[zcrx-next 3/8] io_uring/zcrx: check all niovs filled with dma addresses

[Pavel Begunkov <asml.silence@gmail.com>]

Add a warning if io_populate_area_dma() can't fill in all net_iovs, it
should never happen.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
 io_uring/zcrx.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/io_uring/zcrx.c b/io_uring/zcrx.c
index ea62e13b9500..be6d59401dc7 100644
--- a/io_uring/zcrx.c
+++ b/io_uring/zcrx.c
@@ -77,6 +77,9 @@ static int io_populate_area_dma(struct io_zcrx_ifq *ifq,
 			niov_idx++;
 		}
 	}
+
+	if (WARN_ON_ONCE(niov_idx != area->nia.num_niovs))
+		return -EFAULT;
 	return 0;
 }
 
-- 
2.49.0