linux-kernel - [PATCH 3.16 61/87] cfg80211: fix memory leak of wiphy device name

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Date:   Wed, 02 Oct 2019 20:06:51 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        syzbot+7fddca22578bc67c3fe4@...kaller.appspotmail.com,
        "Johannes Berg" <johannes.berg@...el.com>,
        "Eric Biggers" <ebiggers@...gle.com>
Subject: [PATCH 3.16 61/87] cfg80211: fix memory leak of wiphy device name

3.16.75-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Eric Biggers <ebiggers@...gle.com>

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@...kaller.appspotmail.com
Fixes: 1f87f7d3a3b4 ("cfg80211: add rfkill support")
Signed-off-by: Eric Biggers <ebiggers@...gle.com>
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 net/wireless/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -386,7 +386,7 @@ struct wiphy *wiphy_new(const struct cfg
 				   &rdev->rfkill_ops, rdev);
 
 	if (!rdev->rfkill) {
-		kfree(rdev);
+		wiphy_free(&rdev->wiphy);
 		return NULL;
 	}