linux-kernel - [PATCH v2 4/5] io_uring: Fix missing save the current thread files

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Message-Id: <20200923114419.71218-5-songmuchun@bytedance.com>
Date:   Wed, 23 Sep 2020 19:44:18 +0800
From:   Muchun Song <songmuchun@...edance.com>
To:     axboe@...nel.dk, viro@...iv.linux.org.uk
Cc:     linux-fsdevel@...r.kernel.org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, zhuyinyin@...edance.com,
        Muchun Song <songmuchun@...edance.com>
Subject: [PATCH v2 4/5] io_uring: Fix missing save the current thread files

We forget to save the current thread files, in this case, we can not
send SIGINT signal to the kworker because the files is not equal.

Fixes: 54ee77961e79 ("io_uring: Fix NULL pointer dereference in io_sq_wq_submit_work()")
Signed-off-by: Muchun Song <songmuchun@...edance.com>
---
 fs/io_uring.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 12e68ea00a543..c65f78f395655 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2391,6 +2391,8 @@ static bool io_add_to_prev_work(struct async_list *list, struct io_kiocb *req)
 	if (ret) {
 		struct io_ring_ctx *ctx = req->ctx;
 
+		req->files = current->files;
+
 		spin_lock_irq(&ctx->task_lock);
 		list_add(&req->task_list, &ctx->task_list);
 		req->work_task = NULL;
-- 
2.11.0