From: YueHaibing yuehaibing@huawei.com
stable inclusion from stable-5.10.74 commit 977aee58142a19ccf9ef8fe56f1430e2ef99931f bugzilla: 182986 https://gitee.com/openeuler/kernel/issues/I4I3MG
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit a6555f844549cd190eb060daef595f94d3de1582 ]
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 Link: https://lore.kernel.org/r/20210827144230.39944-1-yuehaibing@huawei.com Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Chen Jun chenjun102@huawei.com Reviewed-by: Weilong Chen chenweilong@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com
Signed-off-by: Chen Jun chenjun102@huawei.com --- net/mac80211/rx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 38b5695c2a0c..b7979c0bffd0 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -4064,7 +4064,8 @@ 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;