From owner-freebsd-current@freebsd.org Fri Feb 15 17:52:54 2019 Return-Path: Delivered-To: freebsd-current@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id B4D4F14E27F8 for ; Fri, 15 Feb 2019 17:52:54 +0000 (UTC) (envelope-from sgk@troutmask.apl.washington.edu) Received: from troutmask.apl.washington.edu (troutmask.apl.washington.edu [128.95.76.21]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "troutmask", Issuer "troutmask" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 7E5647464A; Fri, 15 Feb 2019 17:52:52 +0000 (UTC) (envelope-from sgk@troutmask.apl.washington.edu) Received: from troutmask.apl.washington.edu (localhost [127.0.0.1]) by troutmask.apl.washington.edu (8.15.2/8.15.2) with ESMTPS id x1FHqo7J010127 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Fri, 15 Feb 2019 09:52:50 -0800 (PST) (envelope-from sgk@troutmask.apl.washington.edu) Received: (from sgk@localhost) by troutmask.apl.washington.edu (8.15.2/8.15.2/Submit) id x1FHqob6010126; Fri, 15 Feb 2019 09:52:50 -0800 (PST) (envelope-from sgk) Date: Fri, 15 Feb 2019 09:52:50 -0800 From: Steve Kargl To: Andriy Gapon Cc: John Baldwin , freebsd-current@freebsd.org Subject: Re: Panic in sys_fstatat() Message-ID: <20190215175250.GA10070@troutmask.apl.washington.edu> Reply-To: sgk@troutmask.apl.washington.edu References: <20190214024703.GA51003@troutmask.apl.washington.edu> <786f8034-b3ef-54cb-043b-e189e752b18b@FreeBSD.org> <03a9628d-9101-c9c4-fb4a-96bc57308c38@FreeBSD.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <03a9628d-9101-c9c4-fb4a-96bc57308c38@FreeBSD.org> User-Agent: Mutt/1.11.2 (2019-01-07) X-Rspamd-Queue-Id: 7E5647464A X-Spamd-Bar: ++ Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [2.51 / 15.00]; ARC_NA(0.00)[]; HAS_REPLYTO(0.00)[sgk@troutmask.apl.washington.edu]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; RCVD_TLS_LAST(0.00)[]; DMARC_NA(0.00)[washington.edu]; AUTH_NA(1.00)[]; REPLYTO_ADDR_EQ_FROM(0.00)[]; NEURAL_HAM_LONG(-0.09)[-0.087,0]; RCVD_COUNT_THREE(0.00)[3]; IP_SCORE(0.09)[ip: (0.17), ipnet: 128.95.0.0/16(0.23), asn: 73(0.10), country: US(-0.07)]; NEURAL_SPAM_SHORT(0.93)[0.935,0]; RCVD_IN_DNSWL_MED(-0.20)[21.76.95.128.list.dnswl.org : 127.0.11.2]; MX_GOOD(-0.01)[cached: troutmask.apl.washington.edu]; NEURAL_SPAM_MEDIUM(0.89)[0.886,0]; R_SPF_NA(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:73, ipnet:128.95.0.0/16, country:US]; MID_RHS_MATCH_FROM(0.00)[] X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.29 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: Fri, 15 Feb 2019 17:52:54 -0000 On Fri, Feb 15, 2019 at 09:50:55AM +0200, Andriy Gapon wrote: > > So, I suspect something exotic like some sort of a stack alignment issue, or a > CPU bug, or a mismatch between object files, or some local experiment, etc. > You might be right about something exotic. It is an old laptop, so it could be showing signs of hardware failure. I'm also unfortuntely trying to solve an issue with drm-legacy-kmod. In building several different kernels over a few different revisions of -current, I seem to have jump across the introduction of ifunc into the linkers. I'll see if I can come up with a repeatable method for causing the panic. -- Steve