6.13-stable review patch. If anyone has any objections, please let me know.
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From: Akhil R akhilrajeev@nvidia.com
[ Upstream commit f80a2e2e77bedd0aa645a60f89b4f581c70accda ]
The intermediate results for HMAC is stored in the allocated keyslot by the hardware. Dynamic allocation of keyslot during an operation is hence not possible. As the number of keyslots are limited in the hardware, fallback to the HMAC software implementation if keyslots are not available
Fixes: 0880bb3b00c8 ("crypto: tegra - Add Tegra Security Engine driver") Signed-off-by: Akhil R akhilrajeev@nvidia.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/crypto/tegra/tegra-se-hash.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/crypto/tegra/tegra-se-hash.c b/drivers/crypto/tegra/tegra-se-hash.c index 8bed13552ab9e..65a50f29bd7e6 100644 --- a/drivers/crypto/tegra/tegra-se-hash.c +++ b/drivers/crypto/tegra/tegra-se-hash.c @@ -632,13 +632,18 @@ static int tegra_hmac_setkey(struct crypto_ahash *tfm, const u8 *key, unsigned int keylen) { struct tegra_sha_ctx *ctx = crypto_ahash_ctx(tfm); + int ret;
if (aes_check_keylen(keylen)) return tegra_hmac_fallback_setkey(ctx, key, keylen);
+ ret = tegra_key_submit(ctx->se, key, keylen, ctx->alg, &ctx->key_id); + if (ret) + return tegra_hmac_fallback_setkey(ctx, key, keylen); + ctx->fallback = false;
- return tegra_key_submit(ctx->se, key, keylen, ctx->alg, &ctx->key_id); + return 0; }
static int tegra_sha_init(struct ahash_request *req)