From: Alexey Khoroshilov <khoroshilov@ispras.ru>
Date: Fri, 10 Jun 2022 18:27:15 +0000 (+0300)
Subject: crypto: sun8i-ss - fix infinite loop in sun8i_ss_setup_ivs()
X-Git-Tag: v6.6.17~6939^2~63
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d61a7b3decf7f0cf4121a7204303deefd2c7151b;p=platform%2Fkernel%2Flinux-rpi.git

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@ispras.ru>
Fixes: 359e893e8af4 ("crypto: sun8i-ss - rework handling of IV")
Acked-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Tested-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
index 5bb9501..910d675 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 @@ dma_iv_error:
 	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;
 }