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 8252CC433FE for ; Wed, 26 Oct 2022 09:54:19 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 18F9D8E0002; Wed, 26 Oct 2022 05:54:19 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 140488E0001; Wed, 26 Oct 2022 05:54:19 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id EFC618E0002; Wed, 26 Oct 2022 05:54:18 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id DDB028E0001 for ; Wed, 26 Oct 2022 05:54:18 -0400 (EDT) Received: from smtpin09.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id B2D8040EED for ; Wed, 26 Oct 2022 09:54:18 +0000 (UTC) X-FDA: 80062640196.09.1BEF266 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by imf10.hostedemail.com (Postfix) with ESMTP id 5024CC0037 for ; Wed, 26 Oct 2022 09:54:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1666778056; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=x/uJi88rLYn+Jby6NBl7m6FkQ3GGLfjzxETi8/CrQyY=; b=cMNpk955tuMu19M+m9OxGTeyoFhAadM0V5kC1QPshVEt/WQO8Khiww0mgAJohggf6AXppf ws0NHk6eESWwfk95rvSaGuOO5BOiGvL2eEkakvJdTeYSilJeCcNAFYqwTw2/h8xodSIr+v TYoISmIBTesi4KxCxVWHSUo59qpe55Q= Received: from mail-wm1-f70.google.com (mail-wm1-f70.google.com [209.85.128.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_128_GCM_SHA256) id us-mta-1-NVL-dHsMPCagHBN2dvq7ug-1; Wed, 26 Oct 2022 05:54:15 -0400 X-MC-Unique: NVL-dHsMPCagHBN2dvq7ug-1 Received: by mail-wm1-f70.google.com with SMTP id v191-20020a1cacc8000000b003bdf7b78dccso5945765wme.3 for ; Wed, 26 Oct 2022 02:54:15 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:in-reply-to:organization:from:references :to:content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=x/uJi88rLYn+Jby6NBl7m6FkQ3GGLfjzxETi8/CrQyY=; b=Ybdpqtza9zRO3YUQxkvIExuBQu9YmclWMl3HGdcsBqtsnskPmtb4wdAJPaL7F9qP2o eQa53b4DACr0rxVlUTlUnadjcSGeplGflx4mJ2tN+8qvVoxd/rKUbvIWuRN96D23qzFX lZYNb6jmAro8zv6Sr0v7Fv8Q1I6ohmcOSRQDzt9W8zlnQ3u8095g3/Cc1WpQ50il0+cz 6YuFZP3swgptGTrzPe3CEGp70gAS3ZTzYHC/gLOH0OSxArlYaRAzwQNiBVg7upkC5Yer 2sVAobjvbQ/P4N9DsTfTqM+tZhsLOxguKHAe4GiVKEykjFoVFdUl9esf79qMBHBAZ1H7 VCTA== X-Gm-Message-State: ACrzQf2KV/6T1s/DNEURW3xU8RiL7QqLq5BKl9r3HVecqyQJsUJqBLkx aQN/Nx9GlQ/W6LGc04Jur5vaZGHJpbDpFSSs0UzCcBfRpb4Hl+ubEjwmSthlkM8ix/pmrUyZzAr xu0JOGI+ceZw= X-Received: by 2002:a1c:19c4:0:b0:3b4:a1da:76c3 with SMTP id 187-20020a1c19c4000000b003b4a1da76c3mr1802568wmz.106.1666778054386; Wed, 26 Oct 2022 02:54:14 -0700 (PDT) X-Google-Smtp-Source: AMsMyM5gnhIJI5fMpEcs4UaESIX7W2jHroFsl4g/+KuAGD6//954emnet0+lEIUinuRjtWcePbZqZA== X-Received: by 2002:a1c:19c4:0:b0:3b4:a1da:76c3 with SMTP id 187-20020a1c19c4000000b003b4a1da76c3mr1802543wmz.106.1666778054094; Wed, 26 Oct 2022 02:54:14 -0700 (PDT) Received: from ?IPV6:2003:cb:c706:5b00:c9f4:7535:9360:70d7? (p200300cbc7065b00c9f47535936070d7.dip0.t-ipconnect.de. [2003:cb:c706:5b00:c9f4:7535:9360:70d7]) by smtp.gmail.com with ESMTPSA id bx6-20020a5d5b06000000b00228d52b935asm5095909wrb.71.2022.10.26.02.54.13 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 26 Oct 2022 02:54:13 -0700 (PDT) Message-ID: <9a450a11-531d-8e1a-4c77-70102aa7f424@redhat.com> Date: Wed, 26 Oct 2022 11:54:12 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.3.1 Subject: Re: [syzbot] WARNING in __split_huge_page_tail To: syzbot , akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com References: <000000000000aa2b2805ebea9137@google.com> From: David Hildenbrand Organization: Red Hat In-Reply-To: <000000000000aa2b2805ebea9137@google.com> X-Mimecast-Spam-Score: 1 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1666778057; a=rsa-sha256; cv=none; b=JSv1PJ55J0eiaVdIdIjutRbNgLLlzmNy0hnZRIha5SMJPZsO9vskC/IyCztv8MzfN2VJ7t 8/zV4mOWdmjT0+P+rPyqZVcZhwlXYQRXgRniBaC2fgA4yg85lx0GLZC8AEWmzVJDG/gktI dOuGu1M+0lWI1yApWSOh0/VaInWJ4hw= ARC-Authentication-Results: i=1; imf10.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=cMNpk955; spf=pass (imf10.hostedemail.com: domain of david@redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=david@redhat.com; dmarc=pass (policy=none) header.from=redhat.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1666778057; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to: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=x/uJi88rLYn+Jby6NBl7m6FkQ3GGLfjzxETi8/CrQyY=; b=xI7ZI+uYPoEHBooEq4Kg2kxJkMxN2XD1FyDyMCZ4K78q9T2l8y2s5PsDSCR3kZVUxHlOPD O4un+zv9puCdNc9iplyuKnghnphcyVV0vRz4fgsuRTqVcnAMRbMfHu0M/nF8wh8L99PX6p Obf9S56R6/BxwOMrjF5Hh+2RcpaoJgk= X-Stat-Signature: zr7hqzyw9huc3ko79xkzt3xtmnikdeme X-Rspamd-Queue-Id: 5024CC0037 Authentication-Results: imf10.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=cMNpk955; spf=pass (imf10.hostedemail.com: domain of david@redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=david@redhat.com; dmarc=pass (policy=none) header.from=redhat.com X-Rspam-User: X-Rspamd-Server: rspam05 X-HE-Tag: 1666778057-675615 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: On 26.10.22 08:59, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 4da34b7d175d Merge tag 'thermal-6.1-rc2' of git://git.kern.. > git tree: upstream > console+strace: https://syzkaller.appspot.com/x/log.txt?x=113bd8bc880000 > kernel config: https://syzkaller.appspot.com/x/.config?x=4789759e8a6d5f57 > dashboard link: https://syzkaller.appspot.com/bug?extid=273b547b15eb58ea35e8 > compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=161e1f62880000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16dd4fe6880000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/a61ddb36c296/disk-4da34b7d.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/ceee41246252/vmlinux-4da34b7d.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+273b547b15eb58ea35e8@syzkaller.appspotmail.com > > tlb_finish_mmu+0xcb/0x200 mm/mmu_gather.c:363 > exit_mmap+0x2b1/0x670 mm/mmap.c:3098 > __mmput+0x114/0x3b0 kernel/fork.c:1185 > exit_mm+0x217/0x2f0 kernel/exit.c:516 > do_exit+0x5e7/0x2070 kernel/exit.c:807 > do_group_exit+0x1fd/0x2b0 kernel/exit.c:950 > __do_sys_exit_group kernel/exit.c:961 [inline] > __se_sys_exit_group kernel/exit.c:959 [inline] > __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:959 > do_syscall_x64 arch/x86/entry/common.c:50 [inline] > do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 > entry_SYSCALL_64_after_hwframe+0x63/0xcd > ------------[ cut here ]------------ > WARNING: CPU: 0 PID: 3908 at mm/huge_memory.c:2465 __split_huge_page_tail+0x81c/0x1080 mm/huge_memory.c:2465 Is this the VM_BUG_ON_PAGE(atomic_read(&page_tail->_mapcount) != -1, page_tail); assertion? -- Thanks, David / dhildenb