From: Corentin Labbe <clabbe@baylibre.com>
To: herbert@gondor.apana.org.au, jernej.skrabec@gmail.com,
samuel@sholland.org, wens@csie.org
Cc: linux-arm-kernel@lists.infradead.org,
linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-sunxi@lists.linux.dev, Corentin Labbe <clabbe@baylibre.com>
Subject: [PATCH v2 19/19] crypto: sun8i-ce: do not fallback if cryptlen is less than sg length
Date: Mon, 2 May 2022 20:19:29 +0000 [thread overview]
Message-ID: <20220502201929.843194-20-clabbe@baylibre.com> (raw)
In-Reply-To: <20220502201929.843194-1-clabbe@baylibre.com>
The sg length could be more than remaining data on it.
So check the length requirement against the minimum between those two
values.
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
---
drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c
index 315a62e424d6..74b4e910a38d 100644
--- a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c
+++ b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c
@@ -27,6 +27,7 @@ static int sun8i_ce_cipher_need_fallback(struct skcipher_request *areq)
struct scatterlist *sg;
struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
struct sun8i_ce_alg_template *algt;
+ unsigned int todo, len;
algt = container_of(alg, struct sun8i_ce_alg_template, alg.skcipher);
@@ -51,28 +52,35 @@ static int sun8i_ce_cipher_need_fallback(struct skcipher_request *areq)
return true;
}
+ len = areq->cryptlen;
sg = areq->src;
while (sg) {
if (!IS_ALIGNED(sg->offset, sizeof(u32))) {
algt->stat_fb_srcali++;
return true;
}
- if (sg->length % 4) {
+ todo = min(len, sg->length);
+ if (todo % 4) {
algt->stat_fb_srclen++;
return true;
}
+ len -= todo;
sg = sg_next(sg);
}
+
+ len = areq->cryptlen;
sg = areq->dst;
while (sg) {
if (!IS_ALIGNED(sg->offset, sizeof(u32))) {
algt->stat_fb_dstali++;
return true;
}
- if (sg->length % 4) {
+ todo = min(len, sg->length);
+ if (todo % 4) {
algt->stat_fb_dstlen++;
return true;
}
+ len -= todo;
sg = sg_next(sg);
}
return false;
--
2.35.1
next prev parent reply other threads:[~2022-05-02 20:22 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-02 20:19 [PATCH v2 00/19] crypto: allwinner: lots of fixes Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 01/19] crypto: sun8i-ce: Fix minor style issue Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 02/19] crypto: sun8i-ce: do not allocate memory when handling requests Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 03/19] crypto: sun4i-ss: do not allocate backup IV on requests Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 04/19] crypto: sun8i-ss: rework handling of IV Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 05/19] crypto: sun8i-ss: handle zero sized sg Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 06/19] crypto: sun8i-ss: remove redundant test Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 07/19] crypto: sun8i-ss: test error before assigning Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 08/19] crypto: sun8i-ss: use sg_nents_for_len Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 09/19] crypto: sun8i-ss: do not allocate memory when handling hash requests Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 10/19] crypto: sun8i-ss: do not zeroize all pad Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 11/19] crypto: sun8i-ss: handle requests if last block is not modulo 64 Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 12/19] crypto: sun8i-ss: rework debugging Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 13/19] crypto: sun8i-ss: Add function for handling hash padding Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 14/19] crypto: sun8i-ss: add hmac(sha1) Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 15/19] crypto: sun8i-ss: do not fallback if cryptlen is less than sg length Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 16/19] crypto: sun8i-ce: Add function for handling hash padding Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 17/19] crypto: sun8i-ce: use sg_nents_for_len Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 18/19] crypto: sun8i-ce: rework debugging Corentin Labbe
2022-05-02 20:19 ` Corentin Labbe [this message]
2022-05-13 9:34 ` [PATCH v2 00/19] crypto: allwinner: lots of fixes Herbert Xu
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