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| author | Andreas Schwab <schwab@redhat.com> | 2009-11-10 07:36:50 -0800 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2009-11-10 07:36:50 -0800 |
| commit | 51e4196f16a2d98377e3c481a44e133369dc7669 (patch) | |
| tree | e2d83a34e0bbe6f47dfe733f6062b6508e4d6868 /resolv/nss_dns/dns-host.c | |
| parent | 6515a01fc1d35d329886d5a45435537ee9115bc4 (diff) | |
| download | glibc-51e4196f16a2d98377e3c481a44e133369dc7669.tar.gz glibc-51e4196f16a2d98377e3c481a44e133369dc7669.tar.xz glibc-51e4196f16a2d98377e3c481a44e133369dc7669.zip | |
Handle running out of buffer space with IPv6 mapping enabled.
With big DNS answers like the one you get for goodtimesdot.com you can get a truncated address list if IPv6 mapping is enabled. Instead tell the caller to resize the buffer.
Diffstat (limited to 'resolv/nss_dns/dns-host.c')
| -rw-r--r-- | resolv/nss_dns/dns-host.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/resolv/nss_dns/dns-host.c b/resolv/nss_dns/dns-host.c index 62e67e8b01..818a40a898 100644 --- a/resolv/nss_dns/dns-host.c +++ b/resolv/nss_dns/dns-host.c @@ -878,7 +878,8 @@ getanswer_r (const querybuf *answer, int anslen, const char *qname, int qtype, } bp += n; linebuflen -= n; - map_v4v6_hostent (result, &bp, &linebuflen); + if (map_v4v6_hostent (result, &bp, &linebuflen)) + goto too_small; } *h_errnop = NETDB_SUCCESS; return NSS_STATUS_SUCCESS; @@ -953,7 +954,8 @@ getanswer_r (const querybuf *answer, int anslen, const char *qname, int qtype, } if (have_to_map) - map_v4v6_hostent (result, &bp, &linebuflen); + if (map_v4v6_hostent (result, &bp, &linebuflen)) + goto too_small; *h_errnop = NETDB_SUCCESS; return NSS_STATUS_SUCCESS; } |