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| author | nectar <nectar@FreeBSD.org> | 2002-09-15 16:51:09 +0000 |
|---|---|---|
| committer | nectar <nectar@FreeBSD.org> | 2002-09-15 16:51:09 +0000 |
| commit | b44001f0c35c71357de671925af59585fe44a345 (patch) | |
| tree | b148cf252878680c37bb7a53070e4d454eed0300 /lib/libc/net/getaddrinfo.c | |
| parent | 486bc9dab8aab95468a5910f1ad064ed33582577 (diff) | |
| download | FreeBSD-src-b44001f0c35c71357de671925af59585fe44a345.zip FreeBSD-src-b44001f0c35c71357de671925af59585fe44a345.tar.gz | |
Check for truncation in calls to res_send/res_query/res_search.
Fail when it is detected.
Diffstat (limited to 'lib/libc/net/getaddrinfo.c')
| -rw-r--r-- | lib/libc/net/getaddrinfo.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/libc/net/getaddrinfo.c b/lib/libc/net/getaddrinfo.c index 0f724f9..ccd5d6e 100644 --- a/lib/libc/net/getaddrinfo.c +++ b/lib/libc/net/getaddrinfo.c @@ -1829,7 +1829,9 @@ res_queryN(name, target) } #endif - if (n < 0 || hp->rcode != NOERROR || ntohs(hp->ancount) == 0) { + if (n < 0 || n > anslen) + hp->rcode = FORMERR; /* XXX not very informative */ + if (hp->rcode != NOERROR || ntohs(hp->ancount) == 0) { rcode = hp->rcode; /* record most recent error */ #ifdef DEBUG if (_res.options & RES_DEBUG) |
