In the EIP93 HASH functions, the eip93_put_descriptor is called without acquiring lock. This is problematic when multiple thread execute hash operations.
Correctly acquire ring write lock on calling eip93_put_descriptor to prevent concurrent access and mess with the ring pointers.
Cc: stable@vger.kernel.org Fixes: 9739f5f93b78 ("crypto: eip93 - Add Inside Secure SafeXcel EIP-93 crypto engine support") Reported-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Christian Marangi ansuelsmth@gmail.com --- drivers/crypto/inside-secure/eip93/eip93-hash.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/crypto/inside-secure/eip93/eip93-hash.c b/drivers/crypto/inside-secure/eip93/eip93-hash.c index 5e9627467a42..df1b05ac5a57 100644 --- a/drivers/crypto/inside-secure/eip93/eip93-hash.c +++ b/drivers/crypto/inside-secure/eip93/eip93-hash.c @@ -260,7 +260,8 @@ static int eip93_send_hash_req(struct crypto_async_request *async, u8 *data, }
again: - ret = eip93_put_descriptor(eip93, &cdesc); + scoped_guard(spinlock_irqsave, &eip93->ring->write_lock) + ret = eip93_put_descriptor(eip93, &cdesc); if (ret) { usleep_range(EIP93_RING_BUSY_DELAY, EIP93_RING_BUSY_DELAY * 2);