getaddrinfo() returns addresses from, at least, ip(7) and ipv6(7), but _addr() always uses sin_addr from struct sockaddr_in; we're saved from wild unsoundness (or incompatibility) by virtue of struct sockaddr_in6 having an always-0 u32 sin6_flowinfo at the same offset, so we end up returning 0 anyway, but in a round-about and definitely unintended way
Instead, limit the request to AF_INET, and fall through to the end
early, returning the default id=0
---
diff -ur uClibc-ng-1.0.41.orig/libc/inet/hostid.c
uClibc-ng-1.0.41/libc/inet/hostid.c
--- uClibc-ng-1.0.41.orig/libc/inet/hostid.c 2022-05-20 17:07:47.000000000
+0200
+++ uClibc-ng-1.0.41/libc/inet/hostid.c 2022-06-01 19:09:21.971253011 +0200
@@ -61,8 +61,7 @@
* Mitch
*/
if (gethostname(host, HOST_NAME_MAX) >= 0 && *host) {
- struct addrinfo hints, *results, *addr;
- memset(&hints, 0, sizeof(struct addrinfo));
+ struct addrinfo hints = {.ai_family = AF_INET}, *results, *addr;
if (!getaddrinfo(host, NULL, &hints, &results)) {
for (addr = results; addr; addr = results->ai_next) {
/* Just so it doesn't look exactly like the
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