This is a note to let you know that I've just added the patch titled
KEYS: Reinstate EPERM for a key type name beginning with a '.'
KEYS: special dot prefixed keyring name bug fix
to the 3.17-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
keys-reinstate-eperm-for-a-key-type-name-beginning-with-a.patch
and it can be found in the queue-3.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 54e2c2c1a9d6cbb270b0999a38545fa9a69bee43 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@xxxxxxxxxx>
Date: Tue, 16 Sep 2014 17:29:03 +0100
Subject: KEYS: Reinstate EPERM for a key type name beginning with a '.'
From: David Howells <dhowells@xxxxxxxxxx>
commit 54e2c2c1a9d6cbb270b0999a38545fa9a69bee43 upstream.
Reinstate the generation of EPERM for a key type name beginning with a '.' in
a userspace call. Types whose name begins with a '.' are internal only.
The test was removed by:
commit a4e3b8d79a5c6d40f4a9703abf7fe3abcc6c3b8d
Author: Mimi Zohar <zohar@xxxxxxxxxxxxxxxxxx>
Date: Thu May 22 14:02:23 2014 -0400
Subject: KEYS: special dot prefixed keyring name bug fix
I think we want to keep the restriction on type name so that userspace can't
add keys of a special internal type.
Note that removal of the test causes several of the tests in the keyutils
testsuite to fail.
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
Acked-by: Vivek Goyal <vgoyal@xxxxxxxxxx>
cc: Mimi Zohar <zohar@xxxxxxxxxxxxxxxxxx>
Cc: Josh Boyer <jwboyer@xxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
security/keys/keyctl.c | 2 ++
1 file changed, 2 insertions(+)
--- a/security/keys/keyctl.c
+++ b/security/keys/keyctl.c
@@ -37,6 +37,8 @@ static int key_get_type_from_user(char *
return ret;
if (ret == 0 || ret >= len)
return -EINVAL;
+ if (type[0] == '.')
+ return -EPERM;
type[len - 1] = '\0';
return 0;
}
Patches currently in stable-queue which might be from dhowells@xxxxxxxxxx are
queue-3.17/keys-reinstate-eperm-for-a-key-type-name-beginning-with-a.patch
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