linux-kernel - [PATCH 4.16 43/43] crypto: omap-sham

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Date:   Thu, 14 Jun 2018 16:04:47 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Bin Liu <b-liu@...com>,
        Tero Kristo <t-kristo@...com>,
        Herbert Xu <herbert@...dor.apana.org.au>
Subject: [PATCH 4.16 43/43] crypto: omap-sham - fix memleak

4.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Bin Liu <b-liu@...com>

commit 9dbc8a0328efa485a6f5b68b867f9f523a3fbeff upstream.

Fixes: 8043bb1ae03cb ("crypto: omap-sham - convert driver logic to use sgs for data xmit")

The memory pages freed in omap_sham_finish_req() were less than those
allocated in omap_sham_copy_sgs().

Cc: stable@...r.kernel.org
Signed-off-by: Bin Liu <b-liu@...com>
Acked-by: Tero Kristo <t-kristo@...com>
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/crypto/omap-sham.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/crypto/omap-sham.c
+++ b/drivers/crypto/omap-sham.c
@@ -1082,7 +1082,7 @@ static void omap_sham_finish_req(struct
 
 	if (test_bit(FLAGS_SGS_COPIED, &dd->flags))
 		free_pages((unsigned long)sg_virt(ctx->sg),
-			   get_order(ctx->sg->length));
+			   get_order(ctx->sg->length + ctx->bufcnt));
 
 	if (test_bit(FLAGS_SGS_ALLOCED, &dd->flags))
 		kfree(ctx->sg);