From 1d6d167c2efcfe9539d9cffb1a1be9c92e39c2c0 Mon Sep 17 00:00:00 2001 From: Mimi Zohar Date: Thu, 7 Jan 2016 07:46:36 -0500 Subject: KEYS: refcount bug fix 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 Signed-off-by: Mimi Zohar Acked-by: David Howells --- security/keys/key.c | 3 +-- security/keys/keyctl.c | 17 +++++++---------- 2 files changed, 8 insertions(+), 12 deletions(-) (limited to 'security') diff --git a/security/keys/key.c b/security/keys/key.c index 09ef276..07a8731 100644 --- a/security/keys/key.c +++ b/security/keys/key.c @@ -430,8 +430,7 @@ static int __key_instantiate_and_link(struct key *key, /* 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); } diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c index e83ec6b..8f9f323 100644 --- a/security/keys/keyctl.c +++ b/security/keys/keyctl.c @@ -381,12 +381,11 @@ 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: @@ -432,12 +431,11 @@ long keyctl_invalidate_key(key_serial_t id) 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: @@ -1352,12 +1350,11 @@ long keyctl_set_timeout(key_serial_t id, unsigned timeout) 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: -- cgit v1.1