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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-01-21 00:14:18 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-01-21 00:35:15 -0300
commit65690072f7f4415677c84ea10eb2d5830e22cb41 (patch)
treeb876aee88549747d5e81069f9226dcefb5e86157 /libre-testing/linux-libre-pck/CVE-2016-0728.patch
parentd6f56c9253d054faa9e19f9795bf14a423f23877 (diff)
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linux-libre-pck-4.4_gnu.pck1-1: updating version
* disable CONFIG_X86_VERBOSE_BOOTUP - FS#47402 -> https://bugs.archlinux.org/task/47402 * enable CONFIG_VGACON_SOFT_SCROLLBACK - FS#47442 -> https://bugs.archlinux.org/task/47442 * unsetting CONFIG_ACPI_REV_OVERRIDE_POSSIBLE - FS#47710 -> https://bugs.archlinux.org/task/47710 * fix sdhci broken on some boards - FS#47778 -> https://bugs.archlinux.org/task/47778 * fix kernel panics on platform modules - FS#47805 -> https://bugs.archlinux.org/task/47805 * fix CVE-2016-0728 - FS#47820 -> https://bugs.archlinux.org/task/47820
Diffstat (limited to 'libre-testing/linux-libre-pck/CVE-2016-0728.patch')
-rw-r--r--libre-testing/linux-libre-pck/CVE-2016-0728.patch78
1 files changed, 78 insertions, 0 deletions
diff --git a/libre-testing/linux-libre-pck/CVE-2016-0728.patch b/libre-testing/linux-libre-pck/CVE-2016-0728.patch
new file mode 100644
index 000000000..e915d8219
--- /dev/null
+++ b/libre-testing/linux-libre-pck/CVE-2016-0728.patch
@@ -0,0 +1,78 @@
+From 23567fd052a9abb6d67fe8e7a9ccdd9800a540f2 Mon Sep 17 00:00:00 2001
+From: Yevgeny Pats <yevgeny@perception-point.io>
+Date: Tue, 19 Jan 2016 22:09:04 +0000
+Subject: [PATCH] KEYS: Fix keyring ref leak in join_session_keyring()
+
+This fixes CVE-2016-0728.
+
+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>
+Acked-by: Don Zickus <dzickus@redhat.com>
+Acked-by: Prarit Bhargava <prarit@redhat.com>
+Acked-by: Jarod Wilson <jarod@redhat.com>
+Signed-off-by: James Morris <james.l.morris@oracle.com>
+---
+ security/keys/process_keys.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/security/keys/process_keys.c b/security/keys/process_keys.c
+index a3f85d2a..e6d50172 100644
+--- a/security/keys/process_keys.c
++++ b/security/keys/process_keys.c
+@@ -794,6 +794,7 @@ long join_session_keyring(const char *name)
+ ret = PTR_ERR(keyring);
+ goto error2;
+ } else if (keyring == new->session_keyring) {
++ key_put(keyring);
+ ret = 0;
+ goto error2;
+ }