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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 30 Jan 2020 12:00:02 -0000 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 00UC02uR41943280 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 30 Jan 2020 12:00:02 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 02343A4059; Thu, 30 Jan 2020 12:00:02 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0A4B3A4057; Thu, 30 Jan 2020 12:00:01 +0000 (GMT) Received: from linux.ibm.com (unknown [9.148.59.112]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Thu, 30 Jan 2020 12:00:00 +0000 (GMT) Date: Thu, 30 Jan 2020 13:59:59 +0200 From: Mike Rapoport To: Borislav Petkov Cc: Damian Tometzki , Linus Torvalds , "Luck, Tony" , Ingo Molnar , Linux Kernel Mailing List , Thomas Gleixner , Borislav Petkov , Peter Zijlstra , Andrew Morton Subject: Re: [GIT PULL] x86/asm changes for v5.6 References: <20200129132618.GA30979@zn.tnic> <20200129170725.GA21265@agluck-desk2.amr.corp.intel.com> <20200129183404.GB30979@zn.tnic> <20200130075549.GA6684@zn.tnic> <20200130111057.GA21459@linux.ibm.com> <20200130115326.GG6684@zn.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20200130115326.GG6684@zn.tnic> X-TM-AS-GCONF: 00 x-cbid: 20013012-0012-0000-0000-000003822555 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20013012-0013-0000-0000-000021BE7F9A Message-Id: <20200130115959.GA24611@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-01-30_03:2020-01-28,2020-01-30 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 mlxlogscore=859 clxscore=1015 adultscore=0 phishscore=0 suspectscore=0 malwarescore=0 priorityscore=1501 spamscore=0 mlxscore=0 lowpriorityscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1911200001 definitions=main-2001300089 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jan 30, 2020 at 12:53:26PM +0100, Borislav Petkov wrote: > On Thu, Jan 30, 2020 at 01:10:57PM +0200, Mike Rapoport wrote: > > It seems that this a random boot crash caused by 987f028b8637cfa7 ("char: > > hpet: Use flexible-array member") and fix is on the way: > > > > https://lore.kernel.org/lkml/202001300450.00U4ocvS083098@www262.sakura.ne.jp/ > > Hmm, I don't see the connection at a first glance except that both stack > traces lead somewhere down the bowels of k*alloc... I've seen similar crash with my qemu/kvm and bisected it to that commit. The hpet allocation is off-by-one and as a result hpet corrupts the memory somewhere in the slab > -- > Regards/Gruss, > Boris. > > SUSE Software Solutions Germany GmbH, GF: Felix Imend?rffer, HRB 36809, AG N?rnberg -- Sincerely yours, Mike.