• Eneas U de Queiroz's avatar
    crypto: qce - use cryptlen when adding extra sgl · d6364b81
    Eneas U de Queiroz authored
    The qce crypto driver appends an extra entry to the dst sgl, to maintain
    private state information.
    
    When the gcm driver sends requests to the ctr skcipher, it passes the
    authentication tag after the actual crypto payload, but it must not be
    touched.
    
    Commit 1336c2221bee ("crypto: qce - save a sg table slot for result
    buf") limited the destination sgl to avoid overwriting the
    authentication tag but it assumed the tag would be in a separate sgl
    entry.
    
    This is not always the case, so it is better to limit the length of the
    destination buffer to req->cryptlen before appending the result buf.
    Signed-off-by: default avatarEneas U de Queiroz <cotequeiroz@gmail.com>
    Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
    d6364b81
dma.c 2.86 KB