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 5C80C2BF3E2; Mon, 14 Apr 2025 13:30:05 +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=1744637405; cv=none; b=IOarejiq9tLL/mNcqDtfKC2Tr0TndKQ8vWweQsAaW/Qt1lVue9uwmjhYm/rrdPHjPqts9R85I8c1HeMpTmMNeTsRrjPP64gB24x+4xs1EVScfyV995N2z6zUf42Uta23tyFhfjz7N4x9RlWBWiO277GH0Ctkx9Se/Qg02cVkaKY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744637405; c=relaxed/simple; bh=bSdjzf03N5dkH1r6wALmuE4ALtyVK39xcb0mwy/hEwI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=VjMfK48P5uLcLmLSUODSEagLZxrEpeh631n+T5pI81V9Ds9N7JX3aPWHkaKhOldqRcjhfWx4KK2SgOlZ25Nv5XPqlwo4+ZG6ebMQvU8yq4fpivtgoo+6cLeuH5YEK6OMlWGNmpOdqeQnUShBiLhJ6eQ7+X7QyUeE+EuSKrNIrL8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=YdyEmnS9; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="YdyEmnS9" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9674AC4CEE2; Mon, 14 Apr 2025 13:30:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744637405; bh=bSdjzf03N5dkH1r6wALmuE4ALtyVK39xcb0mwy/hEwI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YdyEmnS95zF/sd+/SjXX8/WuYXIfZiGn7p5vOt0GQHcqVacfiyw+n4YitYmUi1Cd4 B1l/3M5xykCIrLKkpl/OKdrN+EkEhZOdJMrBJLz6wXDf6ipTuWPHCTcsiz2Uja5Xog h0DyPs6xTcXbqHIiKixa+PGEEWfK0LjjRknDjZLXqM0ou5rjFQ7Sw6/V8ZbCWj67Mt 46tq3Xy6dZb7MhtLpmNGtXeCC1GozlpnZV/JE9tuoRw9AJSryPIT/FboEP8dC/GLX5 9uChci2tSdK/nUu7Yue3pJEm+5uSaxRxIQpMCyxGFjv67EInYj4hZf4OEuQ7R00PjP nZmRgbLIfQEhw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Xiaogang Chen , Xiaogang Chen , =?UTF-8?q?Christian=20K=C3=B6nig?= , Sasha Levin , kraxel@redhat.com, vivek.kasireddy@intel.com, sumit.semwal@linaro.org, dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org Subject: [PATCH AUTOSEL 6.6 03/24] udmabuf: fix a buf size overflow issue during udmabuf creation Date: Mon, 14 Apr 2025 09:29:36 -0400 Message-Id: <20250414132957.680250-3-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250414132957.680250-1-sashal@kernel.org> References: <20250414132957.680250-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.6.87 Content-Transfer-Encoding: 8bit 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 d1fcdd1f9aaed..373282beeb606 100644 --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -214,7 +214,7 @@ 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