From: Colin Ian King <colin.king@canonical.com>
Date: Tue, 14 Apr 2015 16:51:29 +0000 (-0500)
Subject: crypto: mv_cesa - ensure backlog is initialised
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=1a92b2ba339221a4afee43adf125fcc9a41353f7;p=openwrt%2Fstaging%2Fblogic.git

crypto: mv_cesa - ensure backlog is initialised

backlog is not initialised so in the case where
cpg->eng_st != ENGINE_IDLE it is never initialised and
hence which could lead to an illegal memory dereference
in the statement:

  backlog->complete(backlog, -EINPROGRESS);

Discovered with cppcheck static analsys:
[drivers/crypto/mv_cesa.c:616]:
   (error) Uninitialized variable: backlog

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/drivers/crypto/mv_cesa.c b/drivers/crypto/mv_cesa.c
index f91f15ddee92..e63efbd840b5 100644
--- a/drivers/crypto/mv_cesa.c
+++ b/drivers/crypto/mv_cesa.c
@@ -595,7 +595,7 @@ static int queue_manag(void *data)
 	cpg->eng_st = ENGINE_IDLE;
 	do {
 		struct crypto_async_request *async_req = NULL;
-		struct crypto_async_request *backlog;
+		struct crypto_async_request *backlog = NULL;
 
 		__set_current_state(TASK_INTERRUPTIBLE);