tree a60fb097820f80434fe81c8bdc154ac8f6435f20
parent d24c1c1977d80dcedf4e469be62f71644bf3383e
author Gilad Ben-Yossef <gilad@benyossef.com> 1495114164 +0300
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1497445555 +0200

crypto: drbg - wait for crypto op not signal safe

commit a5dfefb1c3f3db81662556393fd9283511e08430 upstream.

drbg_kcapi_sym_ctr() was using wait_for_completion_interruptible() to
wait for completion of async crypto op but if a signal occurs it
may return before DMA ops of HW crypto provider finish, thus
corrupting the output buffer.

Resolve this by using wait_for_completion() instead.

Reported-by: Eric Biggers <ebiggers3@gmail.com>
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>