io_uring: add a warn_once for poll_find

[platform/kernel/linux-starfive.git] / io_uring / poll.c

diff --git a/io_uring/poll.c b/io_uring/poll.c
index cbf44c3..bd31107 100644 (file)
--- a/io_uring/poll.c
+++ b/io_uring/poll.c
@@ -833,6 +833,11 @@ int io_poll_remove(struct io_kiocb *req, unsigned int issue_flags)
        }
 
 found:
+       if (WARN_ON_ONCE(preq->opcode != IORING_OP_POLL_ADD)) {
+               ret = -EFAULT;
+               goto out;
+       }
+
        if (poll_update->update_events || poll_update->update_user_data) {
                /* only mask one event flags, keep behavior flags */
                if (poll_update->update_events) {