crypto: cbc - Ensure statesize is zero
The cbc template should not be applied on stream ciphers, especially ones that have internal state. Enforce this by checking the state size when the instance is created. Reported-by: <syzbot+050eeedd6c285d8c42f2@syzkaller.appspotmail.com> Fixes: 47309ea1 ("crypto: arc4 - Add internal state") Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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ccb88e95
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