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 57CB13C17; Fri, 31 Oct 2025 14:05:03 +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=1761919503; cv=none; b=ecW4LX2eLwrzeXAhpWs2YksHzwwK2veTbgiBrCEnew8gHsvVyE1ZOToT2Qt5aQ6Nyz/PZPncJXhRI04CwqsNd44AyLjwpmhcDQECAjMg3bJIq4fTAOKHdKbMWWsBVmpGpsfdZoSFhE2nJIZ+hp+fudFyaQglIefpBpkuDRVPZMg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761919503; c=relaxed/simple; bh=ppi3t5hKrBhOCwcpZhTGp3Ra+Dix2hFqaoi2yd9KN84=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=C0DwMtA43P0FJV08TSPBNp/oTRqfLHMswPo3HeSXUb53/a43zYBbiNrEETyIIuQPDzvUs66sOk+NwOuNIg6Hth6UXQFPFv+4qX4lK0l9V8hNhLwa6O1OdcAlx/D5u5Tw6EjKAv6sDZ7uEJQf0XT6MiLn153wQJ7ae8EIiTe0iuA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=R9GlHwJJ; 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="R9GlHwJJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 819DFC4CEE7; Fri, 31 Oct 2025 14:05:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1761919502; bh=ppi3t5hKrBhOCwcpZhTGp3Ra+Dix2hFqaoi2yd9KN84=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=R9GlHwJJvmKGZZndiT2eEFhyHHIQcjsZD9zoGWMe1TLsAonYvLQW3zr+ncOUHfhPe IbY3Wr+Orq42R2sUVUCtVLMXsMbaGJAw7UimaZ4CW2J+uiAqxqwwMt3qbPjhdKZz5U Rtma9ic30FQ/10tXOOgFHmXlfZYrHgC/+wzCOV0w= 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?= , Amelia Crate Subject: [PATCH 6.12 39/40] udmabuf: fix a buf size overflow issue during udmabuf creation Date: Fri, 31 Oct 2025 15:01:32 +0100 Message-ID: <20251031140044.967565261@linuxfoundation.org> X-Mailer: git-send-email 2.51.2 In-Reply-To: <20251031140043.939381518@linuxfoundation.org> References: <20251031140043.939381518@linuxfoundation.org> User-Agent: quilt/0.69 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 6.12-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: Amelia Crate 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 @@ -350,7 +350,7 @@ static long udmabuf_create(struct miscde return -ENOMEM; INIT_LIST_HEAD(&ubuf->unpin_list); - 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 (!PAGE_ALIGNED(list[i].offset)) goto err;