linux-kernel - [PATCH] crypto: sun8i-ss - fix infinite loop in sun8i_ss_setup

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Message-Id: <1654885635-32290-1-git-send-email-khoroshilov@ispras.ru>
Date:   Fri, 10 Jun 2022 21:27:15 +0300
From:   Alexey Khoroshilov <khoroshilov@...ras.ru>
To:     Corentin Labbe <clabbe.montjoie@...il.com>
Cc:     Alexey Khoroshilov <khoroshilov@...ras.ru>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        linux-crypto@...r.kernel.org, linux-sunxi@...ts.linux.dev,
        linux-kernel@...r.kernel.org, ldv-project@...uxtesting.org
Subject: [PATCH] crypto: sun8i-ss - fix infinite loop in sun8i_ss_setup_ivs()

There is no i decrement in while (i >= 0) loop.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>
Fixes: 359e893e8af4 ("crypto: sun8i-ss - rework handling of IV")
---
 drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
index 5bb950182026..910d6751644c 100644
--- a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
+++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
@@ -170,6 +170,7 @@ static int sun8i_ss_setup_ivs(struct skcipher_request *areq)
 	while (i >= 0) {
 		dma_unmap_single(ss->dev, rctx->p_iv[i], ivsize, DMA_TO_DEVICE);
 		memzero_explicit(sf->iv[i], ivsize);
+		i--;
 	}
 	return err;
 }
-- 
2.7.4