From: Matthias Brugger <mbrug...@suse.com>
If we pass a driver without a name, we end up in a NULL pointer
derefernce. Check for the name before trying to register the driver.
As we don't have a driver name to point to in the error message, we dump
the call stack to make it easier to detect the buggy driver.
Reported-by: kernel test robot <l...@intel.com>
Signed-off-by: Matthias Brugger <mbrug...@suse.com>
---
drivers/base/driver.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index 57c68769e157..40fba959c140 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -149,6 +149,12 @@ int driver_register(struct device_driver *drv)
int ret;
struct device_driver *other;
+ if (!drv->name) {
+ pr_err("Driver has no name.\n");
+ dump_stack();
+ return -EINVAL;
+ }
+
if (!drv->bus->p) {
pr_err("Driver '%s' was unable to register with bus_type '%s'
because the bus was not initialized.\n",
drv->name, drv->bus->name);
--
2.26.2
