4.15-stable review patch. If anyone has any objections, please let me know.
From: Gilad Ben-Yossef <gi...@benyossef.com>
commit 46df8824982e4fb0198776078d4a8c3e2d531464 upstream.
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")
Signed-off-by: Gilad Ben-Yossef <gi...@benyossef.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
drivers/staging/ccree/ssi_cipher.c | 1 +
1 file changed, 1 insertion(+)
@@ -908,6 +908,7 @@ static int ssi_ablkcipher_decrypt(struct
(req->nbytes - ivsize), ivsize, 0);
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, (void *)req, DRV_CRYPTO_DIRECTION_DECRYPT);