linux-kernel - [PATCH] genalloc: Check result of devres

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Date:	Wed, 21 Jan 2015 13:45:41 +0100
From:	Jan Kara <jack@...e.cz>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, Jan Kara <jack@...e.cz>
Subject: [PATCH] genalloc: Check result of devres_alloc()

devm_gen_pool_create() calls devres_alloc() and dereferences its result
without checking whether devres_alloc() succeeded. Check for error and
bail out if it happened.

Coverity-id: 1016493
Signed-off-by: Jan Kara <jack@...e.cz>
---
 lib/genalloc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/genalloc.c b/lib/genalloc.c
index 2e65d206b01c..094f8bee021f 100644
--- a/lib/genalloc.c
+++ b/lib/genalloc.c
@@ -587,6 +587,8 @@ struct gen_pool *devm_gen_pool_create(struct device *dev, int min_alloc_order,
 	struct gen_pool **ptr, *pool;
 
 	ptr = devres_alloc(devm_gen_pool_release, sizeof(*ptr), GFP_KERNEL);
+	if (!ptr)
+		return NULL;
 
 	pool = gen_pool_create(min_alloc_order, nid);
 	if (pool) {
-- 
2.1.2

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