linux-kernel - [PATCH 5.8 254/255] dma-pool: Fix an uninitialized variable bug in atomic_pool

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Date:   Tue,  1 Sep 2020 17:11:50 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Christoph Hellwig <hch@....de>
Subject: [PATCH 5.8 254/255] dma-pool: Fix an uninitialized variable bug in atomic_pool_expand()

From: Dan Carpenter <dan.carpenter@...cle.com>

commit 892fc9f6835ecf075efac20789b012c5c9997fcc upstream.

The "page" pointer can be used with out being initialized.

Fixes: d7e673ec2c8e ("dma-pool: Only allocate from CMA when in same memory zone")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Christoph Hellwig <hch@....de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 kernel/dma/pool.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/kernel/dma/pool.c
+++ b/kernel/dma/pool.c
@@ -84,7 +84,7 @@ static int atomic_pool_expand(struct gen
 			      gfp_t gfp)
 {
 	unsigned int order;
-	struct page *page;
+	struct page *page = NULL;
 	void *addr;
 	int ret = -ENOMEM;