lib/genalloc.c: 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@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
zaoqitouteng · Feb 14, 2015 · 310ee9e · 310ee9e
1 parent 8da53d4
commit 310ee9e
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/lib/genalloc.c b/lib/genalloc.c
@@ -586,6 +586,8 @@ 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) {