Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751040AbaDOJPY (ORCPT ); Tue, 15 Apr 2014 05:15:24 -0400 Received: from mail-yk0-f178.google.com ([209.85.160.178]:60556 "EHLO mail-yk0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751154AbaDOJPU (ORCPT ); Tue, 15 Apr 2014 05:15:20 -0400 MIME-Version: 1.0 In-Reply-To: <1876072135.7241792.1397545235729.JavaMail.zimbra@redhat.com> References: <3009531.aHrQhHYAOc@daeseok-laptop.cloud.net> <1876072135.7241792.1397545235729.JavaMail.zimbra@redhat.com> Date: Tue, 15 Apr 2014 18:15:17 +0900 Message-ID: Subject: Re: [PATCH] drm/nouveau/clk: fix possible NULL pointer dereference From: DaeSeok Youn To: Ben Skeggs Cc: airlied@linux.ie, dri-devel@lists.freedesktop.org, linux-kernel Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2014-04-15 16:00 GMT+09:00 Ben Skeggs : > ----- Original Message ----- >> From: "Daeseok Youn" >> To: airlied@linux.ie >> Cc: bskeggs@redhat.com, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org >> Sent: Tuesday, 15 April, 2014 11:56:49 AM >> Subject: [PATCH] drm/nouveau/clk: fix possible NULL pointer dereference >> >> >> It need to be checking NULL before dereferencing. > There's no dereference here. It's an address calculation only. Oh.. You're right. But the address calculation doesn't need when "pstate" is NULL. Can I re-send this patch after modifying subject and comment of this patch properly? Or drop this patch. Thanks for review. Regards, Daeseok Youn. > >> >> Signed-off-by: Daeseok Youn >> --- >> drivers/gpu/drm/nouveau/core/subdev/clock/base.c | 2 +- >> 1 files changed, 1 insertions(+), 1 deletions(-) >> >> diff --git a/drivers/gpu/drm/nouveau/core/subdev/clock/base.c >> b/drivers/gpu/drm/nouveau/core/subdev/clock/base.c >> index dd62bae..a586d030 100644 >> --- a/drivers/gpu/drm/nouveau/core/subdev/clock/base.c >> +++ b/drivers/gpu/drm/nouveau/core/subdev/clock/base.c >> @@ -290,9 +290,9 @@ nouveau_pstate_new(struct nouveau_clock *clk, int idx) >> return 0; >> >> pstate = kzalloc(sizeof(*pstate), GFP_KERNEL); >> - cstate = &pstate->base; >> if (!pstate) >> return -ENOMEM; >> + cstate = &pstate->base; >> >> INIT_LIST_HEAD(&pstate->list); >> >> -- >> 1.7.4.4 >> >> >> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/