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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 900B7C2D0CD for ; Mon, 19 May 2025 18:07:46 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4b1QdX680Vz2yk3; Tue, 20 May 2025 04:07:44 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=148.163.156.1 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1747678064; cv=none; b=jKjFU2NRk6YANdpSrKQRYDhKckk5rZQKdzUANsgh18bL9AsEf3KCzXPzKeVH79kq+6syraZLK3/rUl6usZTAxJn8/hYV0pwHhqzGbVCm38O/w2RyCHLQbYW8c+aRadTAjwLB8SgdKy9UGuCWJUXa1zjnnNKJGQOgHDgDUwsbw32K7i2SVoqadcyDMbmOAuHcVn9A8+JFH56c5RYAOB4rnOpLBLkCKrkp9/KXlkJU9pQcUNnAtQJrNXUsUd+HXg2H5Yny4qf3S3b4OuRWib2cTZOjB8PKsD70Ftv62baoFbgy/eHrkbMuCvi5aCZL6CyuOtmmClOWlrwo84mt/qtB2Q== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1747678064; c=relaxed/relaxed; bh=ynTozMTkisgWm7nLVFPVfSuICeiaDry/u5m5nFTRhCQ=; h=MIME-Version:Date:From:To:Cc:Subject:In-Reply-To:References: Message-ID:Content-Type; b=WsTb+ohveIBs+cIddaJZwhIrKrGbOPXDA2U1Pia+/JyvoRvxXSTJvP6ZqpXD3JkOBMCgHqtP+AU0wW2LX3DqxOqPlyH9cZo5SkSkgr07mVb4mf4xRs/XmSbehJhJDcv2vOwYZpETV8dhjTqCgzsrRO3+bvcQcplhOf6L8SC4CNCRsCWEhXg/Kznqt2PMjNxZ94tVbL2yhdvuMTgFud+2/6Jkmeaoe5Zd8v84+QwwoRT/t9L7To0Ci6zYhla7tZQUas0NCaTXw+evCr/vfRJsuqw015Xt89n8A2CwnsOXKJS4oOPSMImMdm2n3Y7OuUBNnLO50Pf7hO/Jc43DH+owSw== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=hse0VHlA; dkim-atps=neutral; spf=pass (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=misanjum@linux.ibm.com; receiver=lists.ozlabs.org) smtp.mailfrom=linux.ibm.com Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=hse0VHlA; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=misanjum@linux.ibm.com; receiver=lists.ozlabs.org) Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4b1QdS1WWNz2ydv for ; Tue, 20 May 2025 04:07:39 +1000 (AEST) Received: from pps.filterd (m0356517.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 54JFQ9vj031505; Mon, 19 May 2025 18:07:18 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=pp1; bh=ynTozM TkisgWm7nLVFPVfSuICeiaDry/u5m5nFTRhCQ=; b=hse0VHlAxrCKal/Re3pBAL fGX8SVKxGOvJJeoYmqzR+U9C7FU4NVHRFV9YhLzvGRAdlf5W+E9ESXRXxPbHMNBg fFSQvF0ghDD6paDP+h3NPIS6FvWzTABC+PwATUidobKKkiCWPHDXwex98k99SgsC m1yDQ0SrwPxT+hjBf4UzIxdDfpDeQjyqvwoKWmbf8ZqpI/LvurFrA4wTjh+vdSU6 MB8JdEkaZu/uQ04pD/7KV4nXRGZ+GNozdzGv2NGPbfDyW4061/nMXo3S0BEaTY8k oYYXT7D9UDo2OgP27KAWG+jsuy1dIl2/gRU23bfgU6aUXq3oTH3p205udLl06NJA == Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 46qn68na0b-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 19 May 2025 18:07:18 +0000 (GMT) Received: from m0356517.ppops.net (m0356517.ppops.net [127.0.0.1]) by pps.reinject (8.18.0.8/8.18.0.8) with ESMTP id 54JHxlmK008758; Mon, 19 May 2025 18:07:17 GMT Received: from ppma22.wdc07v.mail.ibm.com (5c.69.3da9.ip4.static.sl-reverse.com [169.61.105.92]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 46qn68na09-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 19 May 2025 18:07:17 +0000 (GMT) Received: from pps.filterd (ppma22.wdc07v.mail.ibm.com [127.0.0.1]) by ppma22.wdc07v.mail.ibm.com (8.18.1.2/8.18.1.2) with ESMTP id 54JHBDZj030098; Mon, 19 May 2025 18:07:16 GMT Received: from smtprelay02.wdc07v.mail.ibm.com ([172.16.1.69]) by ppma22.wdc07v.mail.ibm.com (PPS) with ESMTPS id 46q55yr334-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 19 May 2025 18:07:16 +0000 Received: from smtpav06.dal12v.mail.ibm.com (smtpav06.dal12v.mail.ibm.com [10.241.53.105]) by smtprelay02.wdc07v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 54JI7F0T20841104 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 19 May 2025 18:07:15 GMT Received: from smtpav06.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1D25A58055; Mon, 19 May 2025 18:07:15 +0000 (GMT) Received: from smtpav06.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 45AF558043; Mon, 19 May 2025 18:07:14 +0000 (GMT) Received: from ltc.linux.ibm.com (unknown [9.5.196.140]) by smtpav06.dal12v.mail.ibm.com (Postfix) with ESMTP; Mon, 19 May 2025 18:07:14 +0000 (GMT) X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Date: Mon, 19 May 2025 23:37:13 +0530 From: Misbah Anjum N To: Sergey Senozhatsky Cc: Ritesh Harjani , yosry.ahmed@linux.dev, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org, maddy@linux.ibm.com, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, naveen@kernel.org, linux-kernel@vger.kernel.org Subject: Re: [BUG][powerpc] OOPs: Kernel access of bad area during zram swap write - kswapd0 crash In-Reply-To: <6r6hex7p53bsbaje4u7so7tfsz6jemazerzujzraibiah7eq4b@m5vgjaff2cdz> References: <89bfdedb74416156423d36d28c5b92e9@linux.ibm.com> <87ldrujhr5.fsf@gmail.com> <3374b7cf6a68364c389a260d7ec9067f@linux.ibm.com> <6r6hex7p53bsbaje4u7so7tfsz6jemazerzujzraibiah7eq4b@m5vgjaff2cdz> Message-ID: <29cec5ca090a1b833c6a68d103ef9e15@linux.ibm.com> X-Sender: misanjum@linux.ibm.com Organization: IBM Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: _fj80Oq0bAsyCG92_EMOzTZw27KKKfMK X-Proofpoint-GUID: 6tsfe39TkC4xcpBIw-_ajd4QhVuq24I7 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNTE5MDE2MyBTYWx0ZWRfX9Cs51r9TPd0d nksTwKvgORZ7YCfcoEDvqeI6EImOm0pshn79iq7bqdeYeb8MbHh23469hQT++X9YK3jB75eVX37 j1x4v03fK1hXutqI+YVVdouU0N2QIHHY5/R1ZVIK7XwPJ7eNrRmwK89A9EGXdK7tbUts254L+X5 zJazLoL6vVz6PZ//4dwV9VKy+a34AT5sLIq37mKwvjM3S9rJdlMGR0nAxXoyJ1q4lkJ3M1E+Bl4 rYC11ZaKNnGpP5IJA5xcTBrcbhyMuDVrYSMM13A5hMTX37xernd92PFKBu/2nducXp+3BdxkQdZ x7qnRlOhICzRKibqbMd3G3x8DRu8DwCHV8LyGFKH9jIlk2TcQ/MERV/+YmjDJZoMyigoX/afY0R uaZuxnwhW+G9C79vvp0QaioI3Cc5BbtlMqDhjDOEDJWp2DNUIIbPtqRd2lf9owIP7Br8yZMa X-Authority-Analysis: v=2.4 cv=CN4qXQrD c=1 sm=1 tr=0 ts=682b7356 cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=kj9zAlcOel0A:10 a=dt9VzEwgFbYA:10 a=NEAV23lmAAAA:8 a=VwQbUJbxAAAA:8 a=cm27Pg_UAAAA:8 a=JK2cp3ES9FE06y1yGSoA:9 a=CjuIK1q_8ugA:10 a=zZCYzV9kfG8A:10 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-05-19_07,2025-05-16_03,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 adultscore=0 suspectscore=0 mlxlogscore=999 priorityscore=1501 spamscore=0 mlxscore=0 lowpriorityscore=0 bulkscore=0 clxscore=1015 malwarescore=0 phishscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505070000 definitions=main-2505190163 On 2025-05-07 06:03, Sergey Senozhatsky wrote: > Hi, > > On (25/05/06 11:09), Misbah Anjum N wrote: >> I am facing this issue even with the latest kernel: >> 6.15.0-rc4-g5721cf0b9352 >> The suspecting commit is: 44f76413496ec343da0d8292ceecdcabe3e6ec16. >> The >> commit introduces zs_obj_write() function. >> Link: >> https://github.com/torvalds/linux/commit/44f76413496ec343da0d8292ceecdcabe3e6ec16 > > Can you try the following fix > https://lore.kernel.org/linux-mm/20250504110650.2783619-1-senozhatsky@chromium.org Hi, Thank you for the patch. I can confirm that it resolves the issue. After applying it, the kernel panic no longer occurs during memory reclaim with in my KVM guest testing environment. The Avocado-VT functional tests now complete successfully. Patch: Author: Sergey Senozhatsky Date: Sun May 4 20:00:22 2025 +0900 zsmalloc: don't underflow size calculation in zs_obj_write() Thank You, Misbah Anjum N