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[2620:137:e000::3:8]) by mx.google.com with ESMTPS id d5-20020a056a00244500b0068fce0c7193si3129045pfj.282.2023.10.07.00.10.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 07 Oct 2023 00:10:31 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:8 as permitted sender) client-ip=2620:137:e000::3:8; Authentication-Results: mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=korg header.b=fMbgk3mv; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:8 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linuxfoundation.org Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by fry.vger.email (Postfix) with ESMTP id 16EAF80565B5; Sat, 7 Oct 2023 00:10:28 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.10 at fry.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343644AbjJGHKT (ORCPT + 99 others); Sat, 7 Oct 2023 03:10:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42472 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343572AbjJGHKS (ORCPT ); Sat, 7 Oct 2023 03:10:18 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 18D5CB9; Sat, 7 Oct 2023 00:10:18 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1E38FC433C8; Sat, 7 Oct 2023 07:10:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1696662617; bh=xeHnT2C9sh0AspYV0KkPiTMG27K+EQ5856aRmwIk09A=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=fMbgk3mvwmCKY+R93LchM3ZW+Lp4DVA55slkhxzmhqnr9EaXW9SolajgfqOOvMY3b LduunjkUaxB69wOJ6ZHKli0w4PwWDsmlN1FlDrucGV1YTL8DsmnbCYXD4Bey8M8ZEA uqIyTwP9PJOOYL9sUKASzMYu20O38sAVbx27jUcM= Date: Sat, 7 Oct 2023 09:10:14 +0200 From: Greg KH To: Kyle Zeng Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: nullptr-deference in perf Message-ID: <2023100758-astronaut-comrade-9abe@gregkh> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Spam-Status: No, score=2.7 required=5.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_SBL_CSS,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on fry.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (fry.vger.email [0.0.0.0]); Sat, 07 Oct 2023 00:10:28 -0700 (PDT) X-Spam-Level: ** On Fri, Oct 06, 2023 at 10:47:57PM -0700, Kyle Zeng wrote: > Hi there, > > I found a nullptr dereference in perf subsystem and it affects at least > v5.10 and v6.1 stable trees. (the same poc cannot trigger the crash in > the mainline). Can you use 'git bisect' to find the patch that fixes this? thanks, greg k-h