diff --git a/fs/io_uring.c b/fs/io_uring.c
index 02ebfc46228a963df5ddac8b6c7d20f1fc2983d0..f661231cdfad6e9a94dce09774cd293bcbe8d9fa 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -216,7 +216,7 @@ struct fixed_file_data {
 struct io_buffer {
 	struct list_head list;
 	__u64 addr;
-	__s32 len;
+	__u32 len;
 	__u16 bid;
 };
 
@@ -3523,7 +3523,7 @@ static int io_add_buffers(struct io_provide_buf *pbuf, struct io_buffer **head)
 			break;
 
 		buf->addr = addr;
-		buf->len = pbuf->len;
+		buf->len = min_t(__u32, pbuf->len, MAX_RW_COUNT);
 		buf->bid = bid;
 		addr += pbuf->len;
 		bid++;