From owner-freebsd-current@freebsd.org Thu Jun 11 13:21:40 2020 Return-Path: Delivered-To: freebsd-current@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 59B543303D6 for ; Thu, 11 Jun 2020 13:21:40 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from mailman.nyi.freebsd.org (unknown [127.0.1.3]) by mx1.freebsd.org (Postfix) with ESMTP id 49jPdc0Hhnz4cCJ for ; Thu, 11 Jun 2020 13:21:40 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: by mailman.nyi.freebsd.org (Postfix) id 09ED6330177; Thu, 11 Jun 2020 13:21:40 +0000 (UTC) Delivered-To: current@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 09B99330176 for ; Thu, 11 Jun 2020 13:21:40 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from kib.kiev.ua (kib.kiev.ua [IPv6:2001:470:d5e7:1::1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 49jPdb2s6lz4c9G for ; Thu, 11 Jun 2020 13:21:39 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from tom.home (kib@localhost [127.0.0.1]) by kib.kiev.ua (8.15.2/8.15.2) with ESMTPS id 05BDLTPb095788 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO) for ; Thu, 11 Jun 2020 16:21:32 +0300 (EEST) (envelope-from kostikbel@gmail.com) DKIM-Filter: OpenDKIM Filter v2.10.3 kib.kiev.ua 05BDLTPb095788 Received: (from kostik@localhost) by tom.home (8.15.2/8.15.2/Submit) id 05BDLTfP095787 for current@freebsd.org; Thu, 11 Jun 2020 16:21:29 +0300 (EEST) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: tom.home: kostik set sender to kostikbel@gmail.com using -f Date: Thu, 11 Jun 2020 16:21:29 +0300 From: Konstantin Belousov To: current@freebsd.org Subject: Re: Panic "vm_fault_lookup: fault on nofault entry" amd64 r362008 -> r362045 Message-ID: <20200611132129.GL48478@kib.kiev.ua> References: <20200611130500.GW1392@albert.catwhisker.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200611130500.GW1392@albert.catwhisker.org> X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,BAYES_00, DKIM_ADSP_CUSTOM_MED,FORGED_GMAIL_RCVD,FREEMAIL_FROM, NML_ADSP_CUSTOM_MED autolearn=no autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on tom.home X-Rspamd-Queue-Id: 49jPdb2s6lz4c9G X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; none X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; ASN(0.00)[asn:6939, ipnet:2001:470::/32, country:US] X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Jun 2020 13:21:40 -0000 On Thu, Jun 11, 2020 at 06:05:00AM -0700, David Wolfskill wrote: > Build machine (mini-tower) performed the update (r362008 -> r362045) > without issue, but my laptop panicked quite early on -- before the dump > device was configured. > > I have taken and placed a couple of screen shots in > http://www.catwhisker.org/~david/FreeBSD/head/r362045/ > > Looking at the displayed backtrace, I see: > > --- trap 0xc ... > futex_xchgl_reslover() > elf_reloc_internal() > link_elf_reloc_local() > link_elf_link_preload_finish() > linker_preload() > mi_startup() > > Any clues? I'm hapy to poke at it or try patches. > > Booting from kernel.old (r362008) still works: > FreeBSD g1-55.catwhisker.org 13.0-CURRENT FreeBSD 13.0-CURRENT #46 r362008M/362008: Wed Jun 10 04:19:33 PDT 2020 root@g1-55.catwhisker.org:/common/S4/obj/usr/src/amd64.amd64/sys/CANARY amd64 1300097 1300097 The link times out. There is not much to access in futex_xchgl_resolver() except for the data segment. Without full panic message and disassemble of your instance of futex_xchgl_resolver() it is not possible to ee what is going on. Just in case, can you try clean build, if you did -DNO_CLEAN ?