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From: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
To: Andrey Ryabinin <ryabinin.a.a@gmail.com>,
	Alexander Potapenko <glider@google.com>,
	Dmitry Vyukov <dvyukov@google.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Andrey Konovalov <adech.fo@gmail.com>
Cc: kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org,
	"Gustavo A. R. Silva" <gustavo@embeddedor.com>
Subject: [PATCH] lib/test_kasan.c: Fix memory leak in kmalloc_oob_krealloc_more()
Date: Thu, 23 Jan 2020 10:01:15 -0600
Message-ID: <20200123160115.GA4202@embeddedor> (raw)

In case memory resources for _ptr2_ were allocated, release them
before return.

Notice that in case _ptr1_ happens to be NULL, krealloc() behaves
exactly like kmalloc().

Addresses-Coverity-ID: 1490594 ("Resource leak")
Fixes: 3f15801cdc23 ("lib: add kasan test module")
Cc: stable@vger.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
---
 lib/test_kasan.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/test_kasan.c b/lib/test_kasan.c
index 328d33beae36..3872d250ed2c 100644
--- a/lib/test_kasan.c
+++ b/lib/test_kasan.c
@@ -158,6 +158,7 @@ static noinline void __init kmalloc_oob_krealloc_more(void)
 	if (!ptr1 || !ptr2) {
 		pr_err("Allocation failed\n");
 		kfree(ptr1);
+		kfree(ptr2);
 		return;
 	}
 
-- 
2.25.0


             reply index

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-23 16:01 Gustavo A. R. Silva [this message]
2020-01-23 16:02 ` Dmitry Vyukov

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