[PATCH 1/5] crypto: atmel-sha: fix crash when computing digest on empty message

[Cyrille Pitchen]

This patch fixes a crash which occured during the computation of the
digest of an empty message.

Indeed, when processing an empty message, the atmel_sha_handle_queue()
function was never called, hence the dd->req pointer remained
uninitialized.

Later, when the atmel_sha_final_req() function was called, it used
to crash while using this uninitialized dd->req pointer.

Hence this patch adds missing initializations of dd->req before calls of
the atmel_sha_final_req() function.

This bug prevented us from passing the tcrypt test suite on SHA algo.

Signed-off-by: Cyrille Pitchen <cyrille.pitchen at atmel.com>
---
 drivers/crypto/atmel-sha.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/crypto/atmel-sha.c b/drivers/crypto/atmel-sha.c
index 20de861aa0ea..006b2aefba30 100644
--- a/drivers/crypto/atmel-sha.c
+++ b/drivers/crypto/atmel-sha.c
@@ -939,6 +939,7 @@ static int atmel_sha_final(struct ahash_request *req)
 		if (err)
 			goto err1;
 
+		dd->req = req;
 		dd->flags |= SHA_FLAGS_BUSY;
 		err = atmel_sha_final_req(dd);
 	} else {
-- 
1.8.2.2