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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 6C8A3C433FF for ; Mon, 12 Aug 2019 12:29:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 48E5B21744 for ; Mon, 12 Aug 2019 12:29:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728708AbfHLM3H (ORCPT ); Mon, 12 Aug 2019 08:29:07 -0400 Received: from mail-ot1-f72.google.com ([209.85.210.72]:46932 "EHLO mail-ot1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728684AbfHLM3H (ORCPT ); Mon, 12 Aug 2019 08:29:07 -0400 Received: by mail-ot1-f72.google.com with SMTP id g6so23257478otq.13 for ; Mon, 12 Aug 2019 05:29:06 -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=ql3ubiCn+pRPQjf/FUAg40+bKD1lNxcYuGAqg1CITsI=; b=KEDt65zjI/ZSXFbk/kIrIzUwU/qETHSaDGR3WIBeXwy2bo3J47vtPAZu1qjWp99GGz bdhcyM+80sNnyOYAvljTjbeDPHhz8WzXcB4zmgfSI5J0XMZR8rEozfj2y/Z8PcTLOS1U zezEvtKdJD7tIUH30OtMa4bKRNrHVd89X0Fzxqhdd7OqMoGgT+Cwk26+suA2rCkBUASI iRbriMVaDY6h0J40oLqrBf8z/tkc4F4heA9XURoLc+mb29DDiu5hMucnVZodycBiUskA mxWWzot0AB2lSV5zzwFNazi/yxOIIMKCO1yf+WdJnfJFkYGA0EGB+YSQ2Kq/DniqmKWK 6l9A== X-Gm-Message-State: APjAAAWQFaScToazExkeDN+xnH0KOwuUkGojlC5oJo9G1x8EH277YKwp Qxj2FUkbyF4DmRFFgW5XOqzDw1+BVXiUO1En+UxF0O9DhGar X-Google-Smtp-Source: APXvYqy3VB4XuS92/UQRve6Iudx01CRovEwo2GaP1oNhenec68xllXuFwZX8d1MOn15CcS5U2t37FjvkAIoXGO7Htgpw9zkQCuDE MIME-Version: 1.0 X-Received: by 2002:a5d:940b:: with SMTP id v11mr35149980ion.69.1565612946065; Mon, 12 Aug 2019 05:29:06 -0700 (PDT) Date: Mon, 12 Aug 2019 05:29:06 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000819227058feaabe9@google.com> Subject: divide error in read_super_block From: syzbot To: linux-kernel@vger.kernel.org, reiserfs-devel@vger.kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: d45331b0 Linux 5.3-rc4 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17f9879a600000 kernel config: https://syzkaller.appspot.com/x/.config?x=3d7eaed8496da4da dashboard link: https://syzkaller.appspot.com/bug?extid=faba5b2419543cc95f0d compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+faba5b2419543cc95f0d@syzkaller.appspotmail.com divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 21464 Comm: syz-executor.0 Not tainted 5.3.0-rc4 #73 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:read_super_block+0x57/0x7f0 fs/reiserfs/super.c:1611 Code: 89 d8 48 c1 e8 03 48 89 45 c0 42 80 3c 30 00 74 08 48 89 df e8 0a 29 c5 ff 48 89 5d c8 49 8b 5f 18 4c 89 65 b8 4c 89 e0 31 d2 <48> f7 f3 49 89 c6 4d 8d a7 28 01 00 00 4d 89 e5 49 c1 ed 03 48 b8 RSP: 0018:ffff88808e2dfa80 EFLAGS: 00010246 RAX: 0000000000002000 RBX: 0000000000000000 RCX: 0000000000040000 RDX: 0000000000000000 RSI: 0000000000003ab0 RDI: 0000000000003ab1 RBP: ffff88808e2dfad0 R08: ffffffff81e7119b R09: ffffed1011c5bf50 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000002000 R13: dffffc0000000000 R14: dffffc0000000000 R15: ffff88807a5a0a80 FS: 00007f55a9f77700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000758080 CR3: 00000000a4e4a000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: reiserfs_fill_super+0x7b0/0x30d0 fs/reiserfs/super.c:1966 mount_bdev+0x27c/0x390 fs/super.c:1283 get_super_block+0x34/0x40 fs/reiserfs/super.c:2599 legacy_get_tree+0xf9/0x1a0 fs/fs_context.c:661 vfs_get_tree+0x8f/0x380 fs/super.c:1413 do_new_mount fs/namespace.c:2791 [inline] do_mount+0x169d/0x2490 fs/namespace.c:3111 ksys_mount+0xcc/0x100 fs/namespace.c:3320 __do_sys_mount fs/namespace.c:3334 [inline] __se_sys_mount fs/namespace.c:3331 [inline] __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3331 do_syscall_64+0xfe/0x140 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459829 Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f55a9f76c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459829 RDX: 0000000020000080 RSI: 0000000020000100 RDI: 0000000020000040 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f55a9f776d4 R13: 00000000004c5e57 R14: 00000000004da858 R15: 00000000ffffffff Modules linked in: ---[ end trace b618cfac8e6036db ]--- RIP: 0010:read_super_block+0x57/0x7f0 fs/reiserfs/super.c:1611 Code: 89 d8 48 c1 e8 03 48 89 45 c0 42 80 3c 30 00 74 08 48 89 df e8 0a 29 c5 ff 48 89 5d c8 49 8b 5f 18 4c 89 65 b8 4c 89 e0 31 d2 <48> f7 f3 49 89 c6 4d 8d a7 28 01 00 00 4d 89 e5 49 c1 ed 03 48 b8 RSP: 0018:ffff88808e2dfa80 EFLAGS: 00010246 RAX: 0000000000002000 RBX: 0000000000000000 RCX: 0000000000040000 RDX: 0000000000000000 RSI: 0000000000003ab0 RDI: 0000000000003ab1 RBP: ffff88808e2dfad0 R08: ffffffff81e7119b R09: ffffed1011c5bf50 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000002000 R13: dffffc0000000000 R14: dffffc0000000000 R15: ffff88807a5a0a80 FS: 00007f55a9f77700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcdcc16f3c CR3: 00000000a4e4a000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.