Re: passt crashes a) hides error b) assert tripped

[contact@jbartunek.de]

Hi Laurent,

Thanks for getting back to me so quickly!

On 2026-11-09 08:12, Laurent Vivier wrote:
> 
> In fact the assertion should be:
> 
> assert((size_t)cnt <= ARRAY_SIZE(iov_msg) - j);
> 
> Could you try to update it and move it after the "if (cnt < 0) 
> die("Missing entries in iov_msg");"?

Sure I used
```
diff --git a/tcp_vu.c b/tcp_vu.c
index 868a35b..cee9cf6 100644
--- a/tcp_vu.c
+++ b/tcp_vu.c
@@ -291,9 +291,9 @@ static ssize_t tcp_vu_sock_recv(const struct ctx *c, 
struct vu_virtq *vq,

                 cnt = iov_tail_clone(&iov_msg[j], ARRAY_SIZE(iov_msg) - 
j,
                                      &data);
-               assert(cnt < ARRAY_SIZE(iov_msg) - j);
                 if (cnt < 0)
                         die("Missing entries in iov_msg");
+               assert((size_t)cnt <= ARRAY_SIZE(iov_msg) - (size_t)j);

                 j += cnt;
         }
```
on top of `2026_10_02.cba3570` (note the additional cast for j).

I tried it again with my setup: 0 crashes, it just works (TM), large 
download all. Thank you so much!

All the best,

John