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 CB84221ABDB; Tue, 29 Apr 2025 17:24:31 +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=1745947471; cv=none; b=TQtut0y9NX8299m2QSz8MdOjztVb4h4yHaz4oWZKGRnOqOMsmSvqBQGmhksLGIQI2hlblamhb0pBhjDqEsI/KVo5sCi/UcGEuAuA3VP2Z5ybRsgy/c6X5YPcxZNdnW2D7yrXTSqkBlrsVtzy/GDQXWZm3ko6fIhurLQ/RmUN9WA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745947471; c=relaxed/simple; bh=qoNMDEqMhTDa+9tdgaOdCKzWoMvyP6KIZWNfGsWWMTs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=X+R1dm4N3ovmrlqGW1O3F6+0osKBVz5qv57k2yjWdtSM/78xNXOmHpKpI4+zEexRMGK0yVGNt6wf+uiQHLO/gR6qW76K5d7HvUlKyby0HNIIQGC2CbyDQudOauqqZLX1TfeatLpFLzh5p5x4sKuE0gQvZSlwuG+eN/lRupMXYOA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=bYF2uQOX; 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="bYF2uQOX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 50FF7C4CEE3; Tue, 29 Apr 2025 17:24:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1745947471; bh=qoNMDEqMhTDa+9tdgaOdCKzWoMvyP6KIZWNfGsWWMTs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bYF2uQOX1MV4vFV67OcCFPSFgxuo9sO1IhEb+O9/HklBCIBfjgEVLDRQLug1YNLoX j9uwLuqz9LzC7EHP+h89pZwOEytnF3oBSpyGDg0kZbokN2qTIIIiA6eVQ+lP3/Ho42 sNiWFKljIgkiK48ASn+z0o0Kx1EZ0wrP7zVV9/gQ= 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 5.10 265/286] udmabuf: fix a buf size overflow issue during udmabuf creation Date: Tue, 29 Apr 2025 18:42:49 +0200 Message-ID: <20250429161118.818692731@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250429161107.848008295@linuxfoundation.org> References: <20250429161107.848008295@linuxfoundation.org> User-Agent: quilt/0.68 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-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 5.10-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 14b79458ac7f4..597a92438afc1 100644 --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -177,7 +177,7 @@ 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