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=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 001F0C433EF for ; Mon, 6 Sep 2021 01:05:42 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 73B7061004 for ; Mon, 6 Sep 2021 01:05:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 73B7061004 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 856B26B0071; Sun, 5 Sep 2021 21:05:41 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 807156B0072; Sun, 5 Sep 2021 21:05:41 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6F4B16B0073; Sun, 5 Sep 2021 21:05:41 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0172.hostedemail.com [216.40.44.172]) by kanga.kvack.org (Postfix) with ESMTP id 6007A6B0071 for ; Sun, 5 Sep 2021 21:05:41 -0400 (EDT) Received: from smtpin03.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id E59A7230EA for ; Mon, 6 Sep 2021 01:05:40 +0000 (UTC) X-FDA: 78555356040.03.BA6AB23 Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) by imf15.hostedemail.com (Postfix) with ESMTP id 9EA88D000096 for ; Mon, 6 Sep 2021 01:05:40 +0000 (UTC) Received: by mail-io1-f70.google.com with SMTP id f1-20020a5edf01000000b005b85593f933so4067595ioq.14 for ; Sun, 05 Sep 2021 18:05:40 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=+rZ8z9tqSM6UQv/Jg7EoW4+EH9LkcJd9v/lEDs76fmo=; b=izDmRb44hNArCbvLk80y+64KgU+im05avCo5BuJpZ2Zw7LqURIT/oXYjAMnuJA3rt0 hKCWeDrRxUKPcqFqTeNbEqucMZZzYsUCbHEkDsJPIFOLxK88Ar4MlK536NqZHGLvwtqR L1oz4/2IJQ3iuQhsLP2tQZcEgdBcsgOaZJZO0P4mFYXW+XEFatJ8Q0tSf0eF6/GhzqHt l3XfxtKRvIzkXUO3oYUUL93TP+kjoFZSIb9PzLlovGVJpbNLC3iir3DjiKgby/g1BoAU v9ARYtx679e+K49zbNWq34CKETmI9MFpc+pcg8MwnptdvKSDQ8zHZSWnlDE+ay491DKd vljQ== X-Gm-Message-State: AOAM532MkQD1fOS/VK26k/nUNktAtQsTdebvVTHnjpu8TTzdg9B0gt/l mNAVBj+oHacytS+F1PkF8mp9BRe6txgXcAFNBTWt31xFow5J X-Google-Smtp-Source: ABdhPJyeGPZ+qvqjWrHDvPV/Q4XCGVoEHJbbR8mHPwan4DNd3wae9rmhn+MQ+9dBR6HrlPuZHF/+gxSZaPch1beeThu4WT+/1waY MIME-Version: 1.0 X-Received: by 2002:a02:ab98:: with SMTP id t24mr8425758jan.115.1630890340082; Sun, 05 Sep 2021 18:05:40 -0700 (PDT) Date: Sun, 05 Sep 2021 18:05:40 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000063692b05cb493f6d@google.com> Subject: [syzbot] BUG: soft lockup in handle_mm_fault (2) From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Authentication-Results: imf15.hostedemail.com; dkim=none; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none); spf=pass (imf15.hostedemail.com: domain of 3ZGk1YQkbAB0LRSD3EE7K3IIB6.9HH9E7NL7K5HGM7GM.5HF@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com designates 209.85.166.70 as permitted sender) smtp.mailfrom=3ZGk1YQkbAB0LRSD3EE7K3IIB6.9HH9E7NL7K5HGM7GM.5HF@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 9EA88D000096 X-Stat-Signature: z9qyrdgaphk1ooephxch1dcru9aiktzu X-HE-Tag: 1630890340-391392 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: Hello, syzbot found the following issue on: HEAD commit: 49624efa65ac Merge tag 'denywrite-for-5.15' of git://githu.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12eff4b3300000 kernel config: https://syzkaller.appspot.com/x/.config?x=c598149362d97396 dashboard link: https://syzkaller.appspot.com/bug?extid=aa7a876b8108f1622bc3 compiler: aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1 userspace arch: arm64 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+aa7a876b8108f1622bc3@syzkaller.appspotmail.com watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.1:26449] Modules linked in: irq event stamp: 248 hardirqs last enabled at (247): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline] hardirqs last enabled at (247): [] exit_to_kernel_mode+0x38/0x230 arch/arm64/kernel/entry-common.c:91 hardirqs last disabled at (248): [] enter_el1_irq_or_nmi+0x10/0x20 arch/arm64/kernel/entry-common.c:227 softirqs last enabled at (182): [] _stext+0x964/0xff8 softirqs last disabled at (41): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (41): [] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (41): [] __irq_exit_rcu+0x208/0x4f0 kernel/softirq.c:636 CPU: 0 PID: 26449 Comm: syz-executor.1 Not tainted 5.14.0-syzkaller-09416-g49624efa65ac #0 Hardware name: linux,dummy-virt (DT) pstate: 00000005 (nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : clear_page+0x14/0x28 arch/arm64/lib/clear_page.S:23 lr : clear_highpage include/linux/highmem.h:181 [inline] lr : kernel_init_free_pages.part.0+0x6c/0x17c mm/page_alloc.c:1286 sp : ffff800019be75e0 x29: ffff800019be75e0 x28: 0000000000000000 x27: 0000000000000000 x26: ffff000009d64940 x25: ffff6000013ac928 x24: 00000000000014c0 x23: ffff000009d63480 x22: fffffc0000173340 x21: ffff800015794a78 x20: dfff800000000000 x19: fffffc0000173300 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 x14: 1ffff0000337ce86 x13: 0000000000000013 x12: ffff7f800002e667 x11: 1fffff800002e666 x10: ffff7f800002e666 x9 : 0000000000000000 x8 : ffff600000b99a00 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 1ffff00003060d98 x3 : 1fffe000013ac691 x2 : 0000000000000004 x1 : 0000000000000040 x0 : ffff000005ccc880 Call trace: clear_page+0x14/0x28 arch/arm64/lib/clear_page.S:21 kernel_init_free_pages mm/page_alloc.c:1283 [inline] post_alloc_hook+0x1ac/0x25c mm/page_alloc.c:2426 prep_new_page mm/page_alloc.c:2436 [inline] get_page_from_freelist+0x184c/0x2320 mm/page_alloc.c:4168 __alloc_pages+0x1a8/0x21d0 mm/page_alloc.c:5390 alloc_pages_vma+0xbc/0x530 mm/mempolicy.c:2252 alloc_zeroed_user_highpage_movable+0x9c/0xd0 arch/arm64/mm/fault.c:926 do_anonymous_page mm/memory.c:3767 [inline] handle_pte_fault mm/memory.c:4556 [inline] __handle_mm_fault+0xbc4/0x2210 mm/memory.c:4693 handle_mm_fault+0x1dc/0x4f0 mm/memory.c:4791 __do_page_fault arch/arm64/mm/fault.c:499 [inline] do_page_fault+0x230/0x8c0 arch/arm64/mm/fault.c:599 do_translation_fault+0x1a4/0x210 arch/arm64/mm/fault.c:680 do_mem_abort+0x64/0x1c0 arch/arm64/mm/fault.c:813 el0_da+0x7c/0x2b0 arch/arm64/kernel/entry-common.c:481 el0t_64_sync_handler+0x168/0x1b0 arch/arm64/kernel/entry-common.c:616 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:572 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.