From 39de31a114d089fc5d5de74f0b83213cce6250fe Mon Sep 17 00:00:00 2001
From: Pavel Begunkov <asml.silence@gmail.com>
Date: Thu, 15 Apr 2021 17:33:28 +0800
Subject: [PATCH] io_uring: Fix getting file for non-fd opcodes

mainline inclusion
from mainline-5.5-rc1
commit a320e9fa1e2680116d165b9369dfa41d7cc1e1d1
category: feature
bugzilla: https://bugzilla.openeuler.org/show_bug.cgi?id=27
CVE: NA
---------------------------

For timeout requests and bunch of others io_uring tries to grab a file
with specified fd, which is usually stdin/fd=0.
Update io_op_needs_file()

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 | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index a26de4143f3a..669412171799 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2614,6 +2614,9 @@ static bool io_op_needs_file(const struct io_uring_sqe *sqe)
 	case IORING_OP_NOP:
 	case IORING_OP_POLL_REMOVE:
 	case IORING_OP_TIMEOUT:
+	case IORING_OP_TIMEOUT_REMOVE:
+	case IORING_OP_ASYNC_CANCEL:
+	case IORING_OP_LINK_TIMEOUT:
 		return false;
 	default:
 		return true;
-- 
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