From d41a9fcfb7f9ee36e4a4aaf5e7996bca6be1e7a9 Mon Sep 17 00:00:00 2001 From: Giovanni Cabiddu Date: Mon, 8 Jun 2026 16:04:20 +0100 Subject: [PATCH] crypto: qat - clear AES key schedule from stack qat_alg_xts_reverse_key() expands the forward XTS AES key on the stack. That schedule contains key material and can remain in the stack frame. Clear the temporary crypto_aes_ctx with memzero_explicit() after the copy. Fixes: 5106dfeaeabe ("crypto: qat - add AES-XTS support for QAT GEN4 devices") Signed-off-by: Giovanni Cabiddu Reviewed-by: Ahsan Atta Signed-off-by: Herbert Xu --- drivers/crypto/intel/qat/qat_common/qat_algs.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/crypto/intel/qat/qat_common/qat_algs.c b/drivers/crypto/intel/qat/qat_common/qat_algs.c index 7f638a62e3ad..91663805d9e6 100644 --- a/drivers/crypto/intel/qat/qat_common/qat_algs.c +++ b/drivers/crypto/intel/qat/qat_common/qat_algs.c @@ -405,6 +405,7 @@ static void qat_alg_xts_reverse_key(const u8 *key_forward, unsigned int keylen, memcpy(key_reverse + AES_BLOCK_SIZE, key - AES_BLOCK_SIZE, AES_BLOCK_SIZE); } + memzero_explicit(&aes_expanded, sizeof(aes_expanded)); } static void qat_alg_skcipher_init_dec(struct qat_alg_skcipher_ctx *ctx,