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=ham 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 174CBC48BDF for ; Thu, 24 Jun 2021 05:17:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ECCD2613C1 for ; Thu, 24 Jun 2021 05:17:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230130AbhFXFTg (ORCPT ); Thu, 24 Jun 2021 01:19:36 -0400 Received: from mail-il1-f198.google.com ([209.85.166.198]:33311 "EHLO mail-il1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229853AbhFXFTe (ORCPT ); Thu, 24 Jun 2021 01:19:34 -0400 Received: by mail-il1-f198.google.com with SMTP id r8-20020a92cd880000b02901ee2da1ca6eso3376407ilb.0 for ; Wed, 23 Jun 2021 22:17:16 -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=a81u++oh9Pymi9za1s3ypkv0h8XEnKJ5RZuU4f/BFec=; b=TGF3BTjYTRUjBUzAsGdIRrPkiq/ZVyENAtd5gm3gIg9uvc4AQfyLyu7Xzbg6zmMZYr zBsyOJEOlpxIpgcYMif/oK7jcfH9BcRVYzLOKUSuoOOS8YigZiZ2KhJsG1MbBQDlzSdI OzL8q+vtSDdY0zyV0jyGSjC+LaYEHlt7B2IwNenuuogHnSE9Eoe1dGFwUiIHYf4+/WUU vtnvCyrnuUjtwBzHfVJ8RlxP52RWdmKw/mF7Prq+H+Tyb3jXtZQMBQSdaDdwMedZR7O6 dhg6YzGu0u9KTg5pbKIcrZlMBXWnTsw3oUWX4JVhgMYzo8Lf2CfXkRZzrEpB18rz49Ti Yfhw== X-Gm-Message-State: AOAM531VlX7HzC1GCm3SNJy3nQaHhfhNdog6wO+Oa81N647MfZZ4x10S /4muBMNT28SgxELySXau6z8v5vPPxTlDTD+VPiVq5rtFvLTX X-Google-Smtp-Source: ABdhPJyTuZiNhr6gvdFfBm/ajJWD30CNwXz1+WuBVFi0bwZzODg1U/2AaOweFNXPpNZtFIgWayvObs0kOv9VixQydFh7IGZr+EmY MIME-Version: 1.0 X-Received: by 2002:a05:6602:1243:: with SMTP id o3mr2625484iou.13.1624511836281; Wed, 23 Jun 2021 22:17:16 -0700 (PDT) Date: Wed, 23 Jun 2021 22:17:16 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000ef5d1b05c57c2262@google.com> Subject: [syzbot] KASAN: out-of-bounds Read in do_exit From: syzbot To: akpm@linux-foundation.org, ast@kernel.org, christian@brauner.io, ebiederm@xmission.com, jnewsome@torproject.org, linux-kernel@vger.kernel.org, minchan@kernel.org, oleg@redhat.com, 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: 9ed13a17 Merge tag 'net-5.13-rc7' of git://git.kernel.org/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=116c517bd00000 kernel config: https://syzkaller.appspot.com/x/.config?x=bf635d6d1c7ebabc dashboard link: https://syzkaller.appspot.com/bug?extid=b80bbdcca4c4dfaa189e compiler: Debian clang version 11.0.1-2 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+b80bbdcca4c4dfaa189e@syzkaller.appspotmail.com ================================================================== BUG: KASAN: out-of-bounds in stack_not_used include/linux/sched/task_stack.h:101 [inline] BUG: KASAN: out-of-bounds in check_stack_usage kernel/exit.c:711 [inline] BUG: KASAN: out-of-bounds in do_exit+0x1c6b/0x23d0 kernel/exit.c:869 Read of size 8 at addr ffffc90017d60400 by task loop0/31717 CPU: 0 PID: 31717 Comm: loop0 Not tainted 5.13.0-rc6-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+0x202/0x31e lib/dump_stack.c:120 print_address_description+0x5f/0x3b0 mm/kasan/report.c:233 __kasan_report mm/kasan/report.c:419 [inline] kasan_report+0x15c/0x200 mm/kasan/report.c:436 stack_not_used include/linux/sched/task_stack.h:101 [inline] check_stack_usage kernel/exit.c:711 [inline] do_exit+0x1c6b/0x23d0 kernel/exit.c:869 kthread+0x3b8/0x3c0 kernel/kthread.c:315 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Memory state around the buggy address: ffffc90017d60300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90017d60380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90017d60400: 07 07 07 07 07 07 07 07 00 00 00 00 00 00 00 00 ^ ffffc90017d60480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90017d60500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== --- 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.