From nobody Sun Feb 8 07:40:26 2026 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 DBD0BC433F5 for ; Sun, 2 Oct 2022 10:45:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229912AbiJBKp1 (ORCPT ); Sun, 2 Oct 2022 06:45:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36566 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229864AbiJBKoz (ORCPT ); Sun, 2 Oct 2022 06:44:55 -0400 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8859B3FECF for ; Sun, 2 Oct 2022 03:44:26 -0700 (PDT) Received: from pps.filterd (m0098409.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 29292lsO000969; Sun, 2 Oct 2022 10:44:12 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=Ms4JzvzezU1WSWXx+goApoM8T5CU3BXIVv8NBjXF9Nc=; b=co9/w5K/ahSx4GJb3jKoLl1eBAfBJSktTXGhnLJmNq1NLllh64IsHPwzkvHsAmH6F2PK LEIEuoIviktwDvI6EqF8EMQxJYLhmVo+0AoPhst7qtCYumefBFATuL418/UYz32N8nJA cA7UX5Pdq3iEkljtsWY2WYhxSL9lm2NLldK8hD1OA5K4GfFlDhQhkWUf6TyM1lrc0qOI yREFovxBCClPhgYhmB3eireMR6YYYNGzbF8QiIQ53ywrBOGt6SB4XYrxRH05k1YPUn1V oZml9y8M4H9THT49hCpHtQmQyKSLK5T2WUPHf1YiXohadBk5/wAzq4js3N1LNf+X1Vq8 rg== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3jxxuv9stk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sun, 02 Oct 2022 10:44:11 +0000 Received: from m0098409.ppops.net (m0098409.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 292AbRuN016899; Sun, 2 Oct 2022 10:44:11 GMT Received: from ppma03fra.de.ibm.com (6b.4a.5195.ip4.static.sl-reverse.com [149.81.74.107]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3jxxuv9st0-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sun, 02 Oct 2022 10:44:11 +0000 Received: from pps.filterd (ppma03fra.de.ibm.com [127.0.0.1]) by ppma03fra.de.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 292Aawjk031295; Sun, 2 Oct 2022 10:44:08 GMT Received: from b06avi18626390.portsmouth.uk.ibm.com (b06avi18626390.portsmouth.uk.ibm.com [9.149.26.192]) by ppma03fra.de.ibm.com with ESMTP id 3jxd68ry96-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sun, 02 Oct 2022 10:44:08 +0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06avi18626390.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 292Adg2r49152292 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 2 Oct 2022 10:39:42 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5EC6152050; Sun, 2 Oct 2022 10:44:06 +0000 (GMT) Received: from li-c3569c4c-1ef8-11b2-a85c-ee139cda3133.ibm.com.com (unknown [9.43.71.20]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id B96875204E; Sun, 2 Oct 2022 10:44:02 +0000 (GMT) From: Sathvika Vasireddy To: linuxppc-dev@lists.ozlabs.org Cc: jpoimboe@redhat.com, peterz@infradead.org, linux-kernel@vger.kernel.org, aik@ozlabs.ru, mpe@ellerman.id.au, mingo@redhat.com, christophe.leroy@csgroup.eu, rostedt@goodmis.org, mbenes@suse.cz, npiggin@gmail.com, chenzhongjin@huawei.com, naveen.n.rao@linux.vnet.ibm.com, sv@linux.ibm.com Subject: [PATCH v4 08/16] objtool: Fix SEGFAULT Date: Sun, 2 Oct 2022 16:12:32 +0530 Message-Id: <20221002104240.1316480-9-sv@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20221002104240.1316480-1-sv@linux.ibm.com> References: <20221002104240.1316480-1-sv@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: qs_gTw61sfl9brztelJwRL2L3648iRKz X-Proofpoint-GUID: q8QAX2R2rJ8IS9sgxCmsvIcRrM1eGsjQ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.528,FMLib:17.11.122.1 definitions=2022-10-01_15,2022-09-29_03,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 phishscore=0 clxscore=1015 malwarescore=0 impostorscore=0 suspectscore=0 spamscore=0 mlxlogscore=995 adultscore=0 priorityscore=1501 mlxscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2209130000 definitions=main-2210020068 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Christophe Leroy find_insn() will return NULL in case of failure. Check insn in order to avoid a kernel Oops for NULL pointer dereference. Acked-by: Peter Zijlstra (Intel) Signed-off-by: Christophe Leroy --- tools/objtool/check.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/objtool/check.c b/tools/objtool/check.c index e55fdf952a3a..fe935f19447b 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -207,7 +207,7 @@ static bool __dead_end_function(struct objtool_file *fi= le, struct symbol *func, return false; =20 insn =3D find_insn(file, func->sec, func->offset); - if (!insn->func) + if (!insn || !insn->func) return false; =20 func_for_each_insn(file, func, insn) { --=20 2.31.1