Author :
Sergey Fionov
Date :
2018-08-02 00:35:28
Hash :b59525ec Message :evdns: fix race condition in evdns_getaddrinfo()
evdns_getaddrinfo() starts two parallel requests for A and AAAA record.
But if request is created from thread different from dns_base's, request of A record is
started immediately and may result in calling free_getaddrinfo_request() from
evdns_getaddrinfo_gotresolve() because `other_req' doesn't exist yet.
After that, request of AAAA record starts and finishes, and evdns_getaddrinfo_gotresolve()
is called again for structure that is already freed.
This commits adds locking into evdns_getaddrinfo() function.
Sergey Fionov