tree 58aca2d17484a8dc343e6ebac1a47b14ce9c5a48
parent 2d0280070e6c3f0028ca462b59db5c0a45d36299
author Gilad Ben-Yossef <gilad@benyossef.com> 1495114165 +0300
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1497445555 +0200

crypto: gcm - wait for crypto op not signal safe

commit f3ad587070d6bd961ab942b3fd7a85d00dfc934b upstream.

crypto_gcm_setkey() 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 data buffer that is kfree'ed in this case.

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>