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 Cc: stable@vger.kernel.org --- security/keys/trusted-keys/trusted_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/security/keys/trusted-keys/trusted_core.c b/security/keys/trusted-keys/trusted_core.c index d5c891d8d353..8c14e04e2112 100644 --- a/security/keys/trusted-keys/trusted_core.c +++ b/security/keys/trusted-keys/trusted_core.c @@ -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);