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Message-Id: <20220405070400.218521331@linuxfoundation.org>
Date: Tue, 5 Apr 2022 09:29:02 +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>,
Luis Chamberlain <mcgrof@...nel.org>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 680/913] lib/test: use after free in register_test_dev_kmod()
From: Dan Carpenter <dan.carpenter@...cle.com>
[ Upstream commit dc0ce6cc4b133f5f2beb8b47dacae13a7d283c2c ]
The "test_dev" pointer is freed but then returned to the caller.
Fixes: d9c6a72d6fa2 ("kmod: add test driver to stress test the module loader")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Luis Chamberlain <mcgrof@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
lib/test_kmod.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/lib/test_kmod.c b/lib/test_kmod.c
index ce1589391413..cb800b1d0d99 100644
--- a/lib/test_kmod.c
+++ b/lib/test_kmod.c
@@ -1149,6 +1149,7 @@ static struct kmod_test_device *register_test_dev_kmod(void)
if (ret) {
pr_err("could not register misc device: %d\n", ret);
free_test_dev_kmod(test_dev);
+ test_dev = NULL;
goto out;
}
--
2.34.1
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