From 64c7212391e778949aa3055fb3863439417ddba9 Mon Sep 17 00:00:00 2001
From: Pavel Begunkov <asml.silence@gmail.com>
Date: Mon, 1 Mar 2021 18:20:45 +0000
Subject: [PATCH] io_uring: choose right tctx->io_wq for try cancel
When we cancel SQPOLL, @task in io_uring_try_cancel_requests() will
differ from current. Use the right tctx from passed in @task, and don't
forget that it can be NULL when the io_uring ctx exits.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
fs/io_uring.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 361befaae28f4..d6c5465b372b4 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -8636,7 +8636,8 @@ static void io_uring_try_cancel_requests(struct io_ring_ctx *ctx,
struct files_struct *files)
{
struct io_task_cancel cancel = { .task = task, .files = files, };
- struct io_uring_task *tctx = current->io_uring;
+ struct task_struct *tctx_task = task ?: current;
+ struct io_uring_task *tctx = tctx_task->io_uring;
while (1) {
enum io_wq_cancel cret;
--
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