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Athanasios Douitsis authored
The getaddrinfo call in line 54 sets &h to a struct addrinfo. If a canonical name cannot be found for the node argument of getaddrinfo, h->ai_canonname is set to NULL. In that case, the strchr call in line 58 can lead to segfault. This behavior was observed on a macos sierra while the hostname was 192.168.1.3 (unfortunately this happens quite often in macos). The fix is simple, just check h->ai_canonname for the NULL value.
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