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| author | Aditya Pakki <pakki001@umn.edu> | 2019-12-15 09:34:08 -0600 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2019-12-16 10:15:49 +0100 |
| commit | 6fc232db9e8cd50b9b83534de9cd91ace711b2d7 (patch) | |
| tree | bd8372886f47dbe86bd837f5ad794d2d545544f2 /net/rfkill | |
| parent | 911bde0fe5ccd7e55760be9d6dcc67a8850fcc12 (diff) | |
| download | linux-6fc232db9e8cd50b9b83534de9cd91ace711b2d7.tar.gz linux-6fc232db9e8cd50b9b83534de9cd91ace711b2d7.tar.bz2 linux-6fc232db9e8cd50b9b83534de9cd91ace711b2d7.zip | |
rfkill: Fix incorrect check to avoid NULL pointer dereference
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>
Diffstat (limited to 'net/rfkill')
| -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 461d75274fb3..971c73c7d34c 100644 --- a/net/rfkill/core.c +++ b/net/rfkill/core.c @@ -1002,10 +1002,13 @@ 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); |