From: Aditya Pakki <pakki001@xxxxxxx> [ 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@xxxxxxx> Link: https://lore.kernel.org/r/20191215153409.21696-1-pakki001@xxxxxxx Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- 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 7fbc8314f626..d6467cbf5c4f 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); -- 2.20.1
