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Date: Sun, 31 Oct 2021 13:40:48 -0600 From: Jens Axboe <axboe@...nel.dk> To: syzbot <syzbot+e4f5deeeccdd5a4873fe@...kaller.appspotmail.com>, asml.silence@...il.com, fweisbec@...il.com, io-uring@...r.kernel.org, linux-kernel@...r.kernel.org, mingo@...nel.org, syzkaller-bugs@...glegroups.com, tglx@...utronix.de, xiaoguang.wang@...ux.alibaba.com Subject: Re: [syzbot] INFO: rcu detected stall in tctx_task_work On 10/31/21 11:40 AM, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: bdcc9f6a5682 Add linux-next specific files for 20211029 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=10be38f4b00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=4b504bcb4c507265 > dashboard link: https://syzkaller.appspot.com/bug?extid=e4f5deeeccdd5a4873fe > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10b915d4b00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1395f3e2b00000 > > The issue was bisected to: > > commit 34ced75ca1f63fac6148497971212583aa0f7a87 > Author: Xiaoguang Wang <xiaoguang.wang@...ux.alibaba.com> > Date: Mon Oct 25 05:38:48 2021 +0000 > > io_uring: reduce frequent add_wait_queue() overhead for multi-shot poll request This was dropped from the tree last week: #syz invalid -- Jens Axboe
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