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KEYS: trusted: Avoid calling null function trusted_key_exit

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If one loads and unloads the trusted module, trusted_key_exit can be
NULL. Call it through static_call_cond() to avoid a kernel trap.

Fixes: 5d0682be3189 ("KEYS: trusted: Add generic trusted keys framework")
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Cc: Sumit Garg <sumit.garg@linaro.org>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jarkko Sakkinen <jarkko@kernel.org>
Cc: Mimi Zohar <zohar@linux.ibm.com>
Cc: David Howells <dhowells@redhat.com>
Cc: James Morris <jmorris@namei.org>
Cc: "Serge E. Hallyn" <serge@hallyn.com>
Cc: linux-integrity@vger.kernel.org
Cc: keyrings@vger.kernel.org
Cc: linux-security-module@vger.kernel.org
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
This commit is contained in:
Dave Kleikamp 2022-01-26 14:32:43 -06:00 committed by Jarkko Sakkinen
parent 969a26446b
commit c5d1ed846e
1 changed files with 1 additions and 1 deletions
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2
security/keys/trusted-keys/trusted_core.c
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@ -351,7 +351,7 @@ static int __init init_trusted(void)
static void __exit cleanup_trusted(void)
{
static_call(trusted_key_exit)();
static_call_cond(trusted_key_exit)();
}
late_initcall(init_trusted);