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From: Jens Axboe <[email protected]>
To: syzbot <[email protected]>,
	[email protected], [email protected],
	[email protected], [email protected]
Subject: Re: [syzbot] INFO: task hung in io_uring_del_tctx_node
Date: Thu, 23 Sep 2021 20:43:45 -0600	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

On 9/23/21 7:57 PM, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    92477dd1faa6 Merge tag 's390-5.15-ebpf-jit-fixes' of git:/..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=1471785b300000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=e917f3dfc452c977
> dashboard link: https://syzkaller.appspot.com/bug?extid=111d2a03f51f5ae73775
> 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=1511c4f7300000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=132d1d1d300000


diff --git a/fs/io_uring.c b/fs/io_uring.c
index fe5e613b960f..efb244deb081 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -9636,8 +9641,10 @@ static void io_uring_clean_tctx(struct io_uring_task *tctx)
 	struct io_tctx_node *node;
 	unsigned long index;
 
-	xa_for_each(&tctx->xa, index, node)
+	xa_for_each(&tctx->xa, index, node) {
 		io_uring_del_tctx_node(index);
+		cond_resched();
+	}
 	if (wq) {
 		/*
 		 * Must be after io_uring_del_task_file() (removes nodes under

-- 
Jens Axboe


      reply	other threads:[~2021-09-24  2:43 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-24  1:57 [syzbot] INFO: task hung in io_uring_del_tctx_node syzbot
2021-09-24  2:43 ` Jens Axboe [this message]

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