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: Corentin Labbe <clabbe@baylibre.com>,
linux-sunxi@googlegroups.com, linux-crypto@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v2 1/7] crypto: sun4i-ss: linearize buffers content must be kept
Date: Sun, 20 Sep 2020 18:37:12 +0000 [thread overview]
Message-ID: <1600627038-40000-2-git-send-email-clabbe@baylibre.com> (raw)
In-Reply-To: <1600627038-40000-1-git-send-email-clabbe@baylibre.com>
When running the non-optimized cipher function, SS produce partial random
output.
This is due to linearize buffers being reseted after each loop.
Fixes: 8d3bcb9900ca ("crypto: sun4i-ss - reduce stack usage")
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
---
drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c
index b72de8939497..b92d175b5d2a 100644
--- a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c
+++ b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c
@@ -163,6 +163,8 @@ static int sun4i_ss_cipher_poll(struct skcipher_request *areq)
unsigned int todo;
struct sg_mapping_iter mi, mo;
unsigned int oi, oo; /* offset for in and out */
+ char buf[4 * SS_RX_MAX];/* buffer for linearize SG src */
+ char bufo[4 * SS_TX_MAX]; /* buffer for linearize SG dst */
unsigned int ob = 0; /* offset in buf */
unsigned int obo = 0; /* offset in bufo*/
unsigned int obl = 0; /* length of data in bufo */
@@ -233,8 +235,6 @@ static int sun4i_ss_cipher_poll(struct skcipher_request *areq)
while (oleft) {
if (ileft) {
- char buf[4 * SS_RX_MAX];/* buffer for linearize SG src */
-
/*
* todo is the number of consecutive 4byte word that we
* can read from current SG
@@ -295,8 +295,6 @@ static int sun4i_ss_cipher_poll(struct skcipher_request *areq)
oo = 0;
}
} else {
- char bufo[4 * SS_TX_MAX]; /* buffer for linearize SG dst */
-
/*
* read obl bytes in bufo, we read at maximum for
* emptying the device
--
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 ` Corentin Labbe [this message]
2020-09-25 7:30 ` [PATCH v2 1/7] crypto: sun4i-ss: linearize buffers content must be kept Herbert Xu
2020-09-20 18:37 ` [PATCH v2 2/7] crypto: sun4i-ss: checking sg length is not sufficient Corentin Labbe
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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