From nobody Sun Jan 12 17:25:57 2025 X-Original-To: freebsd-current@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4YWMjm1s7xz5l0fC for ; Sun, 12 Jan 2025 17:25:48 +0000 (UTC) (envelope-from fbsd@www.zefox.net) Received: from www.zefox.net (www.zefox.net [50.1.20.27]) (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-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "pelorus.zefox.org", Issuer "pelorus.zefox.org" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4YWMjl1RYYz44n8 for ; Sun, 12 Jan 2025 17:25:47 +0000 (UTC) (envelope-from fbsd@www.zefox.net) Authentication-Results: mx1.freebsd.org; dkim=none; spf=none (mx1.freebsd.org: domain of fbsd@www.zefox.net has no SPF policy when checking 50.1.20.27) smtp.mailfrom=fbsd@www.zefox.net; dmarc=none Received: from www.zefox.net (localhost [127.0.0.1]) by www.zefox.net (8.18.1/8.18.1) with ESMTPS id 50CHPvqT065151 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Sun, 12 Jan 2025 09:25:57 -0800 (PST) (envelope-from fbsd@www.zefox.net) Received: (from fbsd@localhost) by www.zefox.net (8.18.1/8.18.1/Submit) id 50CHPvqS065150; Sun, 12 Jan 2025 09:25:57 -0800 (PST) (envelope-from fbsd) Date: Sun, 12 Jan 2025 09:25:57 -0800 From: bob prohaska To: freebsd-current@freebsd.org Cc: bob prohaska Subject: Re: [Bug 273566] stray characters contaminate serial console Message-ID: List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Rspamd-Queue-Id: 4YWMjl1RYYz44n8 X-Spamd-Bar: / X-Spamd-Result: default: False [0.04 / 15.00]; AUTH_NA(1.00)[]; FAKE_REPLY(1.00)[]; NEURAL_HAM_LONG(-0.99)[-0.987]; NEURAL_HAM_SHORT(-0.98)[-0.978]; NEURAL_HAM_MEDIUM(-0.89)[-0.893]; MID_RHS_WWW(0.50)[]; WWW_DOT_DOMAIN(0.50)[]; MIME_GOOD(-0.10)[text/plain]; ARC_NA(0.00)[]; TO_DN_SOME(0.00)[]; RCVD_TLS_LAST(0.00)[]; MIME_TRACE(0.00)[0:+]; MISSING_XM_UA(0.00)[]; ASN(0.00)[asn:7065, ipnet:50.1.16.0/20, country:US]; R_DKIM_NA(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_TWO(0.00)[2]; RCVD_COUNT_TWO(0.00)[2]; DMARC_NA(0.00)[zefox.net]; TO_MATCH_ENVRCPT_SOME(0.00)[]; MLMMJ_DEST(0.00)[freebsd-current@freebsd.org]; R_SPF_NA(0.00)[no SPF record] From: bob prohaska To: freebsd-kernel@freebsd.org Subject: Re: [Bug 273566] stray characters contaminate serial console On Sun, Jan 12, 2025 at 05:02:15AM +0000, bugzilla-noreply@freebsd.org wrote: > https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=273566 > > --- Comment #15 from Sulev-Madis Silber --- > you currently have more hw than i do, it's all connected up too. can you test > it out more maybe? debugging kernels, etc. i should have multi arch usb/serial > switched remote lab on my own but i don't somehow eh, despite using fbsd since Just for fun I installed a GENERIC-KASAN kernel on a Pi4 running -current, but far as I can tell the problem doesn't exist on aarch64 or I don't know how to see it. The Pi4 is providing terminal service to a Pi2 running armv7, which since the KASAN kernel went on the Pi4 hasn't suffered a boot stoppage. Neither have I seen any console messages on the Pi4 suggesting something amiss. I'm guessing kasan simply generates warnings, but if so I've not recognized any. I'll keep watching, it would really help to know what sort of behavior I'm looking for. I tried to build a kasan kernel on a pi2 running armv7 but buildworld stopped with an unrecognized symbol. It's now building world/kernel with GENERIC as a sanity check, but the kasan man page suggests armv7 is unsupported. If in fact armv7 does support kasan then I'll keep trying. Unfortunately I have only one kasan-supporting host presently but have couple spare Pi2 v1.1 boxes that can run armv7 if it's relevant. Thanks for writing, bob prohaska ps, I was mistaken, there seems to be no freebsd-kernel mailing list 8-(