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 881932528ED; Tue, 29 Apr 2025 18:08:09 +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=1745950089; cv=none; b=KGKCgX8EvEfkHEmfBq3YVq68V7AE/9tDcpONOiIajOa3p2h+cvYRywBfRbyA8AxGXcEWl7+vVQVwUe5vdMw3K0wfilBi6mu+Zl+4he9MIwQ+NFlrHn4HU5lWNOCVxaS0A79yn9dGSMmAa1Ms4PmIz//psZBkwMhI2jP8OWWDsHo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745950089; c=relaxed/simple; bh=cittUK7G9jMsPDX9/wtIYccY8cycqbRl0/ak7TajJm4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=rTA9AgJXdNX/qx+lYAw7x+WNhzo18/pbGPvvbqpRtNESy5yxYUbbmnmKLLYUHrPHdWpa9FvWyWtgNOlX7WXQOtx1IRjiduqt2c75VEUjas2wGTca/LVLkS8DA5rgvHSXqbtpwwdPRlCLEFD04+VSDIVY58MgycBcbRHvu/U2ikQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=f7V9/zb4; 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="f7V9/zb4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E1025C4CEE3; Tue, 29 Apr 2025 18:08:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1745950089; bh=cittUK7G9jMsPDX9/wtIYccY8cycqbRl0/ak7TajJm4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=f7V9/zb4H3PPO1X+wYlzxY8unCK+/EBlzPwboDaOE+diXiYEkLl/awot0uYmIrRx5 vOmu/FFcXjuGH1Mu8i51N2I9r2lHEKJ5u+ASCrvcNzZL3nHVDdYGjNI+qb5hEpbKTS ZtrFuQlkTRvZhQruKRCLJs73U3E76O0X1PWAXwC0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Xiaogang Chen , =?UTF-8?q?Christian=20K=C3=B6nig?= , Sasha Levin Subject: [PATCH 6.1 125/167] udmabuf: fix a buf size overflow issue during udmabuf creation Date: Tue, 29 Apr 2025 18:43:53 +0200 Message-ID: <20250429161056.799057359@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250429161051.743239894@linuxfoundation.org> References: <20250429161051.743239894@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-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Xiaogang Chen [ Upstream commit 021ba7f1babd029e714d13a6bf2571b08af96d0f ] by casting size_limit_mb to u64 when calculate pglimit. Signed-off-by: Xiaogang Chen Link: https://patchwork.freedesktop.org/patch/msgid/20250321164126.329638-1-xiaogang.chen@amd.com Signed-off-by: Christian König Signed-off-by: Sasha Levin --- drivers/dma-buf/udmabuf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c index ef99174d81ced..546bba502fbc1 100644 --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -186,7 +186,7 @@ static long udmabuf_create(struct miscdevice *device, if (!ubuf) return -ENOMEM; - pglimit = (size_limit_mb * 1024 * 1024) >> PAGE_SHIFT; + pglimit = ((u64)size_limit_mb * 1024 * 1024) >> PAGE_SHIFT; for (i = 0; i < head->count; i++) { if (!IS_ALIGNED(list[i].offset, PAGE_SIZE)) goto err; -- 2.39.5