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Tue, 6 May 2025 05:39:01 GMT Received: from smtpav03.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 75F1558060; Tue, 6 May 2025 05:39:01 +0000 (GMT) Received: from smtpav03.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E0C325803F; Tue, 6 May 2025 05:39:00 +0000 (GMT) Received: from ltc.linux.ibm.com (unknown [9.5.196.140]) by smtpav03.dal12v.mail.ibm.com (Postfix) with ESMTP; Tue, 6 May 2025 05:39:00 +0000 (GMT) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Date: Tue, 06 May 2025 11:09:00 +0530 From: Misbah Anjum N To: Ritesh Harjani , senozhatsky@chromium.org, yosry.ahmed@linux.dev Cc: 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: <87ldrujhr5.fsf@gmail.com> References: <89bfdedb74416156423d36d28c5b92e9@linux.ibm.com> <87ldrujhr5.fsf@gmail.com> Message-ID: <3374b7cf6a68364c389a260d7ec9067f@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-Authority-Analysis: v=2.4 cv=X4ZSKHTe c=1 sm=1 tr=0 ts=6819a078 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=kj9zAlcOel0A:10 a=dt9VzEwgFbYA:10 a=NEAV23lmAAAA:8 a=xe_K4BuX0dQdScSaYpsA:9 a=CjuIK1q_8ugA:10 a=QQLMaIiM1wwA:10 X-Proofpoint-GUID: e--iastPlMmjXy9FL-UQycqA02G4JAZ1 X-Proofpoint-ORIG-GUID: 4Gwlx4U90MbmYYcnk0a4-ytVh4HX2e7a X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNTA2MDA1MSBTYWx0ZWRfXzj/UyGbhywwb RLwbZzJ2n/P7SjvOG20klsZCiGuA84n+tZGLeGRmdZz2h2+IxQqel7GtRkQp+Zv+nBWUyZlORPq tXXungA72HjLoIcNpvDDnZY2/NdDKyW6zHptjVuqCpm0Wx+iuU5sPrDmejCuUnwMNXKOPXMV+2j zU23p8Zj+bolJOw/YM+skyVNUGnCihMlMNOm4YXjoA0GRsg6idvQYkIdqHYC+DV6L7UZeQ0D3vS mQRbKddIctZm6uyGbdz6Jg+OLzK4NYUVKVX5CJ17hPIl2g1HbIz/5oV9sUcffM5xf8KnxNzBCuJ WRUwjdstbImlnOCUcka4Tx7vP9R/yqwowMusswyw3Xz5iyJLICvX23Ac4ab8rzWb6ThWSDdZh6u ZPQUVxPmnSosvw+pA5njXdawkSYdhZ7UoB4fDN7PMdRvfVfFvNt9LkZwmYFNUM49LJ2ndjpX 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=2025-05-06_03,2025-05-05_01,2025-02-21_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 adultscore=0 suspectscore=0 phishscore=0 impostorscore=0 mlxlogscore=999 mlxscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 malwarescore=0 priorityscore=1501 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2504070000 definitions=main-2505060051 Hi, 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 I was not able to reproduce the issue by reverting to the prior commit: e27af3f9360ee130b7ab0b274088f92146a0855b I would like to request assistance in debugging the issue. Thank you, Misbah Anjum N