[PATCH 4.19 84/90] cfg80211: fix memory leak of wiphy device name

[Greg Kroah-Hartman]

From: Eric Biggers <ebiggers@xxxxxxxxxx>

commit 4f488fbca2a86cc7714a128952eead92cac279ab upstream.

In wiphy_new_nm(), if an error occurs after dev_set_name() and
device_initialize() have already been called, it's necessary to call
put_device() (via wiphy_free()) to avoid a memory leak.

Reported-by: syzbot+7fddca22578bc67c3fe4@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 1f87f7d3a3b4 ("cfg80211: add rfkill support")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 net/wireless/core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -498,7 +498,7 @@ use_default_name:
 				   &rdev->rfkill_ops, rdev);
 
 	if (!rdev->rfkill) {
-		kfree(rdev);
+		wiphy_free(&rdev->wiphy);
 		return NULL;
 	}