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path: root/net/dns_resolver/dns_key.c
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Diffstat (limited to 'net/dns_resolver/dns_key.c')
-rw-r--r--net/dns_resolver/dns_key.c20
1 files changed, 17 insertions, 3 deletions
diff --git a/net/dns_resolver/dns_key.c b/net/dns_resolver/dns_key.c
index 739435a6af39..cfa7a5e1c5c9 100644
--- a/net/dns_resolver/dns_key.c
+++ b/net/dns_resolver/dns_key.c
@@ -67,8 +67,9 @@ dns_resolver_instantiate(struct key *key, const void *_data, size_t datalen)
size_t result_len = 0;
const char *data = _data, *end, *opt;
- kenter("%%%d,%s,'%s',%zu",
- key->serial, key->description, data, datalen);
+ kenter("%%%d,%s,'%*.*s',%zu",
+ key->serial, key->description,
+ (int)datalen, (int)datalen, data, datalen);
if (datalen <= 1 || !data || data[datalen - 1] != '\0')
return -EINVAL;
@@ -217,6 +218,19 @@ static void dns_resolver_describe(const struct key *key, struct seq_file *m)
seq_printf(m, ": %u", key->datalen);
}
+/*
+ * read the DNS data
+ * - the key's semaphore is read-locked
+ */
+static long dns_resolver_read(const struct key *key,
+ char __user *buffer, size_t buflen)
+{
+ if (key->type_data.x[0])
+ return key->type_data.x[0];
+
+ return user_read(key, buffer, buflen);
+}
+
struct key_type key_type_dns_resolver = {
.name = "dns_resolver",
.instantiate = dns_resolver_instantiate,
@@ -224,7 +238,7 @@ struct key_type key_type_dns_resolver = {
.revoke = user_revoke,
.destroy = user_destroy,
.describe = dns_resolver_describe,
- .read = user_read,
+ .read = dns_resolver_read,
};
static int __init init_dns_resolver(void)