request for 4.14-stable: 293edc27f8bc ("stating: ccree: revert "staging: ccree: fix leak of import() after init()"")

[Sudip Mukherjee <sudipm.mukherjee@gmail.com>]

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Hi Greg,

This was missing in 4.14-stable. Please apply to your queue.


--
Regards
Sudip

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From aea00e5caac52ffe575b3c94d6bd47703ab44b0e Mon Sep 17 00:00:00 2001
From: Gilad Ben-Yossef <gilad@benyossef.com>
Date: Sun, 7 Jan 2018 12:14:22 +0000
Subject: [PATCH] stating: ccree: revert "staging: ccree: fix leak of import() after init()"

commit 293edc27f8bc8a44978e9e95902b07b74f1c7523 upstream

This reverts commit c5f39d07860c ("staging: ccree: fix leak of import()
after init()") and commit aece09024414 ("staging: ccree: Uninitialized
return in ssi_ahash_import()").

This is the wrong solution and ends up relying on uninitialized memory,
although it was not obvious to me at the time.

Cc: stable@vger.kernel.org
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
---
 drivers/staging/ccree/ssi_hash.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/ccree/ssi_hash.c b/drivers/staging/ccree/ssi_hash.c
index e266a70a1b32..13291aeaf350 100644
--- a/drivers/staging/ccree/ssi_hash.c
+++ b/drivers/staging/ccree/ssi_hash.c
@@ -1781,7 +1781,7 @@ static int ssi_ahash_import(struct ahash_request *req, const void *in)
 	struct device *dev = &ctx->drvdata->plat_dev->dev;
 	struct ahash_req_ctx *state = ahash_request_ctx(req);
 	u32 tmp;
-	int rc = 0;
+	int rc;
 
 	memcpy(&tmp, in, sizeof(u32));
 	if (tmp != CC_EXPORT_MAGIC) {
@@ -1790,12 +1790,9 @@ static int ssi_ahash_import(struct ahash_request *req, const void *in)
 	}
 	in += sizeof(u32);
 
-	/* call init() to allocate bufs if the user hasn't */
-	if (!state->digest_buff) {
-		rc = ssi_hash_init(state, ctx);
-		if (rc)
-			goto out;
-	}
+	rc = ssi_hash_init(state, ctx);
+	if (rc)
+		goto out;
 
 	dma_sync_single_for_cpu(dev, state->digest_buff_dma_addr,
 				ctx->inter_digestsize, DMA_BIDIRECTIONAL);
-- 
2.11.0