USB: chaoskey read offset bug

Rng reads in chaoskey driver could return the same data under
the certain conditions.

Signed-off-by: Alexander Inyukhin <[email protected]>
Cc: stable <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Alexander Inyukhin 2015-09-26 15:24:21 +03:00 • committed by Greg Kroah-Hartman
commit 1d5c47f555

View file

@ -472,7 +472,7 @@ static int chaoskey_rng_read(struct hwrng *rng, void *data,
if (this_time > max)
this_time = max;
memcpy(data, dev->buf, this_time);
memcpy(data, dev->buf + dev->used, this_time);
dev->used += this_time;