diff options
| 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/getnetbydns.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/getnetbydns.c')
| -rw-r--r-- | lib/libc/net/getnetbydns.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/lib/libc/net/getnetbydns.c b/lib/libc/net/getnetbydns.c index 369bf2b..fd771f2 100644 --- a/lib/libc/net/getnetbydns.c +++ b/lib/libc/net/getnetbydns.c @@ -263,7 +263,13 @@ _dns_getnetbyaddr(void *rval, void *cb_data, va_list ap) if (anslen < 0) { #ifdef DEBUG if (_res.options & RES_DEBUG) - printf("res_query failed\n"); + printf("res_search failed\n"); +#endif + return NS_UNAVAIL; + } else if (anslen > sizeof(buf)) { +#ifdef DEBUG + if (_res.options & RES_DEBUG) + printf("res_search static buffer too small"); #endif return NS_UNAVAIL; } @@ -303,7 +309,13 @@ _dns_getnetbyname(void *rval, void *cb_data, va_list ap) if (anslen < 0) { #ifdef DEBUG if (_res.options & RES_DEBUG) - printf("res_query failed\n"); + printf("res_search failed\n"); +#endif + return NS_UNAVAIL; + } else if (anslen > sizeof(buf)) { +#ifdef DEBUG + if (_res.options & RES_DEBUG) + printf("res_search static buffer too small"); #endif return NS_UNAVAIL; } |
