From: Mike Galbraith <[email protected]>
Fix a reference counting bug exposed by commit
725522b5453dd680412f2b6463a988e4fd148757. If driver.mod_name exists, we
take a reference in module_add_driver(), and never release it. Undo that
reference in module_remove_driver().
Signed-off-by: Mike Galbraith <[email protected]>
Cc: Kay Sievers <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
kernel/module.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/kernel/module.c b/kernel/module.c
index 8c25b1a..1ecf081 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2425,6 +2425,12 @@ void module_remove_driver(struct device_driver *drv)
kfree(driver_name);
}
}
+ /*
+ * Undo the additional reference we added in module_add_driver()
+ * via kset_find_obj()
+ */
+ if (drv->mod_name)
+ kobject_put(&drv->kobj);
}
EXPORT_SYMBOL(module_remove_driver);
#endif
--
1.5.0.1
-
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