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 CEE30C4345F for ; Fri, 26 Apr 2024 04:39:21 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 2CC6D6B0087; Fri, 26 Apr 2024 00:39:21 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 27A7E6B0088; Fri, 26 Apr 2024 00:39:21 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 143836B008A; Fri, 26 Apr 2024 00:39:21 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id EAD6E6B0087 for ; Fri, 26 Apr 2024 00:39:20 -0400 (EDT) Received: from smtpin06.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id 6BAB4812B3 for ; Fri, 26 Apr 2024 04:39:20 +0000 (UTC) X-FDA: 82050428880.06.335C4A6 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by imf05.hostedemail.com (Postfix) with ESMTP id B03B5100007 for ; Fri, 26 Apr 2024 04:39:17 +0000 (UTC) Authentication-Results: imf05.hostedemail.com; dkim=pass header.d=ibm.com header.s=pp1 header.b=HpCOPiA+; spf=pass (imf05.hostedemail.com: domain of sourabhjain@linux.ibm.com designates 148.163.158.5 as permitted sender) smtp.mailfrom=sourabhjain@linux.ibm.com; dmarc=pass (policy=none) header.from=ibm.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1714106358; 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=aViMWIf6OQOgii17xv6pXgOTqgM9G+MDQzAPoG3IiTQ=; b=Qsf5Y7X2fvCX2ZfCpciWb3sRuOxNNNFVV80F3DKZ7NMEz4ACIPucDsVr+wCHXH7ctFh3gE ncWCMDB0oRZRJrKclD3ga343nxGGriHM4UW0+l9Eo6Sd5qQDPR6XdVf6y82604vnJHm3ok mtKdGijl5vVpIcHA9iJNO/dORsiAPXY= ARC-Authentication-Results: i=1; imf05.hostedemail.com; dkim=pass header.d=ibm.com header.s=pp1 header.b=HpCOPiA+; spf=pass (imf05.hostedemail.com: domain of sourabhjain@linux.ibm.com designates 148.163.158.5 as permitted sender) smtp.mailfrom=sourabhjain@linux.ibm.com; dmarc=pass (policy=none) header.from=ibm.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1714106358; a=rsa-sha256; cv=none; b=eTVkV/unk70LHzgNGBE4hmSpBJj3mupgqr0qg0kEkVWRjORCwgDTXMwsof+UZuKkdElqF8 KC8axCYjQgKzJ84/1j6v9t7vIQLaj76JS9mitXIaM8/so8Z07p0ZNDKy2HVSA9Ta5EaIhR 5VkYLlcvHdNLsA4wE9iMuZt9s3ZU5mY= Received: from pps.filterd (m0353725.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 43Q4c0aY011972; Fri, 26 Apr 2024 04:39:10 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=message-id : date : subject : to : cc : references : from : in-reply-to : content-type : content-transfer-encoding : mime-version; s=pp1; bh=aViMWIf6OQOgii17xv6pXgOTqgM9G+MDQzAPoG3IiTQ=; b=HpCOPiA+1+pAJr++vIUohAuym65T19q3bTkuQ9zHb8sx7fAFIJrb0zXdMnIZCUFDd5ok S0mtOLueTdEsHbsRWXO4vFfzDO71CeVktDVrEwv9tiCK5ilzkm9RRl//hSJfNflvKPJF vsyAPqYr1VAj3WXxiSyrIEa5Kg5xNQ5iWUkcbg3i4RGU14dmOpIozCPn2xrklYWxcv46 APqxxt+TVXrBJ0qazZlHAZ2SpYc+Opt+vE8lF/RB3oCEJK4udmQ1vya2GbBelx1FXql2 +RA5UT8pmo3L5MNRq0yqlBU6koJG8J8oArFKJvpusD3FacyB+5a+PCBFhIFFU++maAp7 kg== 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 3xr5dh8025-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 26 Apr 2024 04:39:09 +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 43Q39b95005352; Fri, 26 Apr 2024 04:39:09 GMT Received: from smtprelay04.fra02v.mail.ibm.com ([9.218.2.228]) by ppma13.dal12v.mail.ibm.com (PPS) with ESMTPS id 3xmx3cvgac-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 26 Apr 2024 04:39:09 +0000 Received: from smtpav01.fra02v.mail.ibm.com (smtpav01.fra02v.mail.ibm.com [10.20.54.100]) by smtprelay04.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 43Q4d57o28246694 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 26 Apr 2024 04:39:07 GMT Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8BCB920043; Fri, 26 Apr 2024 04:39:05 +0000 (GMT) Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 17B1620040; Fri, 26 Apr 2024 04:39:04 +0000 (GMT) Received: from [9.43.4.62] (unknown [9.43.4.62]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 26 Apr 2024 04:39:03 +0000 (GMT) Message-ID: <4b89fead-5d26-4aa1-b424-8ba4306a0905@linux.ibm.com> Date: Fri, 26 Apr 2024 10:09:02 +0530 User-Agent: Mozilla Thunderbird Subject: Re: [linux-next:master 7646/8170] arch/powerpc/kexec/crash.c:488:2-8: WARNING: NULL check before some freeing functions is not needed. To: kernel test robot Cc: oe-kbuild-all@lists.linux.dev, Linux Memory Management List , Michael Ellerman References: <202404261048.skfV5DDB-lkp@intel.com> Content-Language: en-US From: Sourabh Jain In-Reply-To: <202404261048.skfV5DDB-lkp@intel.com> Content-Type: text/plain; charset=UTF-8; format=flowed X-TM-AS-GCONF: 00 X-Proofpoint-GUID: YHWvgYZdkJEfQwWIRPrXCxammuyqlEYW X-Proofpoint-ORIG-GUID: YHWvgYZdkJEfQwWIRPrXCxammuyqlEYW Content-Transfer-Encoding: 7bit X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1011,Hydra:6.0.650,FMLib:17.11.176.26 definitions=2024-04-26_04,2024-04-25_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 suspectscore=0 clxscore=1011 mlxscore=0 lowpriorityscore=0 adultscore=0 spamscore=0 mlxlogscore=999 malwarescore=0 priorityscore=1501 impostorscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2404010000 definitions=main-2404260028 X-Stat-Signature: 4f3yb9ofm4fqxfjjmk5qcwje7wjbpsn1 X-Rspamd-Queue-Id: B03B5100007 X-Rspamd-Server: rspam02 X-Rspam-User: X-HE-Tag: 1714106357-519054 X-HE-Meta: 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 xPKlzcqN PdyAlsx9WPBBes8a85nboSATQJAhNEfCFBvUJpeeIQnwHgMKtH/tQR2kWMS759oBBO6Ji2sv+t9spRUBbXFJYL9gF1BTYIzCp8Sy+/lO6Tbr0fkCk42Cme3x/4Wzya49JIdLc2WT0WYWGgKsj0RsQlUIiDgonRP2uhG4qHdNUPx0YUZXI+eS5Vg+LU/cVsn2/23M1g/AJ5LZrMRsftNfwdmGEzJmn6gKU2B99pCL3K9shuOosllSQ8sJ2CFvo8rvVZJe3kszQWc5F7bsdmT3tdQQzSk52HiRfYD8iRtvlyRC5P8CzAF1JQBhz9zPWBaiG/Z2FJWJGGRV6HVcFqvn9j4dJ8lQi3PR8lQhF8Ts0eUQFjm7A2WqffahsiEujvAcpdBsvzdCwf6LDjUUzy/YwdgIt2EylXShd/IGz5e5WKMvSxbF0De/VsQQwbw== 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 26/04/24 07:57, kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > head: 5e4f84f18c4ee9b0ccdc19e39b7de41df21699dd > commit: 849599b702ef8977fcd5b2f27c61ef773c42bb88 [7646/8170] powerpc/crash: add crash memory hotplug support > config: powerpc-randconfig-r061-20240426 (https://download.01.org/0day-ci/archive/20240426/202404261048.skfV5DDB-lkp@intel.com/config) > compiler: powerpc-linux-gcc (GCC) 13.2.0 > > If you fix the issue in a separate patch/commit (i.e. not just a new version of > the same patch/commit), kindly add following tags > | Reported-by: kernel test robot > | Closes: https://lore.kernel.org/oe-kbuild-all/202404261048.skfV5DDB-lkp@intel.com/ > > cocci warnings: (new ones prefixed by >>) >>> arch/powerpc/kexec/crash.c:488:2-8: WARNING: NULL check before some freeing functions is not needed. > vim +488 arch/powerpc/kexec/crash.c > > 418 > 419 /** > 420 * update_crash_elfcorehdr() - Recreate the elfcorehdr and replace it with old > 421 * elfcorehdr in the kexec segment array. > 422 * @image: the active struct kimage > 423 * @mn: struct memory_notify data handler > 424 */ > 425 static void update_crash_elfcorehdr(struct kimage *image, struct memory_notify *mn) > 426 { > 427 int ret; > 428 struct crash_mem *cmem = NULL; > 429 struct kexec_segment *ksegment; > 430 void *ptr, *mem, *elfbuf = NULL; > 431 unsigned long elfsz, memsz, base_addr, size; > 432 > 433 ksegment = &image->segment[image->elfcorehdr_index]; > 434 mem = (void *) ksegment->mem; > 435 memsz = ksegment->memsz; > 436 > 437 ret = get_crash_memory_ranges(&cmem); > 438 if (ret) { > 439 pr_err("Failed to get crash mem range\n"); > 440 return; > 441 } > 442 > 443 /* > 444 * The hot unplugged memory is part of crash memory ranges, > 445 * remove it here. > 446 */ > 447 if (image->hp_action == KEXEC_CRASH_HP_REMOVE_MEMORY) { > 448 base_addr = PFN_PHYS(mn->start_pfn); > 449 size = mn->nr_pages * PAGE_SIZE; > 450 ret = remove_mem_range(&cmem, base_addr, size); > 451 if (ret) { > 452 pr_err("Failed to remove hot-unplugged memory from crash memory ranges\n"); > 453 goto out; > 454 } > 455 } > 456 > 457 ret = crash_prepare_elf64_headers(cmem, false, &elfbuf, &elfsz); > 458 if (ret) { > 459 pr_err("Failed to prepare elf header\n"); > 460 goto out; > 461 } > 462 > 463 /* > 464 * It is unlikely that kernel hit this because elfcorehdr kexec > 465 * segment (memsz) is built with addition space to accommodate growing > 466 * number of crash memory ranges while loading the kdump kernel. It is > 467 * Just to avoid any unforeseen case. > 468 */ > 469 if (elfsz > memsz) { > 470 pr_err("Updated crash elfcorehdr elfsz %lu > memsz %lu", elfsz, memsz); > 471 goto out; > 472 } > 473 > 474 ptr = __va(mem); > 475 if (ptr) { > 476 /* Temporarily invalidate the crash image while it is replaced */ > 477 xchg(&kexec_crash_image, NULL); > 478 > 479 /* Replace the old elfcorehdr with newly prepared elfcorehdr */ > 480 memcpy((void *)ptr, elfbuf, elfsz); > 481 > 482 /* The crash image is now valid once again */ > 483 xchg(&kexec_crash_image, image); > 484 } > 485 out: > 486 kvfree(cmem); > 487 if (elfbuf) > > 488 kvfree(elfbuf); > 489 } > 490 Thanks for the report. I will fix this and send next version. - Sourabh Jain