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 740A8250C02; Tue, 29 Apr 2025 16:53:30 +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=1745945610; cv=none; b=ZGqHSLOFfWVxchZQTK95oO/raWfC2JYSIG20eajot/blYcrFHG16UMx+FTvv/V2BnU5wrUI6nAHm+sDqEvXy+qjnA5615GnoUwSPSADjHWF3lPDejDuVanRqRIFRxBDU5giB6ovzgvBK9SctvSgPxBnSLZifUDTriGvenDr6sWg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745945610; c=relaxed/simple; bh=roFMgTDoQBm5QlgSPAhZ1ZCOvIZcYWCpJBemWPUD+z0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Y8QdDkPyRoPeWqYGmtp0ybys6iL/nyjq29157R8LxgoWW8V5sVCXjspxOl+KmZLvdRM5rYdpM0OBlQW2VEd5ieTqX4qbVBroYTwjVWVdwGF6+LInfCazEqi94yeh8PLf8LdxTSJnjL+H+onEM7PAJsg97ZXGhpa9qUfptEaFjy0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=huE0BE6M; 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="huE0BE6M" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D7989C4CEE3; Tue, 29 Apr 2025 16:53:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1745945610; bh=roFMgTDoQBm5QlgSPAhZ1ZCOvIZcYWCpJBemWPUD+z0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=huE0BE6Mhc7RsdWpLgvT8dmmcekYRewWy1WWRKVkNwxx8RBAxO0AMGZGi0GPRWLJz Ws1nz0ZjS38AXQti0p7jPux0NEU26v68Iddn0Nmad21UVMSg5frwp59iR6wgGgDvRu fAo8cdEDFjtIFL4YAVnGXdajnfOU7OQm+ffUSlGU= 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 5.4 170/179] udmabuf: fix a buf size overflow issue during udmabuf creation Date: Tue, 29 Apr 2025 18:41:51 +0200 Message-ID: <20250429161056.276685818@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250429161049.383278312@linuxfoundation.org> References: <20250429161049.383278312@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 5.4-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 ae42e98cf8350..dfb572282097b 100644 --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -138,7 +138,7 @@ static long udmabuf_create(const struct udmabuf_create_list *head, 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