WSAPoll first argument cannot be NULL

[M-a-r-c-0]

netevent.c contains code like: WSAPoll(NULL, 0, (SEND_BLOCKED_WAIT_TIMEOUT/10)<<(retries+1));

But according to the MS documentation, the first argument cannot be NULL. The exact error message was "error: poll udp out failed: invalid argument".

We have not yet figured out how to reproduce it, sorry.

System:

• Unbound version: v1.22
• OS: Windows 10

[wcawijngaards]

The fix commit removes the POLLHUP event from the WSAPoll call. I also changed the WSAPoll call with the NULL argument to a Sleep call, it has no arguments and takes the timeout to wait for.

In the link there is a compile of the code repo of today, that includes this fix, at https://www.nlnetlabs.nl/~wouter/unbound-1.22.1_20250318.zip (the executables) and https://www.nlnetlabs.nl/~wouter/unbound_setup_1.22.1_20250318.exe (the installer).

[M-a-r-c-0]

Whoa, that was fast! We'll try to reproduce the issue and will report back.