From patchwork Tue Aug 10 17:30:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 494926 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=-19.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, 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 68FA9C4320E for ; Tue, 10 Aug 2021 18:03:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4D77560EB7 for ; Tue, 10 Aug 2021 18:03:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237976AbhHJSDd (ORCPT ); Tue, 10 Aug 2021 14:03:33 -0400 Received: from mail.kernel.org ([198.145.29.99]:37210 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237084AbhHJSBa (ORCPT ); Tue, 10 Aug 2021 14:01:30 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id A60B1613B3; Tue, 10 Aug 2021 17:47:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1628617628; bh=w/2rgKHASbWUjHG49uEgq7xo3wn+EV0axey8DCLWdmM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qwhcBgyyILFn5IoQSH1Yorj3cTmhFQELEU+Sax3Rb4CKEs5uZebQGD9GpKHMqbz4K FVxbX2IkW483D0INt19tNagsoUD0yQY7/GOBD55sAGT/R2JZd168StCC6ZBkA/0/Tj ZO+kQ4jWD0L8paFukICS3z1DH8n+UWQny1lryMc8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Murphy , Tero Kristo , Kevin Hilman , Tony Lindgren Subject: [PATCH 5.13 143/175] ARM: omap2+: hwmod: fix potential NULL pointer access Date: Tue, 10 Aug 2021 19:30:51 +0200 Message-Id: <20210810173005.661087923@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210810173000.928681411@linuxfoundation.org> References: <20210810173000.928681411@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Tero Kristo commit b070f9ca78680486927b799cf6126b128a7c2c1b upstream. omap_hwmod_get_pwrdm() may access a NULL clk_hw pointer in some failure cases. Add a check for the case and bail out gracely if this happens. Reported-by: Dan Murphy Signed-off-by: Tero Kristo Cc: stable@vger.kernel.org # v5.10+ Signed-off-by: Kevin Hilman Signed-off-by: Tony Lindgren Signed-off-by: Greg Kroah-Hartman --- arch/arm/mach-omap2/omap_hwmod.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -3776,6 +3776,7 @@ struct powerdomain *omap_hwmod_get_pwrdm struct omap_hwmod_ocp_if *oi; struct clockdomain *clkdm; struct clk_hw_omap *clk; + struct clk_hw *hw; if (!oh) return NULL; @@ -3792,7 +3793,14 @@ struct powerdomain *omap_hwmod_get_pwrdm c = oi->_clk; } - clk = to_clk_hw_omap(__clk_get_hw(c)); + hw = __clk_get_hw(c); + if (!hw) + return NULL; + + clk = to_clk_hw_omap(hw); + if (!clk) + return NULL; + clkdm = clk->clkdm; if (!clkdm) return NULL;