[PATCH RFC v3 16/17] 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 | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/fs/fuse/dev_uring.c b/fs/fuse/dev_uring.c
index 43e7486d9f93..a65c5d08fce1 100644
--- a/fs/fuse/dev_uring.c
+++ b/fs/fuse/dev_uring.c
@@ -993,6 +993,9 @@ 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))
+		goto terminating;
+
 	err = fuse_uring_prepare_send(ring_ent);
 	if (err)
 		goto err;
@@ -1007,6 +1010,10 @@ fuse_uring_send_req_in_task(struct io_uring_cmd *cmd,
 	return;
 err:
 	fuse_uring_next_fuse_req(ring_ent, queue);
+
+terminating:
+	/* Avoid all actions as the task that issues the ring is terminating */
+	io_uring_cmd_done(cmd, -ECANCELED, 0, issue_flags);
 }
 
 /* queue a fuse request and send it if a ring entry is available */

-- 
2.43.0