From 329463fab5e8d05e8898cfb8c175a49a482e1520 Mon Sep 17 00:00:00 2001
From: Pavel Begunkov <asml.silence@gmail.com>
Date: Thu, 15 Apr 2021 17:31:25 +0800
Subject: [PATCH] io_uring: Fix __io_uring_register() false success

mainline inclusion
from mainline-5.2-rc3
commit a278682dad37fd2f8d2f30d8e84e376a856ab472
category: feature
bugzilla: https://bugzilla.openeuler.org/show_bug.cgi?id=27
CVE: NA
---------------------------

If io_copy_iov() fails, it will break the loop and report success,
albeit partially completed operation.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: yangerkun <yangerkun@huawei.com>
Reviewed-by: zhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: Cheng Jian <cj.chengjian@huawei.com>
---
 fs/io_uring.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 62a73623601d..3229b34e0fe0 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2609,7 +2609,7 @@ static int io_sqe_buffer_register(struct io_ring_ctx *ctx, void __user *arg,
 
 		ret = io_copy_iov(ctx, &iov, arg, i);
 		if (ret)
-			break;
+			goto err;
 
 		/*
 		 * Don't impose further limits on the size and buffer
-- 
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