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daemon: handle gethostbyname() error

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If the user-supplied hostname can't be found then we should not use it.
We already avoid doing that in the non-NO_IPV6 case by checking if the
return value of getaddrinfo() is zero (success).  Do the same in the
NO_IPV6 case and make sure the return value of gethostbyname() isn't
NULL before dereferencing this pointer.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
René Scharfe 2014-10-01 12:16:17 +02:00 committed by Junio C Hamano
parent e6aaa39347
commit eb6c403500
1 changed files with 13 additions and 12 deletions
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3
daemon.c
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@ -579,7 +579,7 @@ static void parse_host_arg(char *extra_args, int buflen)
static char addrbuf[HOST_NAME_MAX + 1];
hent = gethostbyname(hostname);
if (hent) {
ap = hent->h_addr_list;
memset(&sa, 0, sizeof sa);
sa.sin_family = hent->h_addrtype;
@ -593,6 +593,7 @@ static void parse_host_arg(char *extra_args, int buflen)
canon_hostname = xstrdup(hent->h_name);
free(ip_address);
ip_address = xstrdup(addrbuf);
}
#endif
}
}