Merge branch 'next-queue' into next

2 files changed, 8 insertions, 0 deletions

diff --git a/Documentation/networking/dns_resolver.txt b/Documentation/networking/dns_resolver.txt
index 7f531ad83285..d86adcdae420 100644
--- a/Documentation/networking/dns_resolver.txt
+++ b/Documentation/networking/dns_resolver.txt
@@ -102,6 +102,10 @@ implemented in the module can be called after doing:
      If _expiry is non-NULL, the expiry time (TTL) of the result will be
      returned also.
 
+The kernel maintains an internal keyring in which it caches looked up keys.
+This can be cleared by any process that has the CAP_SYS_ADMIN capability by
+the use of KEYCTL_KEYRING_CLEAR on the keyring ID.
+
 
 ===============================
 READING DNS KEYS FROM USERSPACE
diff --git a/Documentation/security/keys.txt b/Documentation/security/keys.txt
index 4d75931d2d79..713ec232c562 100644
--- a/Documentation/security/keys.txt
+++ b/Documentation/security/keys.txt
@@ -554,6 +554,10 @@ The keyctl syscall functions are:
      process must have write permission on the keyring, and it must be a
      keyring (or else error ENOTDIR will result).
 
+     This function can also be used to clear special kernel keyrings if they
+     are appropriately marked if the user has CAP_SYS_ADMIN capability.  The
+     DNS resolver cache keyring is an example of this.
+
 
  (*) Link a key into a keyring: