From: Matthias Brugger <[email protected]> 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 <[email protected]> Signed-off-by: Matthias Brugger <[email protected]> --- 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
