When a TFM is unregistered, the sun4i-ss driver does not clean the key used, leaking it in memory. This patch adds this absent key cleaning.
Fixes: 6298e948215f ("crypto: sunxi-ss - Add Allwinner Security System crypto accelerator") Cc: stable@vger.kernel.org # 4.3+ Signed-off-by: Corentin Labbe clabbe.montjoie@gmail.com --- drivers/crypto/sunxi-ss/sun4i-ss-cipher.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c b/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c index fa4b1b47822e..60d99370a4ec 100644 --- a/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c +++ b/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c @@ -503,6 +503,8 @@ int sun4i_ss_cipher_init(struct crypto_tfm *tfm) void sun4i_ss_cipher_exit(struct crypto_tfm *tfm) { struct sun4i_tfm_ctx *op = crypto_tfm_ctx(tfm); + + memzero_explicit(op->key, op->keylen); crypto_free_sync_skcipher(op->fallback_tfm); }