57 lines
1.8 KiB
Diff
57 lines
1.8 KiB
Diff
From 7a236dc44a22dc4252e803d1ee1d3b970ec43805 Mon Sep 17 00:00:00 2001
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From: Florian Weimer <fweimer@redhat.com>
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Date: Tue, 30 Aug 2022 10:02:49 +0200
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Subject: [PATCH 33/81] nss_dns: In gaih_getanswer_slice, skip strange aliases
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(bug 12154)
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If the name is not a host name, skip adding it to the result, instead
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of reporting query failure. This fixes bug 12154 for getaddrinfo.
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This commit still keeps the old parsing code, and only adjusts when
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a host name is copied.
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Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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(cherry picked from commit 32b599ac8c21c4c332cc3900a792a1395bca79c7)
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---
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resolv/nss_dns/dns-host.c | 8 ++++----
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1 file changed, 4 insertions(+), 4 deletions(-)
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diff --git a/resolv/nss_dns/dns-host.c b/resolv/nss_dns/dns-host.c
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index b887e77e9c..bea505d697 100644
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--- a/resolv/nss_dns/dns-host.c
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+++ b/resolv/nss_dns/dns-host.c
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@@ -970,12 +970,12 @@ gaih_getanswer_slice (const querybuf *answer, int anslen, const char *qname,
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n = -1;
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}
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- if (__glibc_unlikely (n < 0 || __libc_res_hnok (buffer) == 0))
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+ if (__glibc_unlikely (n < 0))
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{
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++had_error;
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continue;
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}
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- if (*firstp && canon == NULL)
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+ if (*firstp && canon == NULL && __libc_res_hnok (buffer))
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{
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h_name = buffer;
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buffer += h_namelen;
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@@ -1021,14 +1021,14 @@ gaih_getanswer_slice (const querybuf *answer, int anslen, const char *qname,
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n = __libc_dn_expand (answer->buf, end_of_message, cp,
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tbuf, sizeof tbuf);
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- if (__glibc_unlikely (n < 0 || __libc_res_hnok (tbuf) == 0))
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+ if (__glibc_unlikely (n < 0))
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{
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++had_error;
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continue;
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}
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cp += n;
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- if (*firstp)
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+ if (*firstp && __libc_res_hnok (tbuf))
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{
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/* Reclaim buffer space. */
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if (h_name + h_namelen == buffer)
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--
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2.19.1.6.gb485710b
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