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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-01-12 01:51:44 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-01-12 01:51:44 +0100 |
| commit | 3ded91041a762423bd49bb932ae2e36b65c6ae4b (patch) | |
| tree | bc44c929b80788b34ee3b37d4c991ec54145fc8d | |
| parent | 2d30bb0b3889adf09b342722b2ce596c0763bc93 (diff) | |
| download | linux-3ded91041a762423bd49bb932ae2e36b65c6ae4b.tar.gz linux-3ded91041a762423bd49bb932ae2e36b65c6ae4b.tar.bz2 linux-3ded91041a762423bd49bb932ae2e36b65c6ae4b.zip | |
driver core: Avoid NULL pointer dereferences in device_is_bound()
If device_is_bound() is called on a device that's not been registered
yet, it will attepmt to dereference dev->p which is NULL, so avoid
that by checking dev->p in there against NULL.
Fixes: 6b9cb42752da "device core: add device_is_bound()"
Reported-and-tested-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/base/dd.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/base/dd.c b/drivers/base/dd.c index 049942176b00..c4da2df62e02 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -234,7 +234,7 @@ late_initcall(deferred_probe_initcall); */ bool device_is_bound(struct device *dev) { - return klist_node_attached(&dev->p->knode_driver); + return dev->p && klist_node_attached(&dev->p->knode_driver); } static void driver_bound(struct device *dev) |