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Declare the gen_aes_key with __cleanup(aes_zeroize_ctx) to avoid that its contents could be leaking via the stack when the function returns. And since it is only required in one branch of the if-statement there, move it to that block, too. Signed-off-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>