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,URIBL_BLOCKED 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 1B1D3C4338F for ; Fri, 20 Aug 2021 16:48:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 04A8760E9B for ; Fri, 20 Aug 2021 16:48:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232167AbhHTQs7 (ORCPT ); Fri, 20 Aug 2021 12:48:59 -0400 Received: from mail-il1-f199.google.com ([209.85.166.199]:42923 "EHLO mail-il1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231256AbhHTQsz (ORCPT ); Fri, 20 Aug 2021 12:48:55 -0400 Received: by mail-il1-f199.google.com with SMTP id z14-20020a92d18e0000b029022418b34bc9so5736162ilz.9 for ; Fri, 20 Aug 2021 09:48:18 -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=53tNogvSRqGJfOiOdqD6lM2tBtj1RvkYDkpUz8ReIzw=; b=PPoXEGq7VOyhSFRFOT+sul1RWHiBiiXilPlNK5knPbyMTB3FtD8VJxnMwt0aUaRC0S g91jhBEPK1Qk1OfqhhaLPUJY+bSnUkHt0TlAwCfzzLEWDhpSo6+40lnXbqAGhEnAkxhU 0Hbo+hWX0oal9KUPvP6wJyfTGxuCTK4pL1SsyyvU7+bdes2r8COXChods7ruRMFB5Tbg t380WQeMvE1l6ysRoSSkFb3jjH9y0y58qwqmTzvR7we4tSVivumpPcb/JdMXCwRg4Brs CRDr70hIYXDN5qi20d6egbLUOjYAZbhy/6K+oJH1Ne5d/hTcd95l4/J95EwYmyH+Mnwt A8SA== X-Gm-Message-State: AOAM532rsN/LC1NqkSle+YbbWjJijPTQywOHWsoHeZ+EdBwUatYU/mKd Kn8pihUJR5XPfILu6h1bbEIlKFx6+LcP3ZTlh9VBm/s0WBWh X-Google-Smtp-Source: ABdhPJx9bjWJRdADnmgbnpo0NKVWqI0fN6krvG3kTXRH5vNZYMYWMFd3vxa+EcrAxRMYx4n5EyA8/YNqkwvgxSm75kpQOoO0zN8b MIME-Version: 1.0 X-Received: by 2002:a5d:8941:: with SMTP id b1mr16721739iot.45.1629478097800; Fri, 20 Aug 2021 09:48:17 -0700 (PDT) Date: Fri, 20 Aug 2021 09:48:17 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000030563005ca006ffd@google.com> Subject: [syzbot] WARNING in split_huge_page_to_list 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" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: f87d64319e6f Merge tag 'net-5.14-rc7' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1205bd55300000 kernel config: https://syzkaller.appspot.com/x/.config?x=3205625db2f96ac9 dashboard link: https://syzkaller.appspot.com/bug?extid=0c65e03871b364e714a3 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1 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+0c65e03871b364e714a3@syzkaller.appspotmail.com __do_munmap+0x627/0x11c0 mm/mmap.c:2911 do_munmap mm/mmap.c:2922 [inline] munmap_vma_range mm/mmap.c:604 [inline] mmap_region+0x85a/0x1760 mm/mmap.c:1753 do_mmap+0x86e/0x1180 mm/mmap.c:1584 vm_mmap_pgoff+0x1b7/0x290 mm/util.c:519 ksys_mmap_pgoff+0x4a8/0x620 mm/mmap.c:1635 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae ------------[ cut here ]------------ WARNING: CPU: 0 PID: 2144 at mm/huge_memory.c:2327 unmap_page mm/huge_memory.c:2327 [inline] WARNING: CPU: 0 PID: 2144 at mm/huge_memory.c:2327 split_huge_page_to_list+0x25eb/0x3e60 mm/huge_memory.c:2700 Modules linked in: CPU: 0 PID: 2144 Comm: kswapd1 Not tainted 5.14.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:unmap_page mm/huge_memory.c:2327 [inline] RIP: 0010:split_huge_page_to_list+0x25eb/0x3e60 mm/huge_memory.c:2700 Code: 89 de e8 28 e1 b6 ff 84 db 0f 85 54 e0 ff ff e8 6b d9 b6 ff 48 c7 c6 e0 d8 97 89 48 89 ef e8 9c 72 e9 ff c6 05 05 dd 99 0b 01 <0f> 0b e9 32 e0 ff ff bb 02 00 00 00 e9 64 ef ff ff e8 3f d9 b6 ff RSP: 0018:ffffc900084f76d8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88801c44c000 RSI: ffffffff81be0514 RDI: 0000000000000003 RBP: ffffea00021c0000 R08: 0000000000000029 R09: 00000000ffffffff R10: ffffffff88ea7679 R11: 00000000ffffffff R12: ffff88814018d2d8 R13: ffffea00021c0008 R14: ffffea00021c0000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f14895d5000 CR3: 0000000017350000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: split_huge_page include/linux/huge_mm.h:192 [inline] deferred_split_scan+0x5fa/0xbd0 mm/huge_memory.c:2860 do_shrink_slab+0x42d/0xbd0 mm/vmscan.c:709 shrink_slab+0x17c/0x6e0 mm/vmscan.c:869 shrink_node_memcgs mm/vmscan.c:2868 [inline] shrink_node+0x8d1/0x1df0 mm/vmscan.c:2983 kswapd_shrink_node mm/vmscan.c:3726 [inline] balance_pgdat+0x7ce/0x13b0 mm/vmscan.c:3917 kswapd+0x5b6/0xdb0 mm/vmscan.c:4176 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 --- 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.