImDlflTLedWEfX8rfMDWfDyxXSwKqDz+v7LTfyWdqu++hDjTJYlcd4LTA PijCPCAcoGIXDg2OVMByhYKV81dq0cZXL+tyT3MU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Vivek Kasireddy , Jann Horn , "Joel Fernandes (Google)" Subject: [PATCH 6.12 146/160] udmabuf: also check for F_SEAL_FUTURE_WRITE Date: Mon, 23 Dec 2024 16:59:17 +0100 Message-ID: <20241223155414.454177066@linuxfoundation.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241223155408.598780301@linuxfoundation.org> References: <20241223155408.598780301@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jann Horn commit 0a16e24e34f28210f68195259456c73462518597 upstream. When F_SEAL_FUTURE_WRITE was introduced, it was overlooked that udmabuf must reject memfds with this flag, just like ones with F_SEAL_WRITE. Fix it by adding F_SEAL_FUTURE_WRITE to SEALS_DENIED. Fixes: ab3948f58ff8 ("mm/memfd: add an F_SEAL_FUTURE_WRITE seal to memfd") Cc: stable@vger.kernel.org Acked-by: Vivek Kasireddy Signed-off-by: Jann Horn Reviewed-by: Joel Fernandes (Google) Signed-off-by: Vivek Kasireddy Link: https://patchwork.freedesktop.org/patch/msgid/20241204-udmabuf-fixes-v2-2-23887289de1c@google.com Signed-off-by: Greg Kroah-Hartman --- drivers/dma-buf/udmabuf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -256,7 +256,7 @@ static const struct dma_buf_ops udmabuf_ }; #define SEALS_WANTED (F_SEAL_SHRINK) -#define SEALS_DENIED (F_SEAL_WRITE) +#define SEALS_DENIED (F_SEAL_WRITE|F_SEAL_FUTURE_WRITE) static int check_memfd_seals(struct file *memfd) {