illumos gate

Copied and pasted from an email to the userland list:
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I just would like to draw attention to this patch: https://github.com/illumos/illumos-gate/commit/84615402a46a91be66843bd64e4fb72642b06e9d

After this patch some programs may start generating duplicated UUID.

Here is scenario to demonstrate the difference between patched and non-patched version:

#!/usr/bin/perl
use UUID;

sub get_new_uuid {
UUID::generate(my $uuid);
UUID::unparse($uuid, my $string);
return $string;
}

my $u = get_new_uuid();

unless (fork) {
print get_new_uuid() . "\\n";
exit;
}

unless (fork) {
print get_new_uuid() . "\\n";
exit;
}

sleep 1;

Output without patch:
cc9b9de4-8c0e-4885-d9a1-81b96a8b7e18
1470cbb2-a979-66c7-cd4d-e15aea3c2ccc

Output with patch:
b2b01b94-133e-4ceb-8c3c-d804a380a477
b2b01b94-133e-4ceb-8c3c-d804a380a477

Regards,
Alexey Komarov