4.20-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit db7ddeab3ce5d64c9696e70d61f45ea9909cd196 ]
There is a copy and paste bug so we set "config->test_driver" to NULL twice instead of setting "config->test_fs". Smatch complains that it leads to a double free:
lib/test_kmod.c:840 __kmod_config_init() warn: 'config->test_fs' double freed
Link: http://lkml.kernel.org/r/20190121140011.GA14283@kadam Fixes: d9c6a72d6fa2 ("kmod: add test driver to stress test the module loader") Signed-off-by: Dan Carpenter dan.carpenter@oracle.com Acked-by: Luis Chamberlain mcgrof@kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- lib/test_kmod.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/test_kmod.c b/lib/test_kmod.c index d82d022111e0..9cf77628fc91 100644 --- a/lib/test_kmod.c +++ b/lib/test_kmod.c @@ -632,7 +632,7 @@ static void __kmod_config_free(struct test_config *config) config->test_driver = NULL;
kfree_const(config->test_fs); - config->test_driver = NULL; + config->test_fs = NULL; }
static void kmod_config_free(struct kmod_test_device *test_dev)