This is a note to let you know that I've just added the patch titled
KEYS: refcount bug fix
to the 4.3-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-refcount-bug-fix.patch
and it can be found in the queue-4.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 1d6d167c2efcfe9539d9cffb1a1be9c92e39c2c0 Mon Sep 17 00:00:00 2001
From: Mimi Zohar <zohar@xxxxxxxxxxxxxxxxxx>
Date: Thu, 7 Jan 2016 07:46:36 -0500
Subject: KEYS: refcount bug fix
From: Mimi Zohar <zohar@xxxxxxxxxxxxxxxxxx>
commit 1d6d167c2efcfe9539d9cffb1a1be9c92e39c2c0 upstream.
This patch fixes the key_ref leak, removes the unnecessary KEY_FLAG_KEEP
test before setting the flag, and cleans up the if/then brackets style
introduced in commit:
d3600bc KEYS: prevent keys from being removed from specified keyrings
Reported-by: David Howells <dhowells@xxxxxxxxxx>
Signed-off-by: Mimi Zohar <zohar@xxxxxxxxxxxxxxxxxx>
Acked-by: David Howells <dhowells@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
security/keys/key.c | 3 +--
security/keys/keyctl.c | 17 +++++++----------
2 files changed, 8 insertions(+), 12 deletions(-)
--- a/security/keys/key.c
+++ b/security/keys/key.c
@@ -430,8 +430,7 @@ static int __key_instantiate_and_link(st
/* and link it into the destination keyring */
if (keyring) {
- if (test_bit(KEY_FLAG_KEEP, &keyring->flags))
- set_bit(KEY_FLAG_KEEP, &key->flags);
+ set_bit(KEY_FLAG_KEEP, &key->flags);
__key_link(key, _edit);
}
--- a/security/keys/keyctl.c
+++ b/security/keys/keyctl.c
@@ -387,12 +387,11 @@ long keyctl_revoke_key(key_serial_t id)
}
key = key_ref_to_ptr(key_ref);
+ ret = 0;
if (test_bit(KEY_FLAG_KEEP, &key->flags))
- return -EPERM;
- else {
+ ret = -EPERM;
+ else
key_revoke(key);
- ret = 0;
- }
key_ref_put(key_ref);
error:
@@ -438,12 +437,11 @@ long keyctl_invalidate_key(key_serial_t
invalidate:
key = key_ref_to_ptr(key_ref);
+ ret = 0;
if (test_bit(KEY_FLAG_KEEP, &key->flags))
ret = -EPERM;
- else {
+ else
key_invalidate(key);
- ret = 0;
- }
error_put:
key_ref_put(key_ref);
error:
@@ -1358,12 +1356,11 @@ long keyctl_set_timeout(key_serial_t id,
okay:
key = key_ref_to_ptr(key_ref);
+ ret = 0;
if (test_bit(KEY_FLAG_KEEP, &key->flags))
ret = -EPERM;
- else {
+ else
key_set_timeout(key, timeout);
- ret = 0;
- }
key_put(key);
error:
Patches currently in stable-queue which might be from zohar@xxxxxxxxxxxxxxxxxx are
queue-4.3/tpm-tpm_tis-fix-tpm_tis-acpi-detection-issue-with-tpm-2.0.patch
queue-4.3/keys-refcount-bug-fix.patch
queue-4.3/keys-prevent-keys-from-being-removed-from-specified-keyrings.patch
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