Re: general protection fault in crypto_chacha20_crypt

[Eric Biggers]

On Wed, Nov 29, 2017 at 01:24:38AM -0800, Eric Biggers wrote:
> 
> The bug is that the skcipher_walk API doesn't set the IV for zero-length inputs,
> while some algorithms (e.g. ChaCha20) access the IV even if the input is
> zero-length.  So it was dereferencing a pointer which came from uninitialized
> stack memory.  I've sent out a fix:
> 
> "crypto: skcipher - set walk.iv for zero-length inputs"
> 

#syz fix: crypto: skcipher - set walk.iv for zero-length inputs