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

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commit ca4da5dd1f upstream.

__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>
Cc: Moritz Mühlenhoff <jmm@inutil.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

...

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Colin Ian King 2015-07-27 15:23:43 +01:00 • committed by Luis Henriques

parent 373f2d629b

commit 9bc34abfec

1 changed files with 5 additions and 3 deletions

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security/keys/keyring.c

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