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=-7.5 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,T_DKIMWL_WL_HIGH,USER_AGENT_MUTT 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 72C5EC28CC5 for ; Wed, 5 Jun 2019 16:59:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 365712075B for ; Wed, 5 Jun 2019 16:59:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1559753942; bh=abNYLIeAra2a5OtLn3uGtszbHHq45rjOhZwqFwLARrM=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=VkC9J5pfu+Ll4nx6XyOehyietdy5O4OBv3IGXpUk1KZghl6+nKsB6iMZGXg5Az8Xt 7QIQTC5T3kNILchDLLzxMpiDJ0tpCDMDyO9nWyOg3JztmB30Fpzg3UhvOgifMOofUN a7X7jQKeRqaqHrc8PcL4ZqaLPyeuz1xM1uLPWW2U= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728741AbfFEQ7B (ORCPT ); Wed, 5 Jun 2019 12:59:01 -0400 Received: from mail.kernel.org ([198.145.29.99]:37836 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728570AbfFEQ7B (ORCPT ); Wed, 5 Jun 2019 12:59:01 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 513C82075B; Wed, 5 Jun 2019 16:59:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1559753940; bh=abNYLIeAra2a5OtLn3uGtszbHHq45rjOhZwqFwLARrM=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Via+BNtdcdGV4661jr/rexdWSNRn9Z5QCyfxjT37ucMVWdpOJVEhZsEih82v259KY Kw+zx3uI63N2gVA8vuQEt8icFtKmo5SUd2DAwOPydrJ6lnBn0LgBc3bt/ErhTb4EIz SDsz6goeBocKjP8jeKIANfFAnLOkipt2x+w1Tgeg= Date: Wed, 5 Jun 2019 18:58:57 +0200 From: Greg KH To: Vladimir Yerilov Cc: linux-usb@vger.kernel.org Subject: Re: kernel NULL pointer dereference, ucsi bug Message-ID: <20190605165857.GA23286@kroah.com> References: <20190603131258.GA10397@kroah.com> <20190604054045.GD1588@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.12.0 (2019-05-25) Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org On Wed, Jun 05, 2019 at 04:36:23PM +1000, Vladimir Yerilov wrote: > Good day Mr. Kroah-Hartman, > > I've found the culprit commit. It took a while though but now I'm sure: > > commit - brief decription - time - works (y) or not (n) > 670784fb4ebe54434e263837390e358405031d9e - rc1 2019-05-20 > e260ad01f0aa9e96b5386d5cd7184afd949dc457 - rc0 2019-05-14 19:52:51 -0700 n > 8ea5b2abd07e2280a332bd9c1a7f4dd15b9b6c13 - rc0 2019-05-09 19:35:41 -0700 n > 54516da1ea859dd4f56ebba2e483d2df9d7c8a32 - rc0 2019-05-05 21:58:36 -0700 y > 71ae5fc87c34ecbdca293c2a5c563d6be2576558 - rc0 2019-05-06 20:29:45 -0700 y > 80f232121b69cc69a31ccb2b38c1665d770b0710 - rc0 2019-05-07 22:03:58 -0700 y > a2d635decbfa9c1e4ae15cb05b68b2559f7f827c - rc0 2019-05-08 21:35:19 -0700 n > 132d68d37d33f1d0b9c1f507c8b4d64c27ecec8a - rc0 2019-05-08 10:03:52 -0700 n > 86dc59e39031fb0d366d5b1f92db015b24bef70b - rc0 2019-05-08 09:46:44 -0700 y > > So 86dc59e39031fb0d366d5b1f92db015b24bef70b is the last working for > me, and 132d68d37d33f1d0b9c1f507c8b4d64c27ecec8a is the breaking one: > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v5.2-rc3&id=132d68d37d33f1d0b9c1f507c8b4d64c27ecec8a 132d68d37d33 ("Merge tag 'usb-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb") is a merge point, which is odd, you should be able to drop down into that and find the exact wrong commit. what does 'git bisect log' show? thanks, greg k-h