From: Colin Ian King <colin.king@canonical.com>
Date: Mon, 27 Jul 2015 14:23:43 +0000 (+0100)
Subject: KEYS: ensure we free the assoc array edit if edit is valid
X-Git-Tag: omap-for-v4.3/fixes-merge-window~173^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ca4da5dd1f99fe9c59f1709fb43e818b18ad20e0;p=pandora-kernel.git

KEYS: ensure we free the assoc array edit if edit is valid

__key_link_end is not freeing the associated array edit structure
and this leads to a 512 byte memory leak each time an identical
existing key is added with add_key().

The reason the add_key() system call returns okay is that
key_create_or_update() calls __key_link_begin() before checking to see
whether it can update a key directly rather than adding/replacing - which
it turns out it can.  Thus __key_link() is not called through
__key_instantiate_and_link() and __key_link_end() must cancel the edit.

CVE-2015-1333

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
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