linux-kernel - Re: [syzbot] [netfs?] INFO: task hung in netfs_unbuffered_write

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Message-ID: <tencent_BE4FFF8D8C259C0DE7126FDD8A5D96992507@qq.com>
Date: Mon, 24 Mar 2025 20:49:10 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+62262fdc0e01d99573fc@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [netfs?] INFO: task hung in netfs_unbuffered_write_iter

#syz test: upstream aaec5a95d

diff --git a/fs/pipe.c b/fs/pipe.c
index 4d0799e4e719..bc683599a5bf 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -396,6 +396,9 @@ pipe_read(struct kiocb *iocb, struct iov_iter *to)
 	}
 	if (pipe_is_empty(pipe))
 		wake_next_reader = false;
+
+	wake_writer = pipe_full(pipe->head, pipe->tail, pipe->max_usage);;
+
 	mutex_unlock(&pipe->mutex);
 
 	if (wake_writer)