diff options
| -rw-r--r-- | libre/linux-libre/CVE-2016-0728.patch | 78 | ||||
| -rw-r--r-- | libre/linux-libre/PKGBUILD | 7 |
2 files changed, 84 insertions, 1 deletions
diff --git a/libre/linux-libre/CVE-2016-0728.patch b/libre/linux-libre/CVE-2016-0728.patch new file mode 100644 index 000000000..e915d8219 --- /dev/null +++ b/libre/linux-libre/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; + } diff --git a/libre/linux-libre/PKGBUILD b/libre/linux-libre/PKGBUILD index 9f55ef0e4..e8ca2771c 100644 --- a/libre/linux-libre/PKGBUILD +++ b/libre/linux-libre/PKGBUILD @@ -20,7 +20,7 @@ _replacesoldmodules=() # '%' gets replaced with _kernelname _srcname=linux-${_pkgbasever%-*} _archpkgver=${_pkgver%-*} pkgver=${_pkgver//-/_} -pkgrel=2 +pkgrel=3 rcnrel=armv7-x1 arch=('i686' 'x86_64' 'armv7h') url="http://linux-libre.fsfla.org/" @@ -45,6 +45,7 @@ source=("http://linux-libre.fsfla.org/pub/linux-libre/releases/${_pkgbasever}/li # standard config files for mkinitcpio ramdisk 'linux.preset' 'change-default-console-loglevel.patch' + 'CVE-2016-0728.patch' '0001-disabling-primary-plane-in-the-noatomic-case.patch' '0001-drm-radeon-Make-the-driver-load-without-the-firmwares.patch' '0002-usb-serial-gadget-no-TTY-hangup-on-USB-disconnect-WI.patch' @@ -75,6 +76,7 @@ sha256sums=('1d280ae2730eb6c9b8c7e920cac2e8111c8db02c498db0c142860a84106cc169' 'b5e9a8200cbde221a4e75a6898b45820739a17205ec0c233fafcd0711989512f' 'f0d90e756f14533ee67afda280500511a62465b4f76adcc5effa95a40045179c' '1256b241cd477b265a3c2d64bdc19ffe3c9bbcee82ea3994c590c2c76e767d99' + '03bed5b1c6ef34a917e218a46d38cd1347c5ab5693131996113c6cad275dc4e9' 'abdd04bd6beecb7c961130a68d71e6332bd260462eeaa2f4f8e634de813dcc4d' '61370b766e0c60b407c29d2c44b3f55fc352e9049c448bc8fcddb0efc53e42fc' '3d3266bd082321dccf429cc2200d1a4d870d2031546f9f591b6dfbb698294808' @@ -136,6 +138,9 @@ prepare() { # add latest fixes from stable queue, if needed # http://git.kernel.org/?p=linux/kernel/git/stable/stable-queue.git + # fixes #47820 CVE-2016-0728.patch + patch -Np1 -i "${srcdir}/CVE-2016-0728.patch" + # set DEFAULT_CONSOLE_LOGLEVEL to 4 (same value as the 'quiet' kernel param) # remove this when a Kconfig knob is made available by upstream # (relevant patch sent upstream: https://lkml.org/lkml/2011/7/26/227) |