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| author | Mike Galbraith <efault@gmx.de> | 2007-02-21 12:45:35 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-02-23 14:52:09 -0800 |
| commit | 63ce18cfe685115ff8d341bae4c9204a79043cf0 (patch) | |
| tree | 7f37a6f9f0453b2122e490d6ef68f213d8a878a3 /kernel/module.c | |
| parent | 40cf67c5fcc513406558c01b91129280208e57bf (diff) | |
| download | linux-63ce18cfe685115ff8d341bae4c9204a79043cf0.tar.gz linux-63ce18cfe685115ff8d341bae4c9204a79043cf0.tar.bz2 linux-63ce18cfe685115ff8d341bae4c9204a79043cf0.zip | |
driver core: refcounting fix
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 <efault@gmx.de>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'kernel/module.c')
| -rw-r--r-- | kernel/module.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/module.c b/kernel/module.c index 8c25b1a04fa6..1ecf08106381 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 |