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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9CCC1C001DB for ; Mon, 7 Aug 2023 06:09:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231138AbjHGGJY (ORCPT ); Mon, 7 Aug 2023 02:09:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60114 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229640AbjHGGJW (ORCPT ); Mon, 7 Aug 2023 02:09:22 -0400 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D6D9310F9 for ; Sun, 6 Aug 2023 23:09:21 -0700 (PDT) Received: from pps.filterd (m0353727.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 37760gNX022469; Mon, 7 Aug 2023 06:08:53 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : references : date : in-reply-to : message-id : mime-version : content-type; s=pp1; bh=8lC68q+3Etjcpz76NeQMAydEwaS4UejuJGfrWFBuZ18=; b=OLklORmIOKQpJsMe1pLFOtL6A+RvHGb2jpFgF5KxYnZLhqnd7hkaoju9/A2VqNM6BKuf ITc3lN1j6RQTwBTUv6Nup1LZaNcUM+3QBJENqxeV0VPiwVJ+GN3CFDB5wzbYijrrCX6A zyTsu6WxRu+ZiRgehsAegNfbuhnkXRxWeoubU6iMMXOyKuquzy+18w43GyMHM/Kmr4td 6o9uvOvdW2CtLZK5swLcFvxugERzg0e9rA0uH04HNCfQpXDRCxiZEpHh2yHGCTHCczBA 0BaXUT/gp3cv7hP2sAiXU8bl8klc5wX+li/OjC8tEDG6DfI1AoOwoIK7tEcHvFDA+4n5 UA== Received: from ppma13.dal12v.mail.ibm.com (dd.9e.1632.ip4.static.sl-reverse.com [50.22.158.221]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3satyhg96c-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 07 Aug 2023 06:08:52 +0000 Received: from pps.filterd (ppma13.dal12v.mail.ibm.com [127.0.0.1]) by ppma13.dal12v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 3774tDBl001597; Mon, 7 Aug 2023 06:08:52 GMT Received: from smtprelay01.fra02v.mail.ibm.com ([9.218.2.227]) by ppma13.dal12v.mail.ibm.com (PPS) with ESMTPS id 3sa2yjj4er-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 07 Aug 2023 06:08:51 +0000 Received: from smtpav06.fra02v.mail.ibm.com (smtpav06.fra02v.mail.ibm.com [10.20.54.105]) by smtprelay01.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 37768opB1639122 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 7 Aug 2023 06:08:50 GMT Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3A41B2004D; Mon, 7 Aug 2023 06:08:50 +0000 (GMT) Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 167BC20049; Mon, 7 Aug 2023 06:08:50 +0000 (GMT) Received: from tuxmaker.linux.ibm.com (unknown [9.152.85.9]) by smtpav06.fra02v.mail.ibm.com (Postfix) with ESMTPS; Mon, 7 Aug 2023 06:08:50 +0000 (GMT) From: Sven Schnelle To: Steven Rostedt Cc: linux-kernel@vger.kernel.org Subject: Re: BUG: KASAN: slab-out-of-bounds in print_synth_event+0xa68/0xa78 References: <20230804115033.34c2b5af@gandalf.local.home> <20230804133601.40cb5fe9@gandalf.local.home> Date: Mon, 07 Aug 2023 08:08:49 +0200 In-Reply-To: <20230804133601.40cb5fe9@gandalf.local.home> (Steven Rostedt's message of "Fri, 4 Aug 2023 13:36:01 -0400") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: HWi_FLwC-oz-O_BaiBR_fCVOMLXPK7YA X-Proofpoint-GUID: HWi_FLwC-oz-O_BaiBR_fCVOMLXPK7YA X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-08-07_04,2023-08-03_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 spamscore=0 adultscore=0 clxscore=1015 mlxscore=0 lowpriorityscore=0 malwarescore=0 priorityscore=1501 impostorscore=0 suspectscore=0 phishscore=0 mlxlogscore=906 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2308070055 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Steven Rostedt writes: > On Fri, 04 Aug 2023 18:32:48 +0200 > Sven Schnelle wrote: > >> > Can you show where exactly the above line is? >> >> It is: >> >> (gdb) list *(print_synth_event+0xa68) >> 0x5e4f60 is in print_synth_event (/home/svens/ibmgit/linux/kernel/trace/trace_events_synth.c:410). >> 405 p = (void *)entry + data_offset; >> 406 end = (void *)p + len - (sizeof(long) - 1); >> 407 >> 408 trace_seq_printf(s, "%s=STACK:\n", se->fields[i]->name); >> 409 >> 410 for (; *p && p < end; p++) > > I think that conditional needs to be swapped. Can you test the following > change and see if the problem disappears? Unfortunately that doesn't change anything, still exactly the same splat.