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[23.128.96.18]) by mx.google.com with ESMTP id r17si350067ejr.194.2020.11.10.19.10.29; Tue, 10 Nov 2020 19:10:52 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725899AbgKKDJH (ORCPT + 99 others); Tue, 10 Nov 2020 22:09:07 -0500 Received: from mail-io1-f69.google.com ([209.85.166.69]:49475 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725839AbgKKDJH (ORCPT ); Tue, 10 Nov 2020 22:09:07 -0500 Received: by mail-io1-f69.google.com with SMTP id v15so468633ioq.16 for ; Tue, 10 Nov 2020 19:09:05 -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:in-reply-to:message-id:subject :from:to; bh=wf9hL6Te9sp/yqa+Doc2BxzTapoLp41NMYlihKhsE5U=; b=HrdFIVRasyt8qp9YZgfmEx6TA1IkYTZ6xD9Va5+PRGLk1EuIrpXHmFokXXwwdNO+yv IRiikUz1i57AlpTpGjm7pP+8Ls7w8lEwAeSLS1Kn6Eo421yZOaHVl4xJHHctNYTUChRn vAobqVBdLDStbp5S2hZWQfOIf2Psd4uIkVkBtZVj89GKLvN7ECRPP4AfqN/XPjT+GbAa j/oVV5+iwPdjXpYFgfdyVmMNqGX4X0RxiKZMRf+A9iA9WBuJSLqKco4v+/+twTLUyXOS kR/k2jx+zvxYWgU51jnBWrS9oDlePwnYArxl21/+iBukFG9S0r6MbcOUojm5zGDy/Es1 t9zw== X-Gm-Message-State: AOAM531kgO8YGVQfqkwX5rBo9zq+kYWQ7m8RX05pu2NpeqAr07S3+JHh OMoiRZTeo5P38htltpxdBKg6zsGCIO+WtYEYeiGzexA39dsS MIME-Version: 1.0 X-Received: by 2002:a92:ba14:: with SMTP id o20mr17040042ili.76.1605064145162; Tue, 10 Nov 2020 19:09:05 -0800 (PST) Date: Tue, 10 Nov 2020 19:09:05 -0800 In-Reply-To: <000000000000b09d8c059a3240be@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000036d7e005b3cc1e79@google.com> Subject: Re: WARNING in percpu_ref_exit (2) From: syzbot To: axboe@kernel.dk, ebiggers@kernel.org, hdanton@sina.com, io-uring@vger.kernel.org, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, paulmck@kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot suspects this issue was fixed by commit: commit c1e2148f8ecb26863b899d402a823dab8e26efd1 Author: Jens Axboe Date: Wed Mar 4 14:25:50 2020 +0000 io_uring: free fixed_file_data after RCU grace period bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=161ea46e500000 start commit: 63849c8f Merge tag 'linux-kselftest-5.6-rc5' of git://git... git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=4527d1e2fb19fd5c dashboard link: https://syzkaller.appspot.com/bug?extid=8c4a14856e657b43487c syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13c30061e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1251b731e00000 If the result looks correct, please mark the issue as fixed by replying with: #syz fix: io_uring: free fixed_file_data after RCU grace period For information about bisection process see: https://goo.gl/tpsmEJ#bisection