4.19-stable review patch. If anyone has any objections, please let me know.
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From: Ovidiu Panait ovidiu.panait@windriver.com
[ Upstream commit afffcf3db98b9495114b79d5381f8cc3f69476fb ]
update() calls should not modify the result buffer, so add an additional check for "rctx->last" to make sure that only the final hash value is copied into the buffer.
Fixes the following selftest failure: alg: ahash: sahara-sha256 update() used result buffer on test vector 3, cfg="init+update+final aligned buffer"
Fixes: 5a2bb93f5992 ("crypto: sahara - add support for SHA1/256") Signed-off-by: Ovidiu Panait ovidiu.panait@windriver.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/crypto/sahara.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/crypto/sahara.c b/drivers/crypto/sahara.c index 5bd2c34a9ceb..5232e6a849cc 100644 --- a/drivers/crypto/sahara.c +++ b/drivers/crypto/sahara.c @@ -1035,7 +1035,7 @@ static int sahara_sha_process(struct ahash_request *req)
memcpy(rctx->context, dev->context_base, rctx->context_size);
- if (req->result) + if (req->result && rctx->last) memcpy(req->result, rctx->context, rctx->digest_size);
return 0;