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 8B41B247280; Mon, 14 Apr 2025 13:26:18 +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=1744637180; cv=none; b=hOdhrtCC+ndymoESiVBTPLptapXTbRqlDDbjM7jgy6SmlYc8iMyzKOlLLhPPt3a5fmmAbMo0Qeedm60VLArC882u/XwQuTybtjlcdDwCpLUrmY9hnFvf/BmIwB5CjJUYYpiOQ9TOCl+ARBZeumJaGXe7lIKR88YHx4nGYTxpnps= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744637180; c=relaxed/simple; bh=TsvvjU34ou6DeKBnAEaZf6xjk/wVJu2sGieu/mEr1vs=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=PkxP4lJJ4YVRijxM/BvzUYz3QvhHPvWTH9WMdmxoA1i2QpPHF6E0I/6XOdWzfM9RYLOS4MoqpSdxkdEaPZ//vwGbAoRf8xTws3YSHZBf8U/bebgwLyCRBcBImVjS0y6RojWzPhKqcRg745KvA7L2wQquBT4HVvoFV7zcAcYUed0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=GGCmOwGi; 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="GGCmOwGi" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B8ECDC4CEEB; Mon, 14 Apr 2025 13:26:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744637178; bh=TsvvjU34ou6DeKBnAEaZf6xjk/wVJu2sGieu/mEr1vs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GGCmOwGiudfQ5/3NNQ5aNd6+B8nkT/bqwedQWP+NuBSSQRkjSYS7COmYhfiFS7nc1 eztfXm6mlqIQ1u72XVGEhyCSGcDMEWWL9z7FYUyzOjEYSC6z2quaj5TvyY27w2TIpn AYek6uQk8KIdEBfC+tSLCIi+tT5mK/AzhP80hVzBbvLbcYDaTBDeNZ6ZX35dN8AXS0 hKILfWXKkqjm8DZ4MYfvPhBE+BhGaNPyrQq0fSPyq6wqUviUlFRoi/hUJ1VMr06xvD IbgBkCsf5fNU9KTdo9rGGx/QiZT3vgA5ULtis60312MFBhoT3dcCRj96oK2lwXCk0/ 7b78mFGHPuKTg== 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 6.14 03/34] udmabuf: fix a buf size overflow issue during udmabuf creation Date: Mon, 14 Apr 2025 09:25:39 -0400 Message-Id: <20250414132610.677644-3-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250414132610.677644-1-sashal@kernel.org> References: <20250414132610.677644-1-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 6.14.2 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 cc7398cc17d67..e74e36a8ecda2 100644 --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -393,7 +393,7 @@ 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++) { pgoff_t subpgcnt; -- 2.39.5