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Herbert Xu authored
[CRYPTO] api: Fix potential race in crypto_remove_spawn [ Upstream commit: 38cb2419 ] As it is crypto_remove_spawn may try to unregister an instance which is yet to be registered. This patch fixes this by checking whether the instance has been registered before attempting to remove it. It also removes a bogus cra_destroy check in crypto_register_instance as 1) it's outside the mutex; 2) we have a check in __crypto_register_alg already. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Cc: David Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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