[PATCH 4.9 29/30] crypto: omap-sham - fix memleak

[Greg Kroah-Hartman]

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

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

From: Bin Liu <b-liu@xxxxxx>

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@xxxxxxxxxxxxxxx
Signed-off-by: Bin Liu <b-liu@xxxxxx>
Acked-by: Tero Kristo <t-kristo@xxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 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
@@ -1081,7 +1081,7 @@ 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);