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CRED: Allow put_cred() to cope with a NULL groups list

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put_cred() will oops if given a NULL groups list, but that is now possible with
the existence of cred_alloc_blank(), as used in keyctl_session_to_parent().

Added in commit:

	commit ee18d64c1f
	Author: David Howells <dhowells@redhat.com>
	Date:   Wed Sep 2 09:14:21 2009 +0100
	KEYS: Add a keyctl to install a process's session keyring on its parent [try #6]

Reported-by: Marc Dionne <marc.c.dionne@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
David Howells 2009-09-14 12:45:39 +01:00 committed by James Morris
parent 4e6d0bffd3
commit 4a5d6ba191
1 changed files with 2 additions and 1 deletions
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3
kernel/cred.c
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@ -147,7 +147,8 @@ static void put_cred_rcu(struct rcu_head *rcu)
key_put(cred->thread_keyring);
key_put(cred->request_key_auth);
release_tgcred(cred);
put_group_info(cred->group_info);
if (cred->group_info)
put_group_info(cred->group_info);
free_uid(cred->user);
kmem_cache_free(cred_jar, cred);
}