This is a note to let you know that I've just added the patch titled
crypto: inside-secure - fix hash when length is a multiple of a block
to the 4.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
crypto-inside-secure-fix-hash-when-length-is-a-multiple-of-a-block.patch
and it can be found in the queue-4.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 809778e02cd45d0625439fee67688f655627bb3c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Antoine=20T=C3=A9nart?= <antoine.tenart@xxxxxxxxxxxxxxxxxx>
Date: Tue, 26 Dec 2017 17:21:17 +0100
Subject: crypto: inside-secure - fix hash when length is a multiple of a block
From: Antoine Tenart <antoine.tenart@xxxxxxxxxxxxxxxxxx>
commit 809778e02cd45d0625439fee67688f655627bb3c upstream.
This patch fixes the hash support in the SafeXcel driver when the update
size is a multiple of a block size, and when a final call is made just
after with a size of 0. In such cases the driver should cache the last
block from the update to avoid handling 0 length data on the final call
(that's a hardware limitation).
Fixes: 1b44c5a60c13 ("crypto: inside-secure - add SafeXcel EIP197 crypto engine driver")
Signed-off-by: Antoine Tenart <antoine.tenart@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/crypto/inside-secure/safexcel_hash.c | 34 +++++++++++++++++++--------
1 file changed, 24 insertions(+), 10 deletions(-)
--- a/drivers/crypto/inside-secure/safexcel_hash.c
+++ b/drivers/crypto/inside-secure/safexcel_hash.c
@@ -186,17 +186,31 @@ static int safexcel_ahash_send_req(struc
else
cache_len = queued - areq->nbytes;
- /*
- * If this is not the last request and the queued data does not fit
- * into full blocks, cache it for the next send() call.
- */
- extra = queued & (crypto_ahash_blocksize(ahash) - 1);
- if (!req->last_req && extra) {
- sg_pcopy_to_buffer(areq->src, sg_nents(areq->src),
- req->cache_next, extra, areq->nbytes - extra);
+ if (!req->last_req) {
+ /* If this is not the last request and the queued data does not
+ * fit into full blocks, cache it for the next send() call.
+ */
+ extra = queued & (crypto_ahash_blocksize(ahash) - 1);
+ if (!extra)
+ /* If this is not the last request and the queued data
+ * is a multiple of a block, cache the last one for now.
+ */
+ extra = queued - crypto_ahash_blocksize(ahash);
- queued -= extra;
- len -= extra;
+ if (extra) {
+ sg_pcopy_to_buffer(areq->src, sg_nents(areq->src),
+ req->cache_next, extra,
+ areq->nbytes - extra);
+
+ queued -= extra;
+ len -= extra;
+
+ if (!queued) {
+ *commands = 0;
+ *results = 0;
+ return 0;
+ }
+ }
}
spin_lock_bh(&priv->ring[ring].egress_lock);
Patches currently in stable-queue which might be from antoine.tenart@xxxxxxxxxxxxxxxxxx are
queue-4.15/crypto-inside-secure-avoid-unmapping-dma-memory-that-was-not-mapped.patch
queue-4.15/crypto-inside-secure-fix-hash-when-length-is-a-multiple-of-a-block.patch