diff options
Diffstat (limited to 'drivers/crypto/caam/caampkc.c')
| -rw-r--r-- | drivers/crypto/caam/caampkc.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/crypto/caam/caampkc.c b/drivers/crypto/caam/caampkc.c index e05d975da582..e00a4701b950 100644 --- a/drivers/crypto/caam/caampkc.c +++ b/drivers/crypto/caam/caampkc.c @@ -29,6 +29,12 @@ /* buffer filled with zeros, used for padding */ static u8 *zero_buffer; +/* + * variable used to avoid double free of resources in case + * algorithm registration was unsuccessful + */ +static bool init_done; + static void rsa_io_unmap(struct device *dev, struct rsa_edesc *edesc, struct akcipher_request *req) { @@ -1076,6 +1082,7 @@ int caam_pkc_init(struct device *ctrldev) struct caam_drv_private *priv = dev_get_drvdata(ctrldev); u32 pk_inst; int err; + init_done = false; /* Determine public key hardware accelerator presence. */ if (priv->era < 10) @@ -1100,6 +1107,7 @@ int caam_pkc_init(struct device *ctrldev) dev_warn(ctrldev, "%s alg registration failed\n", caam_rsa.base.cra_driver_name); } else { + init_done = true; dev_info(ctrldev, "caam pkc algorithms registered in /proc/crypto\n"); } @@ -1108,6 +1116,9 @@ int caam_pkc_init(struct device *ctrldev) void caam_pkc_exit(void) { + if (!init_done) + return; + kfree(zero_buffer); crypto_unregister_akcipher(&caam_rsa); } |