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=-6.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SHORT_SHORTNER,SPF_HELO_NONE,SPF_PASS 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 3FC02C433E0 for ; Tue, 5 Jan 2021 13:02:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EED22229F0 for ; Tue, 5 Jan 2021 13:02:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730351AbhAENB7 (ORCPT ); Tue, 5 Jan 2021 08:01:59 -0500 Received: from mail-il1-f200.google.com ([209.85.166.200]:48576 "EHLO mail-il1-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725932AbhAENB6 (ORCPT ); Tue, 5 Jan 2021 08:01:58 -0500 Received: by mail-il1-f200.google.com with SMTP id f4so30520241ilu.15 for ; Tue, 05 Jan 2021 05:01:42 -0800 (PST) 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=/MLmxfO00kG8Vz2FD5GixYYD/MCQqiaRhG+GjRUx0dw=; b=NKeBUpjELtnpCe3XJeJKup/AwXsCTY7eQjiY/DVj8F5vmbvIvWByBsCgT0WGTNjMQb LugSziSKMWHm74ZbE8B9/CEeHSjabLuS91RFsAuCYLvz2GxaI8AN+W9tLGo6AwCstw3a PVQmndkRDbSyGghHseQN9YDPmJob7COR245wAedNVGeW4AyyW/8mvOSwSGmNIMj/QGqw m7p6oG10gO+uqIFkLbxVjsBL72DscFkbu8UA1UbePFYaoK7rGBNZ/6ZOQA3g07ixauuQ USmyb2c89QjNj3oBLvwsHPiT6EE8TV2ei2GBdnIf6B34obqRhxzHA/KV5usimCK4ZxT4 R3SA== X-Gm-Message-State: AOAM531O1E5diG1orULol7JXzqUY4NsSaW4I2isZW1t9W6BBpke11eK9 ltMYwkpe3SMgyAhj3E4ST0DOZcJk8t8bLrTwcjkEizgAq6oE X-Google-Smtp-Source: ABdhPJzpMzaz8sKKDn0AV8QoU1thqcOD4lAoiN7+cFrTHp8FA1YDc4R7RpHY4Ve/jJo2U4M6liMyQtKT9aa9OeRvcPrcqqGz2qHx MIME-Version: 1.0 X-Received: by 2002:a6b:920b:: with SMTP id u11mr62715438iod.191.1609851677004; Tue, 05 Jan 2021 05:01:17 -0800 (PST) Date: Tue, 05 Jan 2021 05:01:16 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000059589a05b826cdad@google.com> Subject: UBSAN: shift-out-of-bounds in diReadSpecial From: syzbot To: jfs-discussion@lists.sourceforge.net, linux-kernel@vger.kernel.org, shaggy@kernel.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: 614cb589 Merge tag 'acpi-5.11-rc1-2' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10e4ffbd500000 kernel config: https://syzkaller.appspot.com/x/.config?x=bf519e1e96191576 dashboard link: https://syzkaller.appspot.com/bug?extid=d0d8d1bfd19a85de7703 compiler: gcc (GCC) 10.1.0-syz 20200507 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+d0d8d1bfd19a85de7703@syzkaller.appspotmail.com ================================================================================ UBSAN: shift-out-of-bounds in fs/jfs/jfs_imap.c:445:7 shift exponent -19 is negative CPU: 0 PID: 11254 Comm: syz-executor.2 Not tainted 5.10.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 ubsan_epilogue+0xb/0x5a lib/ubsan.c:148 __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x181 lib/ubsan.c:395 diReadSpecial.cold+0x1b/0x3e fs/jfs/jfs_imap.c:445 jfs_mount+0x83/0x3d0 fs/jfs/jfs_mount.c:86 jfs_fill_super+0x5b1/0xbc0 fs/jfs/super.c:562 mount_bdev+0x34d/0x410 fs/super.c:1366 legacy_get_tree+0x105/0x220 fs/fs_context.c:592 vfs_get_tree+0x89/0x2f0 fs/super.c:1496 do_new_mount fs/namespace.c:2875 [inline] path_mount+0x13ad/0x20c0 fs/namespace.c:3205 do_mount fs/namespace.c:3218 [inline] __do_sys_mount fs/namespace.c:3426 [inline] __se_sys_mount fs/namespace.c:3403 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3403 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x460b9a Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ad 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 8a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007f2ed35f4a78 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f2ed35f4b10 RCX: 0000000000460b9a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f2ed35f4ad0 RBP: 00007f2ed35f4ad0 R08: 00007f2ed35f4b10 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000 R13: 0000000020000100 R14: 0000000020000200 R15: 000000002006d200 ================================================================================ --- 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.