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[3.13.y-ckt,stable] Patch "crypto: omap-aes - Fix support for unequal lengths" has been added to staging queue

Message ID 1432752866-14680-1-git-send-email-kamal@canonical.com
State New
Headers show

Commit Message

Kamal Mostafa May 27, 2015, 6:54 p.m. UTC 
This is a note to let you know that I have just added a patch titled

    crypto: omap-aes - Fix support for unequal lengths

to the linux-3.13.y-queue branch of the 3.13.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.13.y-queue

This patch is scheduled to be released in version 3.13.11-ckt21.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.13.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

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From 4b6e84d6e5b507d21630bd914d5db4ca4e114dc3 Mon Sep 17 00:00:00 2001
From: "Vutla, Lokesh" <lokeshvutla@ti.com>
Date: Tue, 31 Mar 2015 09:52:25 +0530
Subject: crypto: omap-aes - Fix support for unequal lengths

commit 6d7e7e02a044025237b6f62a20521170b794537f upstream.

For cases where total length of an input SGs is not same as
length of the input data for encryption, omap-aes driver
crashes. This happens in the case when IPsec is trying to use
omap-aes driver.

To avoid this, we copy all the pages from the input SG list
into a contiguous buffer and prepare a single element SG list
for this buffer with length as the total bytes to crypt, which is
similar thing that is done in case of unaligned lengths.

Fixes: 6242332ff2f3 ("crypto: omap-aes - Add support for cases of unaligned lengths")
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 drivers/crypto/omap-aes.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

--
1.9.1
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Patch

diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c
index a9ccbf1..97ba5bd 100644
--- a/drivers/crypto/omap-aes.c
+++ b/drivers/crypto/omap-aes.c
@@ -554,15 +554,23 @@  static int omap_aes_crypt_dma_stop(struct omap_aes_dev *dd)
 	return err;
 }

-static int omap_aes_check_aligned(struct scatterlist *sg)
+static int omap_aes_check_aligned(struct scatterlist *sg, int total)
 {
+	int len = 0;
+
 	while (sg) {
 		if (!IS_ALIGNED(sg->offset, 4))
 			return -1;
 		if (!IS_ALIGNED(sg->length, AES_BLOCK_SIZE))
 			return -1;
+
+		len += sg->length;
 		sg = sg_next(sg);
 	}
+
+	if (len != total)
+		return -1;
+
 	return 0;
 }

@@ -633,8 +641,8 @@  static int omap_aes_handle_queue(struct omap_aes_dev *dd,
 	dd->in_sg = req->src;
 	dd->out_sg = req->dst;

-	if (omap_aes_check_aligned(dd->in_sg) ||
-	    omap_aes_check_aligned(dd->out_sg)) {
+	if (omap_aes_check_aligned(dd->in_sg, dd->total) ||
+	    omap_aes_check_aligned(dd->out_sg, dd->total)) {
 		if (omap_aes_copy_sgs(dd))
 			pr_err("Failed to copy SGs for unaligned cases\n");
 		dd->sgs_copied = 1;