[PATCH RFC v4 13/15] fuse: {uring} Handle IO_URING_F_TASK_DEAD

[Bernd Schubert <bschubert@ddn.com>]

The ring task is terminating, it not safe to still access
its resources. Also no need for further actions.

Signed-off-by: Bernd Schubert <bschubert@ddn.com>
---
 fs/fuse/dev_uring.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/fs/fuse/dev_uring.c b/fs/fuse/dev_uring.c
index 6af14a32e908bcb82767ab1bf1f78d83329f801a..6632c9163b8a51c39e07258fea631cf9383ce538 100644
--- a/fs/fuse/dev_uring.c
+++ b/fs/fuse/dev_uring.c
@@ -986,16 +986,22 @@ fuse_uring_send_req_in_task(struct io_uring_cmd *cmd,
 
 	BUILD_BUG_ON(sizeof(pdu) > sizeof(cmd->pdu));
 
+	if (unlikely(issue_flags & IO_URING_F_TASK_DEAD)) {
+		err = -ECANCELED;
+		goto terminating;
+	}
+
 	err = fuse_uring_prepare_send(ring_ent);
 	if (err)
 		goto err;
 
-	io_uring_cmd_done(cmd, 0, 0, issue_flags);
-
+terminating:
 	spin_lock(&queue->lock);
 	ring_ent->state = FRRS_USERSPACE;
 	list_move(&ring_ent->list, &queue->ent_in_userspace);
 	spin_unlock(&queue->lock);
+	io_uring_cmd_done(cmd, err, 0, issue_flags);
+
 	return;
 err:
 	fuse_uring_next_fuse_req(ring_ent, queue);

-- 
2.43.0