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From: Luis Chamberlain <mcgrof@kernel.org>
To: akpm@linux-foundation.org
Cc: rdunlap@infradead.org, linux-kernel@vger.kernel.org,
	Luis Chamberlain <mcgrof@kernel.org>,
	stable@vger.kernel.org
Subject: [PATCH] test_kmod: fix rmmod double free
Date: Fri, 23 Nov 2018 21:05:00 -0800
Message-ID: <20181124050500.5257-1-mcgrof@kernel.org> (raw)

We double free the misc device string twice on rmmod, fix this.
Without this we cannot remove the module without crashing.

Cc: <stable@vger.kernel.org>      # for v4.12 and up
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
---
 lib/test_kmod.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/lib/test_kmod.c b/lib/test_kmod.c
index e3ddd836491f..d82d022111e0 100644
--- a/lib/test_kmod.c
+++ b/lib/test_kmod.c
@@ -1214,7 +1214,6 @@ void unregister_test_dev_kmod(struct kmod_test_device *test_dev)
 
 	dev_info(test_dev->dev, "removing interface\n");
 	misc_deregister(&test_dev->misc_dev);
-	kfree(&test_dev->misc_dev.name);
 
 	mutex_unlock(&test_dev->config_mutex);
 	mutex_unlock(&test_dev->trigger_mutex);
-- 
2.19.1


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