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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 02CEEC87FD8 for ; Thu, 29 Aug 2024 19:47:35 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 8A9D96B008C; Thu, 29 Aug 2024 15:47:35 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 858586B0093; Thu, 29 Aug 2024 15:47:35 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 71F9C6B0095; Thu, 29 Aug 2024 15:47:35 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 553F56B008C for ; Thu, 29 Aug 2024 15:47:35 -0400 (EDT) Received: from smtpin27.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id C8714C083A for ; Thu, 29 Aug 2024 19:47:34 +0000 (UTC) X-FDA: 82506317628.27.F5CB242 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf02.hostedemail.com (Postfix) with ESMTP id 6B31780003 for ; Thu, 29 Aug 2024 19:47:32 +0000 (UTC) Authentication-Results: imf02.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=qXpHSobj; dmarc=none; spf=none (imf02.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1724960753; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=jTjFvzn4Ho0scLgC2Khpq7+5GNekXS/YOin+x/d9cp8=; b=ufiH/IBuGBeHVJsDbMqpZ4UbU5dgzI2s79rGUfIW58nhn6uXy/nPGv4zqb1dMayZnP82dW sxMkQLZnQHlY9oSKVs0vLWXAzj2aTkE5UUrxHF7+buxDYIkuV3kAlFKRyhYr88dtdJV2G7 DYUqe9KgLebypmbBs1+14pxMxeayXpI= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1724960753; a=rsa-sha256; cv=none; b=h5aDEv/kuo10U/HZhupbbzHMoxZQ3m/WWdRO7y5J4WCoTZWAGVxyZSG3QmQS6kUsx4GIkX a30v+xveN5LzNzSDhQgdnGooP7H+L2INb7vN+Tj0uetpdlkrmlfsBoy4cdXJ1J+968FmrS Ly6dmlltDpawEoHyqyuf8Eew/vfElTw= ARC-Authentication-Results: i=1; imf02.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=qXpHSobj; dmarc=none; spf=none (imf02.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Transfer-Encoding: Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date: Sender:Reply-To:Content-ID:Content-Description; bh=jTjFvzn4Ho0scLgC2Khpq7+5GNekXS/YOin+x/d9cp8=; b=qXpHSobjOpr7xS8xCe1OqBoWeP ggWj+rHAIACfILSL4O28O/mW3a3Z9iWy4IELE63mJlJ/BUl67YdvDJZTfjGFMqAxZMaxao7552m2/ /0po5BF13hEM0BKyTsZkpdkfI0ZCDhogMrlac4GwxDe+NGz5qFVFOleA45HJxSVuxf1p6zpmq48Cs LIKdBXENRjfHTHN41FafNvlgAsbiMtetLJ1oyVKtAaLw+JOSETLvtftAApUTRhzCMO4JK3avArBnH 4NafejSWsU6mNcoR6ubsd8nQHbGMCrFmf4r6D6F2zPBzKOFTAABmY/C+q+OWi19E5EjBrhDl6TjBA zvaB/q4g==; Received: from willy by casper.infradead.org with local (Exim 4.98 #2 (Red Hat Linux)) id 1sjl7C-00000002SVU-12ud; Thu, 29 Aug 2024 19:47:30 +0000 Date: Thu, 29 Aug 2024 20:47:30 +0100 From: Matthew Wilcox To: David Hildenbrand Cc: "Aithal, Srikanth" , Andrew Morton , linux-mm , Linux-Next Mailing List Subject: Re: linux-next20240827 onwards: KVM guest crash BUG: Bad page state in process ksmd Message-ID: References: <83847d6b-9533-4a5e-a2e1-763021a32b9b@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 6B31780003 X-Stat-Signature: ybehhnc1bk4ng4j43gsfahqbnnwkdpdh X-Rspam-User: X-HE-Tag: 1724960852-418804 X-HE-Meta: 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 4u0k1uhP 26kAS6IIeC/4845vz0oxIaZhqLbto3OlaQy1imd0JGIotWG8LGHbAgvr8Zlz3+cXEao8ubmaS5ssed30GH8MRs8iJTX4fgElIzAM7o0lVjKD4fWZrfFFb36QJXR4h+rzRrhd/NZEh4gwubbk6RBipHQVKpXTOEtOULmpEWJMMZYPvvNxhCxEF5A7iB+Cbs/QRX3nAAUN5VLDvok7vnd+sFx6YQpiX5lyPrqvJC4+kZXVVLccN5VVqGk6/ZsG8LYlppCXdhk0BduN3sZcUIvPbLpGOnQC2oZ9a6/cKDgBBJR6fiy4= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, Aug 29, 2024 at 04:36:21PM +0200, David Hildenbrand wrote: > On 29.08.24 13:28, Aithal, Srikanth wrote: > > Hello, > > > > Starting linux-next20240827 build, running QEMU KVM instance with option > > to freeze the CPU at the very beginning and then continue results in > > below guest crash. Disabling CONFIG_KSM will make this issue go away. > > Same issue exists with todays linux-next as well. > > > > /SecCoreStartupWithStack(0xFFFCC000, 0x820000) > > error: kvm run failed Bad address > > RAX=0000000000232000 RBX=00000000fffdb101 RCX=000000000081fab0 > > RDX=00000000fffd7b03 > > RSI=0000000000807000 RDI=00000000fffd262b RBP=000000000081fc00 > > RSP=000000000081faa0 > > R8 =00000000fffd7af7 R9 =0000000000000071 R10=0000000000400000 > > R11=0000000000000000 > > R12=00000000fffcc094 R13=00000000fffcc000 R14=00000000ffdce000 > > R15=0000000000000600 > > RIP=00000000fffd1cb5 RFL=00000087 [--S--PC] CPL=0 II=0 A20=1 SMM=0 HLT=0 > > ES =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS   [-WA] > > CS =0038 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] > > SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS   [-WA] > > DS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS   [-WA] > > FS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS   [-WA] > > GS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS   [-WA] > > LDT=0000 0000000000000000 0000ffff 00008200 DPL=0 LDT > > TR =0000 0000000000000000 0000ffff 00008b00 DPL=0 TSS64-busy > > GDT=     00000000fffffed0 0000003f > > IDT=     000000000081fd70 0000021f > > CR0=80000033 CR2=0000000000000000 CR3=0000000000800000 CR4=00000660 > > DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 > > DR3=0000000000000000 > > DR6=00000000ffff0ff0 DR7=0000000000000400 > > EFER=0000000000000500 > > Code=05 00 10 00 00 49 81 ee 00 10 00 00 48 3d 00 00 00 02 77 12 <41> 81 > > 7e 28 5f 46 56 48 75 e1 49 3b 46 20 73 05 eb d9 4d 89 ee 48 8d 8d 10 ff > > ff ff ba 02 > > / > > > > _Host dmesg throws:_ > > > > /[  232.158038] BUG: Bad page state in process ksmd pfn:404740a > > [  232.164393] page: refcount:0 mapcount:1 mapping:0000000000000000 > > index:0x7f8687c0a pfn:0x404740a > > [  232.164401] flags: 0x17ffffc0020819(locked|uptodate|dirty|owner_2|swapbacked|node=0|zone=2|lastcpupid=0x1fffff) > > [  232.164412] raw: 0017ffffc0020819 dead000000000100 dead000000000122 > > 0000000000000000 > > [  232.164417] raw: 00000007f8687c0a 0000000000000000 0000000000000000 > > 0000000000000000 > > [  232.164420] page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set > > Might be related to Willy's page flag rework. Not 100% sure, though, what's > happening here. > > Is there a way to revert the recent changes from Willy to > include/linux/page-flags.h and see if the problem goes away? Looks like the same signature as https://lore.kernel.org/linux-mm/yt9dttf3r49e.fsf@linux.ibm.com/