diff options
Diffstat (limited to 'gnu')
| -rw-r--r-- | gnu/packages/linux.scm | 6 | ||||
| -rw-r--r-- | gnu/packages/patches/linux-libre-CVE-2016-0728.patch | 84 |
2 files changed, 88 insertions, 2 deletions
diff --git a/gnu/packages/linux.scm b/gnu/packages/linux.scm index 09014d6076..579df02c37 100644 --- a/gnu/packages/linux.scm +++ b/gnu/packages/linux.scm @@ -2,7 +2,7 @@ ;;; Copyright © 2012, 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org> ;;; Copyright © 2013, 2014, 2015 Andreas Enge <andreas@enge.fr> ;;; Copyright © 2012 Nikita Karetnikov <nikita@karetnikov.org> -;;; Copyright © 2014, 2015 Mark H Weaver <mhw@netris.org> +;;; Copyright © 2014, 2015, 2016 Mark H Weaver <mhw@netris.org> ;;; Copyright © 2015 Federico Beffa <beffa@fbengineering.ch> ;;; Copyright © 2015 Taylan Ulrich Bayırlı/Kammer <taylanbayirli@gmail.com> ;;; Copyright © 2015 Efraim Flashner <efraim@flashner.co.il> @@ -286,7 +286,9 @@ for SYSTEM, or #f if there is no configuration for SYSTEM." (uri (linux-libre-urls version)) (sha256 (base32 - "1839xsaifs7vvyblzin8jps0gqi10xmz1l9p4x0j27vmdj39jgpm")))) + "1839xsaifs7vvyblzin8jps0gqi10xmz1l9p4x0j27vmdj39jgpm")) + (patches + (list (search-patch "linux-libre-CVE-2016-0728.patch"))))) (build-system gnu-build-system) (supported-systems '("x86_64-linux" "i686-linux")) (native-inputs `(("perl" ,perl) diff --git a/gnu/packages/patches/linux-libre-CVE-2016-0728.patch b/gnu/packages/patches/linux-libre-CVE-2016-0728.patch new file mode 100644 index 0000000000..254d6c1aea --- /dev/null +++ b/gnu/packages/patches/linux-libre-CVE-2016-0728.patch @@ -0,0 +1,84 @@ +Copied from +https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/patch/?id=23567fd052a9abb6d67fe8e7a9ccdd9800a540f2 + +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: 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 a3f85d2..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; + } +-- +cgit v0.12 + |