From: Aditya Pakki pakki001@umn.edu
[ Upstream commit 6fc232db9e8cd50b9b83534de9cd91ace711b2d7 ]
In rfkill_register, the struct rfkill pointer is first derefernced and then checked for NULL. This patch removes the BUG_ON and returns an error to the caller in case rfkill is NULL.
Signed-off-by: Aditya Pakki pakki001@umn.edu Link: https://lore.kernel.org/r/20191215153409.21696-1-pakki001@umn.edu Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- net/rfkill/core.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/net/rfkill/core.c b/net/rfkill/core.c index 7fbc831..d6467cb 100644 --- a/net/rfkill/core.c +++ b/net/rfkill/core.c @@ -1014,10 +1014,13 @@ static void rfkill_sync_work(struct work_struct *work) int __must_check rfkill_register(struct rfkill *rfkill) { static unsigned long rfkill_no; - struct device *dev = &rfkill->dev; + struct device *dev; int error;
- BUG_ON(!rfkill); + if (!rfkill) + return -EINVAL; + + dev = &rfkill->dev;
mutex_lock(&rfkill_global_mutex);