Commit d240b079 authored by Thorsten Blum's avatar Thorsten Blum Committed by Herbert Xu
Browse files

crypto: atmel-sha204a - Fix OOM ->tfm_count leak 



If memory allocation fails, decrement ->tfm_count to avoid blocking
future reads.

Cc: stable@vger.kernel.org
Fixes: da001fb6 ("crypto: atmel-i2c - add support for SHA204A random number generator")
Signed-off-by: default avatarThorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 889b0e27

drivers/crypto/atmel-sha204a.c

+3 −2
Original line number Diff line number Diff line
@@ -52,9 +52,10 @@ static int atmel_sha204a_rng_read_nonblocking(struct hwrng *rng, void *data, 
		rng->priv = 0;

	} else {

		work_data = kmalloc_obj(*work_data, GFP_ATOMIC);

		if (!work_data)

		if (!work_data) {

			atomic_dec(&i2c_priv->tfm_count);

			return -ENOMEM;



		}

		work_data->ctx = i2c_priv;

		work_data->client = i2c_priv->client;