diff options
| author | Aditya Pakki <pakki001@umn.edu> | 2019-12-15 09:34:08 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-12 12:11:57 +0100 |
| commit | c7a6c3d2c372a592c975cda98a479287ebd169d1 (patch) | |
| tree | 08a2a9f6bcb7b5d5590ff06562558ad3aa06bf1c | |
| parent | 4f5cf943699a6331949ce4cb319de3e23b787a04 (diff) | |
rfkill: Fix incorrect check to avoid NULL pointer dereference
[ 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>
| -rw-r--r-- | net/rfkill/core.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/net/rfkill/core.c b/net/rfkill/core.c index 99a2e55b01cf..e31b4288f32c 100644 --- a/net/rfkill/core.c +++ b/net/rfkill/core.c @@ -998,10 +998,13 @@ 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); |