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net80211: fix panic for DWDS vaps

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Since r248069, TX IC lock must obtained before calling ieee80211_encap()
and/or ieee80211_parent_xmitpkt().

Tested with: Intel 3945BG.
This commit is contained in:
Andriy Voskoboinyk 2016-03-26 08:59:56 +00:00
parent e64c374375
commit 9b56252e4d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=297287
1 changed files with 3 additions and 0 deletions
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3
sys/net80211/ieee80211_wds.c
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@ -288,9 +288,11 @@ ieee80211_dwds_mcast(struct ieee80211vap *vap0, struct mbuf *m)
/*
* Encapsulate the packet in prep for transmission.
*/
IEEE80211_TX_LOCK(ic);
mcopy = ieee80211_encap(vap, ni, mcopy);
if (mcopy == NULL) {
/* NB: stat+msg handled in ieee80211_encap */
IEEE80211_TX_UNLOCK(ic);
ieee80211_free_node(ni);
continue;
}
@ -298,6 +300,7 @@ ieee80211_dwds_mcast(struct ieee80211vap *vap0, struct mbuf *m)
mcopy->m_pkthdr.rcvif = (void *) ni;
err = ieee80211_parent_xmitpkt(ic, mcopy);
IEEE80211_TX_UNLOCK(ic);
if (!err) {
if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);