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mac80211: fix oops due to missing private data 

This was caused by patch:

"mac80211: cooperate more with network namespaces"

The version of the patch applied doesn't match Johannes' latest:

http://johannes.sipsolutions.net/patches/kernel/all/LATEST/NNN-mac80211-netns.patch

The skb->cb virtual interface data wasn't being reset for
reuse so ath9k pooped out when trying to dereference the
private rate control info from the skb.

BUG: unable to handle kernel NULL pointer dereference
RIP: 0010:[<ffffffffa0258173>] ath_tx_rc_status+0x33/0x150 [ath9k]
<-- snip etc -->

Reported-by: Davide Pesavento <davidepesa@gmail.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Luis R. Rodriguez 2009-07-24 19:57:25 -04:00 committed by John W. Linville
parent ac88b6ecdf
commit 21f5fc75de
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
net/mac80211/tx.c
View File

@ -1170,13 +1170,15 @@ static int __ieee80211_tx(struct ieee80211_local *local,
}
ret = drv_tx(local, skb);
info->control.vif = &sdata->vif;
if (WARN_ON(ret != NETDEV_TX_OK && skb->len != len)) {
dev_kfree_skb(skb);
ret = NETDEV_TX_OK;
}
if (ret != NETDEV_TX_OK)
if (ret != NETDEV_TX_OK) {
info->control.vif = &sdata->vif;
return IEEE80211_TX_AGAIN;
}
*skbp = skb = next;
ieee80211_led_tx(local, 1);
fragm = true;