From: Corentin Labbe <clabbe@baylibre.com>
To: arnd@arndb.de, davem@davemloft.net, herbert@gondor.apana.org.au,
mripard@kernel.org, wens@csie.org
Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org,
linux-sunxi@googlegroups.com,
Corentin Labbe <clabbe@baylibre.com>,
linux-arm-kernel@lists.infradead.org,
linux-crypto@vger.kernel.org
Subject: [PATCH v2 2/7] crypto: sun4i-ss: checking sg length is not sufficient
Date: Sun, 20 Sep 2020 18:37:13 +0000 [thread overview]
Message-ID: <1600627038-40000-3-git-send-email-clabbe@baylibre.com> (raw)
In-Reply-To: <1600627038-40000-1-git-send-email-clabbe@baylibre.com>
The optimized cipher function need length multiple of 4 bytes.
But it get sometimes odd length.
This is due to SG data could be stored with an offset.
So the fix is to check also if the offset is aligned with 4 bytes.
Fixes: 6298e948215f2 ("crypto: sunxi-ss - Add Allwinner Security System crypto accelerator")
Cc: <stable@vger.kernel.org>
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
---
drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c
index b92d175b5d2a..2614640231dc 100644
--- a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c
+++ b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c
@@ -188,12 +188,12 @@ static int sun4i_ss_cipher_poll(struct skcipher_request *areq)
* we can use the SS optimized function
*/
while (in_sg && no_chunk == 1) {
- if (in_sg->length % 4)
+ if (in_sg->length % 4 || !IS_ALIGNED(in_sg->offset, sizeof(u32)))
no_chunk = 0;
in_sg = sg_next(in_sg);
}
while (out_sg && no_chunk == 1) {
- if (out_sg->length % 4)
+ if (out_sg->length % 4 || !IS_ALIGNED(out_sg->offset, sizeof(u32)))
no_chunk = 0;
out_sg = sg_next(out_sg);
}
--
2.26.2
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next prev parent reply other threads:[~2020-09-20 18:39 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-20 18:37 [PATCH v2 0/7] crypto: sun4i-ss: prevent always fallback for ciphers Corentin Labbe
2020-09-20 18:37 ` [PATCH v2 1/7] crypto: sun4i-ss: linearize buffers content must be kept Corentin Labbe
2020-09-25 7:30 ` Herbert Xu
2020-09-20 18:37 ` Corentin Labbe [this message]
2020-09-20 18:37 ` [PATCH v2 3/7] crypto: sun4i-ss: IV register does not work on A10 and A13 Corentin Labbe
2020-09-20 18:37 ` [PATCH v2 4/7] crypto: sun4i-ss: handle BigEndian for cipher Corentin Labbe
2020-09-23 13:33 ` kernel test robot
2020-09-23 14:00 ` Arnd Bergmann
2020-09-23 18:06 ` LABBE Corentin
2020-09-23 18:59 ` Arnd Bergmann
2020-09-20 18:37 ` [PATCH v2 5/7] crypto: sun4i-ss: initialize need_fallback Corentin Labbe
2020-09-20 18:37 ` [PATCH v2 6/7] crypto: sun4i-ss: enabled stats via debugfs Corentin Labbe
2020-09-25 7:36 ` Herbert Xu
2020-09-20 18:37 ` [PATCH v2 7/7] crypto: sun4i-ss: add SPDX header and remove blank lines Corentin Labbe
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