According to RFC1035 "[...] the total length of a domain name (i.e., label octets and label length octets) is restricted to 255 octets or less."
Signed-off-by: Manuel Schölling <manuel.schoell...@gmx.de> --- net/dns_resolver/dns_query.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/dns_resolver/dns_query.c b/net/dns_resolver/dns_query.c index e7b6d53..e0fde29 100644 --- a/net/dns_resolver/dns_query.c +++ b/net/dns_resolver/dns_query.c @@ -94,7 +94,7 @@ int dns_query(const char *type, const char *name, size_t namelen, if (!namelen) namelen = strlen(name); - if (namelen < 3) + if (namelen < 3 || namelen > 255) return -EINVAL; desclen += namelen + 1; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/