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nl80211: fix station_info pertid memory leak 

When dumping stations, memory allocated for station_info's
pertid member will leak if the nl80211 header cannot be added to
the sk_buff due to insufficient tail room.

I noticed this leak in the kmalloc-2048 cache.

Cc: stable@vger.kernel.org
Fixes: 8689c051a2 ("cfg80211: dynamically allocate per-tid stats for station info")
Signed-off-by: Andy Strohman <andy@uplevelsystems.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Andy Strohman 2019-05-24 23:27:29 -07:00 committed by Johannes Berg
parent a71fd9dac2
commit f77bf4863d
1 changed files with 3 additions and 1 deletions
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4
net/wireless/nl80211.c
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@ -4859,8 +4859,10 @@ static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
struct nlattr *sinfoattr, *bss_param;
hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
if (!hdr)
if (!hdr) {
cfg80211_sinfo_release_content(sinfo);
return -1;
}
if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||