Patch "mac80211_hwsim: Fix memory leak in hwsim_new_radio_nl()" has been added to the 4.14-stable tree

[<gregkh@xxxxxxxxxxxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    mac80211_hwsim: Fix memory leak in hwsim_new_radio_nl()

to the 4.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mac80211_hwsim-fix-memory-leak-in-hwsim_new_radio_nl.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From foo@baz Tue Dec 12 10:32:42 CET 2017
From: Ben Hutchings <ben.hutchings@xxxxxxxxxxxxxxx>
Date: Fri, 10 Nov 2017 18:48:50 +0000
Subject: mac80211_hwsim: Fix memory leak in hwsim_new_radio_nl()

From: Ben Hutchings <ben.hutchings@xxxxxxxxxxxxxxx>


[ Upstream commit 67bd52386125ce1159c0581cbcd2740addf33cd4 ]

hwsim_new_radio_nl() now copies the name attribute in order to add a
null-terminator.  mac80211_hwsim_new_radio() (indirectly) copies it
again into the net_device structure, so the first copy is not used or
freed later.  Free the first copy before returning.

Fixes: ff4dd73dd2b4 ("mac80211_hwsim: check HWSIM_ATTR_RADIO_NAME length")
Signed-off-by: Ben Hutchings <ben.hutchings@xxxxxxxxxxxxxxx>
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/net/wireless/mac80211_hwsim.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -3108,6 +3108,7 @@ static int hwsim_new_radio_nl(struct sk_
 {
 	struct hwsim_new_radio_params param = { 0 };
 	const char *hwname = NULL;
+	int ret;
 
 	param.reg_strict = info->attrs[HWSIM_ATTR_REG_STRICT_REG];
 	param.p2p_device = info->attrs[HWSIM_ATTR_SUPPORT_P2P_DEVICE];
@@ -3147,7 +3148,9 @@ static int hwsim_new_radio_nl(struct sk_
 		param.regd = hwsim_world_regdom_custom[idx];
 	}
 
-	return mac80211_hwsim_new_radio(info, &param);
+	ret = mac80211_hwsim_new_radio(info, &param);
+	kfree(hwname);
+	return ret;
 }
 
 static int hwsim_del_radio_nl(struct sk_buff *msg, struct genl_info *info)


Patches currently in stable-queue which might be from ben.hutchings@xxxxxxxxxxxxxxx are

queue-4.14/mac80211_hwsim-fix-memory-leak-in-hwsim_new_radio_nl.patch