linux-kernel - [PATCH -next 3/4] crypto: starfive: Do not free stack buffer

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Date: Mon, 29 Apr 2024 14:06:39 +0800
From: Jia Jie Ho <jiajie.ho@...rfivetech.com>
To: Herbert Xu <herbert@...dor.apana.org.au>,
	"David S . Miller" <davem@...emloft.net>,
	linux-crypto@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH -next 3/4] crypto: starfive: Do not free stack buffer

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

Signed-off-by: Jia Jie Ho <jiajie.ho@...rfivetech.com>
---
 drivers/crypto/starfive/jh7110-rsa.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/crypto/starfive/jh7110-rsa.c b/drivers/crypto/starfive/jh7110-rsa.c
index 4d7eb3d1e764..33093ba4b13a 100644
--- a/drivers/crypto/starfive/jh7110-rsa.c
+++ b/drivers/crypto/starfive/jh7110-rsa.c
@@ -276,7 +276,6 @@ 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;
 }
 
-- 
2.40.1