While working on debugging an issue reported in c-ares, I noticed some
test case failures in inet_net_pton(). I haven't evaluated most of
them, however one stood out:
../test/ares-test-internal.cc:150: Failure
Expected: -1
To be equal to: inet_net_pton(24,"12:34::ff",&a6,sizeof(a6) - 1)
Which is: 128
This test expects inet_net_pton() to fail because the buffer provided
was of insufficient size.
I'm not all that familiar with OpenBSD itself, a quick google search
turned up this as the possible source:
https://github.com/libressl-portable/openbsd/blob/master/src/lib/libc/net/inet_net_pton.c
The 'size' parameter to inet_net_pton_ipv6() is *never* used:
https://github.com/libressl-portable/openbsd/blob/master/src/lib/libc/net/inet_net_pton.c#L206
I believe this failure ends up later causing other test failures due to
memory corruption in the c-ares test cases.
