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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) 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; 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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