diff options
| author | Florian Weimer <fweimer@redhat.com> | 2022-08-30 10:02:49 +0200 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2022-09-21 19:37:24 +0200 |
| commit | c36e7cca3571b0c92b09409c1df86a142596c210 (patch) | |
| tree | 78545bbb0cc47b46beddc7f8e32297e034562c64 | |
| parent | 9abc40d9b514fc51cd1a052d32d092a827c6e21a (diff) | |
| download | glibc-c36e7cca3571b0c92b09409c1df86a142596c210.tar.gz glibc-c36e7cca3571b0c92b09409c1df86a142596c210.tar.xz glibc-c36e7cca3571b0c92b09409c1df86a142596c210.zip | |
nss_dns: In gaih_getanswer_slice, skip strange aliases (bug 12154)
If the name is not a host name, skip adding it to the result, instead of reporting query failure. This fixes bug 12154 for getaddrinfo. This commit still keeps the old parsing code, and only adjusts when a host name is copied. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org> (cherry picked from commit 32b599ac8c21c4c332cc3900a792a1395bca79c7)
| -rw-r--r-- | resolv/nss_dns/dns-host.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/resolv/nss_dns/dns-host.c b/resolv/nss_dns/dns-host.c index f691e79949..2d8b839568 100644 --- a/resolv/nss_dns/dns-host.c +++ b/resolv/nss_dns/dns-host.c @@ -949,12 +949,12 @@ gaih_getanswer_slice (const querybuf *answer, int anslen, const char *qname, n = -1; } - if (__glibc_unlikely (n < 0 || __libc_res_hnok (buffer) == 0)) + if (__glibc_unlikely (n < 0)) { ++had_error; continue; } - if (*firstp && canon == NULL) + if (*firstp && canon == NULL && __libc_res_hnok (buffer)) { h_name = buffer; buffer += h_namelen; @@ -1000,14 +1000,14 @@ gaih_getanswer_slice (const querybuf *answer, int anslen, const char *qname, n = __libc_dn_expand (answer->buf, end_of_message, cp, tbuf, sizeof tbuf); - if (__glibc_unlikely (n < 0 || __libc_res_hnok (tbuf) == 0)) + if (__glibc_unlikely (n < 0)) { ++had_error; continue; } cp += n; - if (*firstp) + if (*firstp && __libc_res_hnok (tbuf)) { /* Reclaim buffer space. */ if (h_name + h_namelen == buffer) |