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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 465E6C433EF for ; Mon, 25 Oct 2021 11:16:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 27F4E60EFF for ; Mon, 25 Oct 2021 11:16:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230216AbhJYLSm (ORCPT ); Mon, 25 Oct 2021 07:18:42 -0400 Received: from mail-io1-f70.google.com ([209.85.166.70]:39894 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230137AbhJYLSm (ORCPT ); Mon, 25 Oct 2021 07:18:42 -0400 Received: by mail-io1-f70.google.com with SMTP id r15-20020a6b600f000000b005dde03edc0cso8620501iog.6 for ; Mon, 25 Oct 2021 04:16:20 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=e5NZpnxNaJyqowu2CwdQsqPF7xPZW737SvpJi76W8ug=; b=n9ideF7CgI2qivDtO2s+oalYKltE/Vt1Yo3lobGLHvWVr5bhFcBc0iPJDHbUvTKchD r/NzzO0r7nOedBJvOcYHRfoX2nWX7oQ9ypMFA7iil5RniKZP28jefoEmG6kLmeGZdmY7 LjfqzwUtobZggJiqEhGejpF6IEd8eZApKyZKCH1DXUiOhtdAhZW5IRgVpodvu+Dfa/BA 7Fjk/8Q1S3uts2LBINQnok1w189XsZSXIkhrE2erdbU7SQIw5r6qKNDdZkhrZoKGeFRL dRz95xZoeKOuJBzodzLj13L5KWJSDPG86FslJXWx147U8+GORYLZ5kBYu9eH2PhmC/B9 iz7w== X-Gm-Message-State: AOAM533wU1mXtKcoPb8dyiN6C/Y+fdzG7xdKsIY2GbRF0D0FTQkq1Sgd MfkD1+nj0+xXInLmpU7BZGq19HBiXivdcifZweyFpNpyg9W2 X-Google-Smtp-Source: ABdhPJzo+aUH+MCnAiTyEKu9F1hOnOjluvS1f1YeBNl20elMwblC8Pwoj2lnN2D+PF7gkxeop3KeAPEK/Bec1UkyTKVRAIuRQmsj MIME-Version: 1.0 X-Received: by 2002:a02:ccfb:: with SMTP id l27mr4492245jaq.98.1635160580260; Mon, 25 Oct 2021 04:16:20 -0700 (PDT) Date: Mon, 25 Oct 2021 04:16:20 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000089871905cf2b7d09@google.com> Subject: [syzbot] KCSAN: data-race in sbitmap_queue_clear / sbitmap_queue_clear (3) From: syzbot To: axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 2f111a6fd5b5 Merge tag 'ceph-for-5.15-rc7' of git://github.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10dae330b00000 kernel config: https://syzkaller.appspot.com/x/.config?x=b2868748300e5cf6 dashboard link: https://syzkaller.appspot.com/bug?extid=4f8bfd804b4a1f95b8f6 compiler: Debian clang version 11.0.1-2, GNU ld (GNU Binutils for Debian) 2.35.2 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+4f8bfd804b4a1f95b8f6@syzkaller.appspotmail.com ================================================================== BUG: KCSAN: data-race in sbitmap_queue_clear / sbitmap_queue_clear write to 0xffffe8ffffd145b8 of 4 bytes by interrupt on cpu 1: sbitmap_queue_clear+0xca/0xf0 lib/sbitmap.c:606 blk_mq_put_tag+0x82/0x90 __blk_mq_free_request+0x114/0x180 block/blk-mq.c:507 blk_mq_free_request+0x2c8/0x340 block/blk-mq.c:541 __blk_mq_end_request+0x214/0x230 block/blk-mq.c:565 blk_mq_end_request+0x37/0x50 block/blk-mq.c:574 lo_complete_rq+0xca/0x170 drivers/block/loop.c:541 blk_complete_reqs block/blk-mq.c:584 [inline] blk_done_softirq+0x69/0x90 block/blk-mq.c:589 __do_softirq+0x12c/0x26e kernel/softirq.c:558 run_ksoftirqd+0x13/0x20 kernel/softirq.c:920 smpboot_thread_fn+0x22f/0x330 kernel/smpboot.c:164 kthread+0x262/0x280 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 write to 0xffffe8ffffd145b8 of 4 bytes by interrupt on cpu 0: sbitmap_queue_clear+0xca/0xf0 lib/sbitmap.c:606 blk_mq_put_tag+0x82/0x90 __blk_mq_free_request+0x114/0x180 block/blk-mq.c:507 blk_mq_free_request+0x2c8/0x340 block/blk-mq.c:541 __blk_mq_end_request+0x214/0x230 block/blk-mq.c:565 blk_mq_end_request+0x37/0x50 block/blk-mq.c:574 lo_complete_rq+0xca/0x170 drivers/block/loop.c:541 blk_complete_reqs block/blk-mq.c:584 [inline] blk_done_softirq+0x69/0x90 block/blk-mq.c:589 __do_softirq+0x12c/0x26e kernel/softirq.c:558 run_ksoftirqd+0x13/0x20 kernel/softirq.c:920 smpboot_thread_fn+0x22f/0x330 kernel/smpboot.c:164 kthread+0x262/0x280 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 value changed: 0x00000035 -> 0x00000044 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 10 Comm: ksoftirqd/0 Not tainted 5.15.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ================================================================== --- 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.