4.9-stable review patch. If anyone has any objections, please let me know.
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From: Ben Hutchings ben.hutchings@codethink.co.uk
[ 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@codethink.co.uk Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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 @@ -3047,6 +3047,7 @@ 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]; @@ -3086,7 +3087,9 @@ static int hwsim_new_radio_nl(struct sk_ param.regd = hwsim_world_regdom_custom[idx]; }
- return mac80211_hwsim_new_radio(info, ¶m); + ret = mac80211_hwsim_new_radio(info, ¶m); + kfree(hwname); + return ret; }
static int hwsim_del_radio_nl(struct sk_buff *msg, struct genl_info *info)