From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0DD87C04EBD for ; Tue, 16 Oct 2018 04:22:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C169320866 for ; Tue, 16 Oct 2018 04:22:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="KiT/X0Kc" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C169320866 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730140AbeJPMKg (ORCPT ); Tue, 16 Oct 2018 08:10:36 -0400 Received: from mail.kernel.org ([198.145.29.99]:52708 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729752AbeJPMD7 (ORCPT ); Tue, 16 Oct 2018 08:03:59 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2062021480; Tue, 16 Oct 2018 04:15:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1539663336; bh=f/V6a2/IKhsj8zNt+T+dTrCa3OVxHX7wwVOSw0fBasA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KiT/X0KcJXL9QyxSq+B866KmOVGIGUPZeh8RPPF9sjA00jvUwuy1GhDe6vL610vGu CnPEV9T1InEFMNyDELnOAjkX1I4KnFUUaTLm25lz4D77CsCH+rQsq7m4b5+h/mI2iT gBRtZdeo8JU9Y53pQ0/XpN0AtMoSyelZMea+X9gE= From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Alexandre Belloni , Li Yang , Olof Johansson , Sasha Levin Subject: [PATCH AUTOSEL 4.9 13/38] soc: fsl: qbman: qman: avoid allocating from non existing gen_pool Date: Tue, 16 Oct 2018 00:14:57 -0400 Message-Id: <20181016041522.135789-13-sashal@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181016041522.135789-1-sashal@kernel.org> References: <20181016041522.135789-1-sashal@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Alexandre Belloni [ Upstream commit 64e9e22e68512da8df3c9a7430f07621e48db3c2 ] If the qman driver didn't probe, calling qman_alloc_fqid_range, qman_alloc_pool_range or qman_alloc_cgrid_range (as done in dpaa_eth) will pass a NULL pointer to gen_pool_alloc, leading to a NULL pointer dereference. Signed-off-by: Alexandre Belloni Reviewed-by: Roy Pledge Signed-off-by: Li Yang (cherry picked from commit f72487a2788aa70c3aee1d0ebd5470de9bac953a) Signed-off-by: Olof Johansson Signed-off-by: Sasha Levin --- drivers/soc/fsl/qbman/qman.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/soc/fsl/qbman/qman.c b/drivers/soc/fsl/qbman/qman.c index 2caacd9d2526..2cc82ed6433a 100644 --- a/drivers/soc/fsl/qbman/qman.c +++ b/drivers/soc/fsl/qbman/qman.c @@ -2713,6 +2713,9 @@ static int qman_alloc_range(struct gen_pool *p, u32 *result, u32 cnt) { unsigned long addr; + if (!p) + return -ENODEV; + addr = gen_pool_alloc(p, cnt); if (!addr) return -ENOMEM; -- 2.17.1