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| author | Schspa Shi <schspa@gmail.com> | 2022-05-13 19:24:44 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-05-19 19:28:42 +0200 |
| commit | 310862e574001a97ad02272bac0fd13f75f42a27 (patch) | |
| tree | 1c2c74d10a8273d9c654441c8919dbc8287a1d7b /drivers/base | |
| parent | 185b29c6151cf3a5c387ca5904c51c6af3292a0c (diff) | |
| download | linux-310862e574001a97ad02272bac0fd13f75f42a27.tar.bz2 | |
driver: base: fix UAF when driver_attach failed
When driver_attach(drv); failed, the driver_private will be freed.
But it has been added to the bus, which caused a UAF.
To fix it, we need to delete it from the bus when failed.
Fixes: 190888ac01d0 ("driver core: fix possible missing of device probe")
Signed-off-by: Schspa Shi <schspa@gmail.com>
Link: https://lore.kernel.org/r/20220513112444.45112-1-schspa@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/bus.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/base/bus.c b/drivers/base/bus.c index 97936ec49bde..7ca47e5b3c1f 100644 --- a/drivers/base/bus.c +++ b/drivers/base/bus.c @@ -617,7 +617,7 @@ int bus_add_driver(struct device_driver *drv) if (drv->bus->p->drivers_autoprobe) { error = driver_attach(drv); if (error) - goto out_unregister; + goto out_del_list; } module_add_driver(drv->owner, drv); @@ -644,6 +644,8 @@ int bus_add_driver(struct device_driver *drv) return 0; +out_del_list: + klist_del(&priv->knode_bus); out_unregister: kobject_put(&priv->kobj); /* drv->p is freed in driver_release() */ |