| Message ID | 20210827144230.39944-1-yuehaibing@huawei.com (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | Johannes Berg |
| Headers | show |
| Series | mac80211: Drop frames from invalid MAC address in ad-hoc mode | expand |
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 2563473..e023e30 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -4053,7 +4053,8 @@ static bool ieee80211_accept_frame(struct ieee80211_rx_data *rx) if (!bssid) return false; if (ether_addr_equal(sdata->vif.addr, hdr->addr2) || - ether_addr_equal(sdata->u.ibss.bssid, hdr->addr2)) + ether_addr_equal(sdata->u.ibss.bssid, hdr->addr2) || + !is_valid_ether_addr(hdr->addr2)) return false; if (ieee80211_is_beacon(hdr->frame_control)) return true;
WARNING: CPU: 1 PID: 9 at net/mac80211/sta_info.c:554 sta_info_insert_rcu+0x121/0x12a0 Modules linked in: CPU: 1 PID: 9 Comm: kworker/u8:1 Not tainted 5.14.0-rc7+ #253 Workqueue: phy3 ieee80211_iface_work RIP: 0010:sta_info_insert_rcu+0x121/0x12a0 ... Call Trace: ieee80211_ibss_finish_sta+0xbc/0x170 ieee80211_ibss_work+0x13f/0x7d0 ieee80211_iface_work+0x37a/0x500 process_one_work+0x357/0x850 worker_thread+0x41/0x4d0 If an Ad-Hoc node receives packets with invalid source MAC address, it hits a WARN_ON in sta_info_insert_check(), this can spam the log. Signed-off-by: YueHaibing <yuehaibing@huawei.com> --- net/mac80211/rx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)