[pgpool-committers: 5825] pgpool: Fix segfault when "samenet" is specified in pool_hba.conf.

[Tatsuo Ishii]

Fix segfault when "samenet" is specified in pool_hba.conf.

When "samenet" is specified, SockAddr_cidr_mask(struct
sockaddr_storage *mask, char *numbits, int family) gets called with
numbits == NULL. However the function was not prepared for
it. Originally the function was imported from PostgreSQL. When the bug
was fixed in PostgreSQL, unfortunately the fix was not applied to
Pgpool-II. This commit applies the same fix as PostgreSQL.

Discussion: [pgpool-general: 6601] Pgpool-II + hba + samenet = segfault in libc-2.24.so

Branch
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V4_0_STABLE

Details
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https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=8742f9fb1c4ea5a4fd4131425452511e95baee18

Modified Files
--------------
src/utils/pool_ip.c | 24 +++++++++++++-----------
1 file changed, 13 insertions(+), 11 deletions(-)