diff options
| author | Felix Fietkau <nbd@openwrt.org> | 2009-01-26 14:36:39 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2009-01-26 14:36:39 +0000 |
| commit | 172dbe47b6675f1551547ae11601920b0f5a96b2 (patch) | |
| tree | 57a5c54d536d43a8b951303958afda0ec98cc192 | |
| parent | ff21a7a7fada987cf928604a010116197dca4587 (diff) | |
| download | upstream-172dbe47b6675f1551547ae11601920b0f5a96b2.tar.gz upstream-172dbe47b6675f1551547ae11601920b0f5a96b2.tar.bz2 upstream-172dbe47b6675f1551547ae11601920b0f5a96b2.zip | |
madwifi: fix a potential race condition in the wds ap station interface setup/teardown
SVN-Revision: 14202
| -rw-r--r-- | package/madwifi/patches/370-wdsvap.patch | 28 |
1 files changed, 15 insertions, 13 deletions
diff --git a/package/madwifi/patches/370-wdsvap.patch b/package/madwifi/patches/370-wdsvap.patch index d1f255d6c7..f72e22ffe9 100644 --- a/package/madwifi/patches/370-wdsvap.patch +++ b/package/madwifi/patches/370-wdsvap.patch @@ -903,7 +903,7 @@ } /* This is overridden by ath_node_alloc in ath/if_ath.c, and so -@@ -1134,6 +1145,62 @@ ieee80211_alloc_node(struct ieee80211vap +@@ -1134,6 +1145,65 @@ ieee80211_alloc_node(struct ieee80211vap return ni; } @@ -957,6 +957,9 @@ + if (ni->ni_subif) + return; + ++ if (!ni->ni_table) ++ return; ++ + ieee80211_ref_node(ni); + ni->ni_subif = ni->ni_vap; + IEEE80211_INIT_WORK(&ni->ni_create, ieee80211_wds_do_addif); @@ -966,7 +969,7 @@ /* Add wds address to the node table */ int #ifdef IEEE80211_DEBUG_REFCNT -@@ -1553,22 +1620,39 @@ ieee80211_find_rxnode(struct ieee80211co +@@ -1553,22 +1623,39 @@ ieee80211_find_rxnode(struct ieee80211co ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL) struct ieee80211_node_table *nt; struct ieee80211_node *ni; @@ -1015,7 +1018,7 @@ #endif IEEE80211_NODE_TABLE_UNLOCK_IRQ(nt); -@@ -1596,9 +1680,19 @@ ieee80211_find_txnode_debug(struct ieee8 +@@ -1596,9 +1683,19 @@ ieee80211_find_txnode_debug(struct ieee8 ieee80211_find_txnode(struct ieee80211vap *vap, const u_int8_t *mac) #endif { @@ -1035,7 +1038,7 @@ /* * The destination address should be in the node table * unless we are operating in station mode or this is a -@@ -1669,6 +1763,11 @@ ieee80211_free_node(struct ieee80211_nod +@@ -1669,6 +1766,11 @@ ieee80211_free_node(struct ieee80211_nod { struct ieee80211vap *vap = ni->ni_vap; @@ -1047,7 +1050,7 @@ atomic_dec(&ni->ni_ic->ic_node_counter); node_print_message(IEEE80211_MSG_NODE|IEEE80211_MSG_NODE_REF, 1 /* show counter */, -@@ -1781,22 +1880,6 @@ restart: +@@ -1781,22 +1883,6 @@ restart: jiffies > ni->ni_rxfragstamp + HZ) { ieee80211_dev_kfree_skb(&ni->ni_rxfrag); } @@ -1070,7 +1073,7 @@ ni->ni_inact--; if (ni->ni_associd != 0 || isadhoc) { struct ieee80211vap *vap = ni->ni_vap; -@@ -2263,6 +2346,36 @@ ieee80211_node_leave_11g(struct ieee8021 +@@ -2263,6 +2349,35 @@ ieee80211_node_leave_11g(struct ieee8021 } } @@ -1081,15 +1084,14 @@ + struct ieee80211vap *vap; + struct ieee80211com *ic; + ++ /* wait for full initialization before we start the teardown ++ * otherwise we could leak interfaces */ ++ while (ni->ni_subif == ni->ni_vap) ++ schedule(); ++ + rtnl_lock(); + vap = ni->ni_subif; + -+ /* if addif is waiting for the timer to fire, cancel! */ -+ if (vap == ni->ni_vap) { -+ ni->ni_subif = NULL; -+ goto done; -+ } -+ + if (!vap) + goto done; + @@ -1107,7 +1109,7 @@ /* * Handle bookkeeping for a station/neighbor leaving * the bss when operating in ap or adhoc modes. -@@ -2279,6 +2392,12 @@ ieee80211_node_leave(struct ieee80211_no +@@ -2279,6 +2394,12 @@ ieee80211_node_leave(struct ieee80211_no ni, "station with aid %d leaves (refcnt %u)", IEEE80211_NODE_AID(ni), atomic_read(&ni->ni_refcnt)); |