crypto: starfive - Do not free stack buffer

commit d7f0164 upstream.

RSA text data uses variable length buffer allocated in software stack.
Calling kfree on it causes undefined behaviour in subsequent operations.

Cc: <[email protected]> #6.7+
Signed-off-by: Jia Jie Ho <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: jiajieho

drivers/crypto/starfive/jh7110-rsa.c

@@ -273,7 +273,6 @@ static int starfive_rsa_enc_core(struct starfive_cryp_ctx *ctx, int enc)
 
 err_rsa_crypt:
 	writel(STARFIVE_RSA_RESET, cryp->base + STARFIVE_PKA_CACR_OFFSET);
-	kfree(rctx->rsa_data);
 	return ret;
 }