backup_info field is only allocated for decrypt code path. The field was not nullified when not used causing a kfree in an error handling path to attempt to free random addresses as uncovered in stress testing.

Fixes: 737aed947f9b ("staging: ccree: save ciphertext for CTS IV") Cc: stable@vger.kernel.org Signed-off-by: Gilad Ben-Yossef gilad@benyossef.com --- drivers/staging/ccree/ssi_cipher.c | 1 + 1 file changed, 1 insertion(+)

diff --git a/drivers/staging/ccree/ssi_cipher.c b/drivers/staging/ccree/ssi_cipher.c index 9019615..7b484f1 100644 --- a/drivers/staging/ccree/ssi_cipher.c +++ b/drivers/staging/ccree/ssi_cipher.c @@ -907,6 +907,7 @@ static int ssi_ablkcipher_encrypt(struct ablkcipher_request *req) unsigned int ivsize = crypto_ablkcipher_ivsize(ablk_tfm);

req_ctx->is_giv = false; + req_ctx->backup_info = NULL;

return ssi_blkcipher_process(tfm, req_ctx, req->dst, req->src, req->nbytes, req->info, ivsize,