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=-20.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 DD88AC07E9B for ; Sun, 4 Jul 2021 23:17:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CC92E61363 for ; Sun, 4 Jul 2021 23:17:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229963AbhGDXU1 (ORCPT ); Sun, 4 Jul 2021 19:20:27 -0400 Received: from mail.kernel.org ([198.145.29.99]:56956 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234329AbhGDXPE (ORCPT ); Sun, 4 Jul 2021 19:15:04 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 1FA6A61959; Sun, 4 Jul 2021 23:12:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625440331; bh=Jwmcti+3We7EFNmLTvoKXWIf7iEHNu7GmJoJp32kUpg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tsJDvmPQxc72tE8smHKuhfIsb94KUEn2pYSJJBOwj1jlCEjKEsqY/tEp0fE6r3/+c N906FuAlHAzUFptGP/xTzoaDU6J5MJXauw14d0Q4YfcS1sxSwQkv1fTA/ygY6ITMIf ofubGCam5I/gY2xUv+oEn9R0CByI1bA2wrtU0OUjHr8Z1wYu70D3zm5TjPaDQ6/kL2 EOOVNnOPXKIbZW51kRtXYA7jqjqdM2FZJBLXM6oKrvYFkQWJw+x/lFQXiOaQ44V08M jFVs3N9QTmEzcO9s6FJLM+0YuEq+HBr6h/yKDH2/JQeLN25kgDsFZ2ui9zwpz/d91j EkD1W6KhsRuMg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Evgeny Novikov , Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin , linux-media@vger.kernel.org Subject: [PATCH AUTOSEL 4.9 12/20] media: st-hva: Fix potential NULL pointer dereferences Date: Sun, 4 Jul 2021 19:11:47 -0400 Message-Id: <20210704231155.1491795-12-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210704231155.1491795-1-sashal@kernel.org> References: <20210704231155.1491795-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Evgeny Novikov [ Upstream commit b7fdd208687ba59ebfb09b2199596471c63b69e3 ] When ctx_id >= HVA_MAX_INSTANCES in hva_hw_its_irq_thread() it tries to access fields of ctx that is NULL at that point. The patch gets rid of these accesses. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Evgeny Novikov Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/platform/sti/hva/hva-hw.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/media/platform/sti/hva/hva-hw.c b/drivers/media/platform/sti/hva/hva-hw.c index c4d97fb80aae..1653892da9a5 100644 --- a/drivers/media/platform/sti/hva/hva-hw.c +++ b/drivers/media/platform/sti/hva/hva-hw.c @@ -127,8 +127,7 @@ static irqreturn_t hva_hw_its_irq_thread(int irq, void *arg) ctx_id = (hva->sts_reg & 0xFF00) >> 8; if (ctx_id >= HVA_MAX_INSTANCES) { dev_err(dev, "%s %s: bad context identifier: %d\n", - ctx->name, __func__, ctx_id); - ctx->hw_err = true; + HVA_PREFIX, __func__, ctx_id); goto out; } -- 2.30.2