Re: select(2) regression?

On 2025-09-23 00:58, Konstantin Belousov wrote:
>> possible with 0 nfds and empty fd sets. Note that the problem is in vgdb
>> which is a plain C exe not running under Valgrind. I'll see if I can make a
>> smaller reproducer. This is on amd64. It looks like a regression to me -
>> select worked as expected as far as I can remember going back to FreeBSD 10.
> Yes please show the minimal complete reproducer.


I haven't had time to try to produce a small reproducer. However the 
problem goes away with

sysctl security.bsd.stack_guard_page=0

I've added a comment to this effect to 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=290008

A+

Paul