[4.2.y-ckt stable] Patch "crypto: sha1-mb - use corrcet pointer while completing jobs" has been added to the 4.2.y-ckt tree

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    crypto: sha1-mb - use corrcet pointer while completing jobs

to the linux-4.2.y-queue branch of the 4.2.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-4.2.y-queue

This patch is scheduled to be released in version 4.2.8-ckt9.

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

For more information about the 4.2.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

---8<------------------------------------------------------------

>From 113854fbf56bb948d6d8f7c4277fc2dc7bf8e6db Mon Sep 17 00:00:00 2001
From: Xiaodong Liu <xiaodong.liu at intel.com>
Date: Tue, 12 Apr 2016 09:45:51 +0000
Subject: crypto: sha1-mb - use corrcet pointer while completing jobs

commit 0851561d9c965df086ef8a53f981f5f95a57c2c8 upstream.

In sha_complete_job, incorrect mcryptd_hash_request_ctx pointer is used
when check and complete other jobs. If the memory of first completed req
is freed, while still completing other jobs in the func, kernel will
crash since NULL pointer is assigned to RIP.

Signed-off-by: Xiaodong Liu <xiaodong.liu at intel.com>
Acked-by: Tim Chen <tim.c.chen at linux.intel.com>
Signed-off-by: Herbert Xu <herbert at gondor.apana.org.au>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 arch/x86/crypto/sha-mb/sha1_mb.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/crypto/sha-mb/sha1_mb.c b/arch/x86/crypto/sha-mb/sha1_mb.c
index a841e97..8381c09d 100644
--- a/arch/x86/crypto/sha-mb/sha1_mb.c
+++ b/arch/x86/crypto/sha-mb/sha1_mb.c
@@ -453,10 +453,10 @@ static int sha_complete_job(struct mcryptd_hash_request_ctx *rctx,

 			req = cast_mcryptd_ctx_to_req(req_ctx);
 			if (irqs_disabled())
-				rctx->complete(&req->base, ret);
+				req_ctx->complete(&req->base, ret);
 			else {
 				local_bh_disable();
-				rctx->complete(&req->base, ret);
+				req_ctx->complete(&req->base, ret);
 				local_bh_enable();
 			}
 		}
--
2.7.4