kernel: update kernel 4.4 to version 4.4.3

[openwrt.git] / target / linux / generic / patches-4.4 / 010-KEYS-Fix-keyring-ref-leak-in-join_session_keyring.patch

diff --git a/target/linux/generic/patches-4.4/010-KEYS-Fix-keyring-ref-leak-in-join_session_keyring.patch b/target/linux/generic/patches-4.4/010-KEYS-Fix-keyring-ref-leak-in-join_session_keyring.patch
deleted file mode 100644 (file)
index f22d8c3..0000000
--- a/target/linux/generic/patches-4.4/010-KEYS-Fix-keyring-ref-leak-in-join_session_keyring.patch
+++ /dev/null
@@ -1,70 +0,0 @@
-From 7ca88764d45c209791e8813131c1457c2e9e51e7 Mon Sep 17 00:00:00 2001
-From: Yevgeny Pats <yevgeny@perception-point.io>
-Date: Mon, 11 Jan 2016 12:05:28 +0000
-Subject: KEYS: Fix keyring ref leak in join_session_keyring()
-
-If a thread is asked to join as a session keyring the keyring that's already
-set as its session, we leak a keyring reference.
-
-This can be tested with the following program:
-
-       #include <stddef.h>
-       #include <stdio.h>
-       #include <sys/types.h>
-       #include <keyutils.h>
-
-       int main(int argc, const char *argv[])
-       {
-               int i = 0;
-               key_serial_t serial;
-
-               serial = keyctl(KEYCTL_JOIN_SESSION_KEYRING,
-                               "leaked-keyring");
-               if (serial < 0) {
-                       perror("keyctl");
-                       return -1;
-               }
-
-               if (keyctl(KEYCTL_SETPERM, serial,
-                          KEY_POS_ALL | KEY_USR_ALL) < 0) {
-                       perror("keyctl");
-                       return -1;
-               }
-
-               for (i = 0; i < 100; i++) {
-                       serial = keyctl(KEYCTL_JOIN_SESSION_KEYRING,
-                                       "leaked-keyring");
-                       if (serial < 0) {
-                               perror("keyctl");
-                               return -1;
-                       }
-               }
-
-               return 0;
-       }
-
-If, after the program has run, there something like the following line in
-/proc/keys:
-
-3f3d898f I--Q---   100 perm 3f3f0000     0     0 keyring   leaked-keyring: empty
-
-with a usage count of 100 * the number of times the program has been run,
-then the kernel is malfunctioning.  If leaked-keyring has zero usages or
-has been garbage collected, then the problem is fixed.
-
-Reported-by: Yevgeny Pats <yevgeny@perception-point.io>
-Signed-off-by: David Howells <dhowells@redhat.com>
----
- security/keys/process_keys.c | 1 +
- 1 file changed, 1 insertion(+)
-
---- a/security/keys/process_keys.c
-+++ b/security/keys/process_keys.c
-@@ -794,6 +794,7 @@ long join_session_keyring(const char *na
-               ret = PTR_ERR(keyring);
-               goto error2;
-       } else if (keyring == new->session_keyring) {
-+              key_put(keyring);
-               ret = 0;
-               goto error2;
-       }