https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=214881
--- Comment #3 from a...@playground.ru ---
Things apprear to be even worse. This code will overwrite root and leak old
reference if path==NULL and root!=NULL.
1218 if (path == NULL) {
1219 path = "/";
1220 root = mypr->pr_root;
1221 vref(root);
1222 }
And this exactly happens in case of disablefullpath=1 and path="/".
path==NULL means "nothing done for path"
Adding patch to do proper fix for all this.
Also i can note that pr->pr_path will be anyway unreliable in case of
disablefullpath=1 and relative path given as argument (it doesn't event try to
be). But i don't think it is important for rarely-used (if even used, don't
know) debugging feature.
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