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 X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3265AC7618F for ; Mon, 15 Jul 2019 16:51:12 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 53ABF206B8 for ; Mon, 15 Jul 2019 16:51:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 53ABF206B8 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=daenzer.net Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id C5AA36B0005; Mon, 15 Jul 2019 12:51:10 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id C0AE96B0006; Mon, 15 Jul 2019 12:51:10 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B22046B000A; Mon, 15 Jul 2019 12:51:10 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from mail-wm1-f72.google.com (mail-wm1-f72.google.com [209.85.128.72]) by kanga.kvack.org (Postfix) with ESMTP id 5DCAB6B0005 for ; Mon, 15 Jul 2019 12:51:10 -0400 (EDT) Received: by mail-wm1-f72.google.com with SMTP id n25so4615982wmc.7 for ; Mon, 15 Jul 2019 09:51:10 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-original-authentication-results:x-gm-message-state:to:from :subject:openpgp:autocrypt:cc:message-id:date:user-agent :mime-version:content-language; bh=u9Gn6X03EwS4korzQMJQqY5qNOzKMR5UNqyE1cZ8Y4Q=; b=d9/zt2YV1RU0f60KartMyAjdSg1XykE1uP2qJ7ldmPW96mcw5BPPODSl7WPE3gPDQ+ oQPrInkRb8jAhGKfS5wDHXAR2injRCdw0kcYaoL+11DtMyLYGW8Ml37svpI/OgfTpUUd uSqq3bXlDZnhpS+LiiTD1eIMkqbGPUf1c7KNO65dM3Njb6JtqvOva48LxwiEE+19Qn8V gemzFGWDdkpAspbXTMpxhXijT5/+seM5ywnZZJRmUYmW5xezIoT0cSFlMRTHgDIK9lye +5FY3g/r2MdCpSnDMyf+QLmgJ6ommRfuhfe0TX3wh2I8/lUpbLIPYHwt3Xlr4IN3f0ea ODeA== X-Original-Authentication-Results: mx.google.com; spf=neutral (google.com: 148.251.143.178 is neither permitted nor denied by best guess record for domain of michel@daenzer.net) smtp.mailfrom=michel@daenzer.net X-Gm-Message-State: APjAAAUIIrp2f0fYLgrgnK6xBUz9s4H9dH5QOVkHA9KhZtrvxuTU5WXQ jgDadvJodyhDt2DI2xqZO4vC5KWAwKV1LJnFW8HCTq59rP//cfIIlkM4hXaKpcA49WOijijYKYF MyhlZ+KJZU+Ndn4Z8MX0q1xWVXJWzPf+lbutWmFpvYhvBlcezkoszL9oqgs9jboA= X-Received: by 2002:adf:dc51:: with SMTP id m17mr4242996wrj.256.1563209469572; Mon, 15 Jul 2019 09:51:09 -0700 (PDT) X-Google-Smtp-Source: APXvYqz40UD3P7p0X1/nas4Uhhq3ra2EbEPTjYUkozkmBT7+//AGiMXnSpAVLXyJev3sU9wufN/X X-Received: by 2002:adf:dc51:: with SMTP id m17mr4242955wrj.256.1563209468838; Mon, 15 Jul 2019 09:51:08 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1563209468; cv=none; d=google.com; s=arc-20160816; b=eu0vY/hpkPXgUXpjvVKW75aTqpQCBsQ1abGzO2sSOChDR3/zwPrFDZZuFdU6UQqqRW 12DUbZHQHc1UNtSWmm/DzJRLKLHFQhk+8RPePtQDD6bDCbX8r7/YDOdqC0GWnviBBgu+ 3MrYxv4+qglRi/2cOquj8X3PeBkhU27SKLcE3tAknfp4YT8xbXurBelpYQb0dWPZ4wTo jPTW47qKZ4u/z9m48HyAgUSbTEZ1BOZ7kl2iLtrIefydUet6nLcdPzoRCDLiT8T6E7US WK3y/Wot/Yho6MTFQk6cTNsgR1RN8nW1zhA1I/hJpblU7pcwHGjFJ+PevzXkgqpG/mKK JR/Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-language:mime-version:user-agent:date:message-id:cc :autocrypt:openpgp:subject:from:to; bh=u9Gn6X03EwS4korzQMJQqY5qNOzKMR5UNqyE1cZ8Y4Q=; b=0uWnuExnTGOCEvbh+lF481xLVIyhGbE2NziOhL/WmRo2XvfZPG/2HK0pOrCkSHyMwg 1zNx/8Haez5T370hwrIsVb1uAgcEuz8HXb2NLa4ord7PnMDcwlt4EDJLl9k+s1qjt1EC zizqTafoJ3PCXmglZpffGJUpj63ywA9abNeYP4Hy78l6dlkRr1NWKgce6puytblQet3q Q4kOmwLtnEARi0wxDFiqOSQvRWYlkgYaQzR6QW07gV7Vdad/3RCKSqLfK5xztSMowf+0 uKeE7vW4z+3DozysMriw7mzAbw5XHMT1+JqNVOSYYOstGyFh737pxfprm2ptYqa31x8O kWQg== ARC-Authentication-Results: i=1; mx.google.com; spf=neutral (google.com: 148.251.143.178 is neither permitted nor denied by best guess record for domain of michel@daenzer.net) smtp.mailfrom=michel@daenzer.net Received: from netline-mail3.netline.ch (mail.netline.ch. [148.251.143.178]) by mx.google.com with ESMTP id r1si9117943wmr.197.2019.07.15.09.51.08 for ; Mon, 15 Jul 2019 09:51:08 -0700 (PDT) Received-SPF: neutral (google.com: 148.251.143.178 is neither permitted nor denied by best guess record for domain of michel@daenzer.net) client-ip=148.251.143.178; Authentication-Results: mx.google.com; spf=neutral (google.com: 148.251.143.178 is neither permitted nor denied by best guess record for domain of michel@daenzer.net) smtp.mailfrom=michel@daenzer.net Received: from localhost (localhost [127.0.0.1]) by netline-mail3.netline.ch (Postfix) with ESMTP id 694CF2B2015; Mon, 15 Jul 2019 18:51:08 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at netline-mail3.netline.ch Received: from netline-mail3.netline.ch ([127.0.0.1]) by localhost (netline-mail3.netline.ch [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 66CcZGmbPc_K; Mon, 15 Jul 2019 18:51:07 +0200 (CEST) Received: from thor (116.245.63.188.dynamic.wline.res.cust.swisscom.ch [188.63.245.116]) by netline-mail3.netline.ch (Postfix) with ESMTPSA id A2EB12AA0D0; Mon, 15 Jul 2019 18:51:07 +0200 (CEST) Received: from localhost ([::1]) by thor with esmtp (Exim 4.92) (envelope-from ) id 1hn4Bu-0003hk-E1; Mon, 15 Jul 2019 18:51:06 +0200 To: amd-gfx@lists.freedesktop.org From: =?UTF-8?Q?Michel_D=c3=a4nzer?= Subject: HMM related use-after-free with amdgpu Openpgp: preference=signencrypt Autocrypt: addr=michel@daenzer.net; prefer-encrypt=mutual; keydata= mQGiBDsehS8RBACbsIQEX31aYSIuEKxEnEX82ezMR8z3LG8ktv1KjyNErUX9Pt7AUC7W3W0b LUhu8Le8S2va6hi7GfSAifl0ih3k6Bv1Itzgnd+7ZmSrvCN8yGJaHNQfAevAuEboIb+MaVHo 9EMJj4ikOcRZCmQWw7evu/D9uQdtkCnRY9iJiAGxbwCguBHtpoGMxDOINCr5UU6qt+m4O+UD /355ohBBzzyh49lTj0kTFKr0Ozd20G2FbcqHgfFL1dc1MPyigej2gLga2osu2QY0ObvAGkOu WBi3LTY8Zs8uqFGDC4ZAwMPoFy3yzu3ne6T7d/68rJil0QcdQjzzHi6ekqHuhst4a+/+D23h Za8MJBEcdOhRhsaDVGAJSFEQB1qLBACOs0xN+XblejO35gsDSVVk8s+FUUw3TSWJBfZa3Imp V2U2tBO4qck+wqbHNfdnU/crrsHahjzBjvk8Up7VoY8oT+z03sal2vXEonS279xN2B92Tttr AgwosujguFO/7tvzymWC76rDEwue8TsADE11ErjwaBTs8ZXfnN/uAANgPLQjTWljaGVsIERh ZW56ZXIgPG1pY2hlbEBkYWVuemVyLm5ldD6IXgQTEQIAHgUCQFXxJgIbAwYLCQgHAwIDFQID AxYCAQIeAQIXgAAKCRBaga+OatuyAIrPAJ9ykonXI3oQcX83N2qzCEStLNW47gCeLWm/QiPY jqtGUnnSbyuTQfIySkK5AQ0EOx6FRRAEAJZkcvklPwJCgNiw37p0GShKmFGGqf/a3xZZEpjI qNxzshFRFneZze4f5LhzbX1/vIm5+ZXsEWympJfZzyCmYPw86QcFxyZflkAxHx9LeD+89Elx bw6wT0CcLvSv8ROfU1m8YhGbV6g2zWyLD0/naQGVb8e4FhVKGNY2EEbHgFBrAAMGA/0VktFO CxFBdzLQ17RCTwCJ3xpyP4qsLJH0yCoA26rH2zE2RzByhrTFTYZzbFEid3ddGiHOBEL+bO+2 GNtfiYKmbTkj1tMZJ8L6huKONaVrASFzLvZa2dlc2zja9ZSksKmge5BOTKWgbyepEc5qxSju YsYrX5xfLgTZC5abhhztpYhGBBgRAgAGBQI7HoVFAAoJEFqBr45q27IAlscAn2Ufk2d6/3p4 Cuyz/NX7KpL2dQ8WAJ9UD5JEakhfofed8PSqOM7jOO3LCA== Cc: =?UTF-8?B?SsOpcsO0bWUgR2xpc3Nl?= , linux-mm@kvack.org, Jason Gunthorpe Message-ID: <9a38f48b-3974-a238-5987-5251c1343f6b@daenzer.net> Date: Mon, 15 Jul 2019 18:51:06 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="------------D00F9BFE900E91BE33215F33" Content-Language: en-CA 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: This is a multi-part message in MIME format. --------------D00F9BFE900E91BE33215F33 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit With a KASAN enabled kernel built from amd-staging-drm-next, the attached use-after-free is pretty reliably detected during a piglit gpu run. Any ideas? P.S. With my standard kernels without KASAN (currently 5.2.y + drm-next changes for 5.3), I'm having trouble lately completing a piglit run, running into various issues which look like memory corruption, so might be related. -- Earthling Michel Dänzer | https://www.amd.com Libre software enthusiast | Mesa and X developer --------------D00F9BFE900E91BE33215F33 Content-Type: text/x-log; name="kern.log" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="kern.log" Jul 15 18:09:29 kaveri kernel: [ 560.388751][T12568] ================================================================== Jul 15 18:09:29 kaveri kernel: [ 560.389063][T12568] BUG: KASAN: use-after-free in __mmu_notifier_release+0x286/0x3e0 Jul 15 18:09:29 kaveri kernel: [ 560.389068][T12568] Read of size 8 at addr ffff88835e1c7cb0 by task amd_pinned_memo/12568 Jul 15 18:09:29 kaveri kernel: [ 560.389071][T12568] Jul 15 18:09:29 kaveri kernel: [ 560.389077][T12568] CPU: 9 PID: 12568 Comm: amd_pinned_memo Tainted: G OE 5.2.0-rc1-00811-g2ad5a7d31bdf #125 Jul 15 18:09:29 kaveri kernel: [ 560.389080][T12568] Hardware name: Micro-Star International Co., Ltd. MS-7A34/B350 TOMAHAWK (MS-7A34), BIOS 1.80 09/13/2017 Jul 15 18:09:29 kaveri kernel: [ 560.389084][T12568] Call Trace: Jul 15 18:09:29 kaveri kernel: [ 560.389091][T12568] dump_stack+0x7c/0xc0 Jul 15 18:09:29 kaveri kernel: [ 560.389097][T12568] ? __mmu_notifier_release+0x286/0x3e0 Jul 15 18:09:29 kaveri kernel: [ 560.389101][T12568] print_address_description+0x65/0x22e Jul 15 18:09:29 kaveri kernel: [ 560.389106][T12568] ? __mmu_notifier_release+0x286/0x3e0 Jul 15 18:09:29 kaveri kernel: [ 560.389110][T12568] ? __mmu_notifier_release+0x286/0x3e0 Jul 15 18:09:29 kaveri kernel: [ 560.389115][T12568] __kasan_report.cold.3+0x1a/0x3d Jul 15 18:09:29 kaveri kernel: [ 560.389122][T12568] ? __mmu_notifier_release+0x286/0x3e0 Jul 15 18:09:29 kaveri kernel: [ 560.389128][T12568] kasan_report+0xe/0x20 Jul 15 18:09:29 kaveri kernel: [ 560.389132][T12568] __mmu_notifier_release+0x286/0x3e0 Jul 15 18:09:29 kaveri kernel: [ 560.389142][T12568] exit_mmap+0x93/0x400 Jul 15 18:09:29 kaveri kernel: [ 560.389146][T12568] ? quarantine_put+0xb7/0x150 Jul 15 18:09:29 kaveri kernel: [ 560.389151][T12568] ? do_munmap+0x10/0x10 Jul 15 18:09:29 kaveri kernel: [ 560.389156][T12568] ? lockdep_hardirqs_on+0x37f/0x560 Jul 15 18:09:29 kaveri kernel: [ 560.389165][T12568] ? __khugepaged_exit+0x2af/0x3e0 Jul 15 18:09:29 kaveri kernel: [ 560.389169][T12568] ? __khugepaged_exit+0x2af/0x3e0 Jul 15 18:09:29 kaveri kernel: [ 560.389174][T12568] ? rcu_read_lock_sched_held+0xd8/0x110 Jul 15 18:09:29 kaveri kernel: [ 560.389179][T12568] ? kmem_cache_free+0x279/0x2c0 Jul 15 18:09:29 kaveri kernel: [ 560.389185][T12568] ? __khugepaged_exit+0x2be/0x3e0 Jul 15 18:09:29 kaveri kernel: [ 560.389192][T12568] mmput+0xb2/0x390 Jul 15 18:09:29 kaveri kernel: [ 560.389199][T12568] do_exit+0x880/0x2a70 Jul 15 18:09:29 kaveri kernel: [ 560.389207][T12568] ? find_held_lock+0x33/0x1c0 Jul 15 18:09:29 kaveri kernel: [ 560.389213][T12568] ? mm_update_next_owner+0x5d0/0x5d0 Jul 15 18:09:29 kaveri kernel: [ 560.389218][T12568] ? __do_page_fault+0x41d/0xa20 Jul 15 18:09:29 kaveri kernel: [ 560.389226][T12568] ? lock_downgrade+0x620/0x620 Jul 15 18:09:29 kaveri kernel: [ 560.389232][T12568] ? handle_mm_fault+0x4ab/0x6a0 Jul 15 18:09:29 kaveri kernel: [ 560.389242][T12568] do_group_exit+0xf0/0x2e0 Jul 15 18:09:29 kaveri kernel: [ 560.389249][T12568] __x64_sys_exit_group+0x3a/0x50 Jul 15 18:09:29 kaveri kernel: [ 560.389255][T12568] do_syscall_64+0x9c/0x430 Jul 15 18:09:29 kaveri kernel: [ 560.389261][T12568] entry_SYSCALL_64_after_hwframe+0x49/0xbe Jul 15 18:09:29 kaveri kernel: [ 560.389266][T12568] RIP: 0033:0x7fc23d8ed9d6 Jul 15 18:09:29 kaveri kernel: [ 560.389271][T12568] Code: 00 4c 8b 0d bc 44 0f 00 eb 19 66 2e 0f 1f 84 00 00 00 00 00 89 d7 89 f0 0f 05 48 3d 00 f0 ff ff 77 22 f4 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff ff 76 e2 f7 d8 64 41 89 01 eb da 66 2e 0f 1f 84 00 Jul 15 18:09:29 kaveri kernel: [ 560.389275][T12568] RSP: 002b:00007fff8c3bcfa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 Jul 15 18:09:29 kaveri kernel: [ 560.389280][T12568] RAX: ffffffffffffffda RBX: 00007fc23d9de760 RCX: 00007fc23d8ed9d6 Jul 15 18:09:29 kaveri kernel: [ 560.389283][T12568] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 Jul 15 18:09:29 kaveri kernel: [ 560.389287][T12568] RBP: 0000000000000000 R08: 00000000000000e7 R09: ffffffffffffff48 Jul 15 18:09:29 kaveri kernel: [ 560.389290][T12568] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc23d9de760 Jul 15 18:09:29 kaveri kernel: [ 560.389293][T12568] R13: 00000000000004f0 R14: 00007fc23d9e7428 R15: 0000000000000000 Jul 15 18:09:29 kaveri kernel: [ 560.389306][T12568] Jul 15 18:09:29 kaveri kernel: [ 560.389309][T12568] Allocated by task 12568: Jul 15 18:09:29 kaveri kernel: [ 560.389314][T12568] save_stack+0x19/0x80 Jul 15 18:09:29 kaveri kernel: [ 560.389318][T12568] __kasan_kmalloc.constprop.8+0xc1/0xd0 Jul 15 18:09:29 kaveri kernel: [ 560.389323][T12568] hmm_get_or_create+0x8f/0x3f0 Jul 15 18:09:29 kaveri kernel: [ 560.389327][T12568] hmm_mirror_register+0x58/0x240 Jul 15 18:09:29 kaveri kernel: [ 560.389425][T12568] amdgpu_mn_get+0x37b/0x6c0 [amdgpu] Jul 15 18:09:29 kaveri kernel: [ 560.389554][T12568] amdgpu_mn_register+0xf6/0x710 [amdgpu] Jul 15 18:09:29 kaveri kernel: [ 560.389656][T12568] amdgpu_gem_userptr_ioctl+0x6a3/0x8b0 [amdgpu] Jul 15 18:09:29 kaveri kernel: [ 560.389678][T12568] drm_ioctl_kernel+0x1c9/0x260 [drm] Jul 15 18:09:29 kaveri kernel: [ 560.389701][T12568] drm_ioctl+0x436/0x930 [drm] Jul 15 18:09:29 kaveri kernel: [ 560.389830][T12568] amdgpu_drm_ioctl+0xd0/0x1b0 [amdgpu] Jul 15 18:09:29 kaveri kernel: [ 560.389836][T12568] do_vfs_ioctl+0x193/0xfd0 Jul 15 18:09:29 kaveri kernel: [ 560.389839][T12568] ksys_ioctl+0x60/0x90 Jul 15 18:09:29 kaveri kernel: [ 560.389843][T12568] __x64_sys_ioctl+0x6f/0xb0 Jul 15 18:09:29 kaveri kernel: [ 560.389847][T12568] do_syscall_64+0x9c/0x430 Jul 15 18:09:29 kaveri kernel: [ 560.389851][T12568] entry_SYSCALL_64_after_hwframe+0x49/0xbe Jul 15 18:09:29 kaveri kernel: [ 560.389853][T12568] Jul 15 18:09:29 kaveri kernel: [ 560.389857][T12568] Freed by task 12568: Jul 15 18:09:29 kaveri kernel: [ 560.389860][T12568] save_stack+0x19/0x80 Jul 15 18:09:29 kaveri kernel: [ 560.389864][T12568] __kasan_slab_free+0x125/0x170 Jul 15 18:09:29 kaveri kernel: [ 560.389867][T12568] kfree+0xe2/0x290 Jul 15 18:09:29 kaveri kernel: [ 560.389871][T12568] __mmu_notifier_release+0xef/0x3e0 Jul 15 18:09:29 kaveri kernel: [ 560.389875][T12568] exit_mmap+0x93/0x400 Jul 15 18:09:29 kaveri kernel: [ 560.389879][T12568] mmput+0xb2/0x390 Jul 15 18:09:29 kaveri kernel: [ 560.389883][T12568] do_exit+0x880/0x2a70 Jul 15 18:09:29 kaveri kernel: [ 560.389886][T12568] do_group_exit+0xf0/0x2e0 Jul 15 18:09:29 kaveri kernel: [ 560.389890][T12568] __x64_sys_exit_group+0x3a/0x50 Jul 15 18:09:29 kaveri kernel: [ 560.389893][T12568] do_syscall_64+0x9c/0x430 Jul 15 18:09:29 kaveri kernel: [ 560.389897][T12568] entry_SYSCALL_64_after_hwframe+0x49/0xbe Jul 15 18:09:29 kaveri kernel: [ 560.389900][T12568] Jul 15 18:09:29 kaveri kernel: [ 560.389903][T12568] The buggy address belongs to the object at ffff88835e1c7c00 Jul 15 18:09:29 kaveri kernel: [ 560.389903][T12568] which belongs to the cache kmalloc-512 of size 512 Jul 15 18:09:29 kaveri kernel: [ 560.389908][T12568] The buggy address is located 176 bytes inside of Jul 15 18:09:29 kaveri kernel: [ 560.389908][T12568] 512-byte region [ffff88835e1c7c00, ffff88835e1c7e00) Jul 15 18:09:29 kaveri kernel: [ 560.389911][T12568] The buggy address belongs to the page: Jul 15 18:09:29 kaveri kernel: [ 560.389915][T12568] page:ffffea000d787100 refcount:1 mapcount:0 mapping:ffff88837d80ec00 index:0x0 compound_mapcount: 0 Jul 15 18:09:29 kaveri kernel: [ 560.389921][T12568] flags: 0x17fffc000010200(slab|head) Jul 15 18:09:29 kaveri kernel: [ 560.389929][T12568] raw: 017fffc000010200 0000000000000000 0000000100000001 ffff88837d80ec00 Jul 15 18:09:29 kaveri kernel: [ 560.389933][T12568] raw: 0000000000000000 0000000000190019 00000001ffffffff 0000000000000000 Jul 15 18:09:29 kaveri kernel: [ 560.389936][T12568] page dumped because: kasan: bad access detected Jul 15 18:09:29 kaveri kernel: [ 560.389939][T12568] Jul 15 18:09:29 kaveri kernel: [ 560.389942][T12568] Memory state around the buggy address: Jul 15 18:09:29 kaveri kernel: [ 560.389946][T12568] ffff88835e1c7b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc Jul 15 18:09:29 kaveri kernel: [ 560.389949][T12568] ffff88835e1c7c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb Jul 15 18:09:29 kaveri kernel: [ 560.389953][T12568] >ffff88835e1c7c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb Jul 15 18:09:29 kaveri kernel: [ 560.389956][T12568] ^ Jul 15 18:09:29 kaveri kernel: [ 560.389960][T12568] ffff88835e1c7d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb Jul 15 18:09:29 kaveri kernel: [ 560.389963][T12568] ffff88835e1c7d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb Jul 15 18:09:29 kaveri kernel: [ 560.389966][T12568] ================================================================== --------------D00F9BFE900E91BE33215F33--