staging: usbip: fix to prevent potentially using uninitialized spinlock

The stub_probe function can be called as soon as the stub_driver is
registered. This can lead to the busid_table_lock being used before it
is initialized. Moved calling the init_busid_table function (which
initalizes this spinlock) to be called earlier in the init function to
prevent this from happening.

Signed-off-by: Bart Westgeest <bart@elbrys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/usbip/stub_main.c b/drivers/staging/usbip/stub_main.c
index 2d63178..705a9e5 100644 (file)
--- a/drivers/staging/usbip/stub_main.c
+++ b/drivers/staging/usbip/stub_main.c
@@ -246,8 +246,9 @@ static int __init usbip_host_init(void)
 {
        int ret;
 
-       stub_priv_cache = KMEM_CACHE(stub_priv, SLAB_HWCACHE_ALIGN);
+       init_busid_table();
 
+       stub_priv_cache = KMEM_CACHE(stub_priv, SLAB_HWCACHE_ALIGN);
        if (!stub_priv_cache) {
                pr_err("kmem_cache_create failed\n");
                return -ENOMEM;
@@ -266,7 +267,6 @@ static int __init usbip_host_init(void)
                goto err_create_file;
        }
 
-       init_busid_table();
        pr_info(DRIVER_DESC " v" USBIP_VERSION "\n");
        return ret;