linux-kernel - [PATCH 5.4 21/92] io_uring: transform send/recvmsg() -ERESTARTSYS to -EINTR

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Message-Id: <20191211150228.498762084@linuxfoundation.org>
Date:   Wed, 11 Dec 2019 16:05:12 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jens Axboe <axboe@...nel.dk>
Subject: [PATCH 5.4 21/92] io_uring: transform send/recvmsg() -ERESTARTSYS to -EINTR

From: Jens Axboe <axboe@...nel.dk>

commit 441cdbd5449b4923cd413d3ba748124f91388be9 upstream.

We should never return -ERESTARTSYS to userspace, transform it into
-EINTR.

Cc: stable@...r.kernel.org # v5.3+
Signed-off-by: Jens Axboe <axboe@...nel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/io_uring.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1667,6 +1667,8 @@ static int io_send_recvmsg(struct io_kio
 		ret = fn(sock, msg, flags);
 		if (force_nonblock && ret == -EAGAIN)
 			return ret;
+		if (ret == -ERESTARTSYS)
+			ret = -EINTR;
 	}
 
 	io_cqring_add_event(req->ctx, sqe->user_data, ret);