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| author | Christian Lamparter <chunkeey@googlemail.com> | 2012-09-08 01:28:42 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2012-09-11 21:13:54 +0200 |
| commit | 390fd9d6c223980190adf44af5c7ba0662ff61e3 (patch) | |
| tree | 0e716e352e2138e628a992fcae89167b6c2ee25a /drivers/net/wireless/p54 | |
| parent | drivers/net/wireless/ath/ath9k/ar9003_mac.c: removes unnecessary semicolon (diff) | |
| download | linux-390fd9d6c223980190adf44af5c7ba0662ff61e3.tar.xz linux-390fd9d6c223980190adf44af5c7ba0662ff61e3.zip | |
p54: fix off-by-one null pointer bug in p54_tx_80211
This patch fixes a regression which was introduced in:
"mac80211: move TX station pointer and restructure TX"
IP: p54_tx_80211+0x21/0x513 [p54common]
Oops: 0000 [#1] SMP
Modules linked in: p54usb p54common [...]
Pid: 13394, comm: hostapd 3.6.0-rc4-wl+
RIP: 0010:p54_tx_80211+0x21/0x513
RSP: 0018:... EFLAGS: 00010292
[...]
Process hostapd
Stack:
[...]
Call Trace:
p54_bss_info_changed+0x204/0x21e [p54common]
ieee80211_del_station+0x16/0x32 [mac80211]
ieee80211_start_ap+0x10f/0x157 [mac80211]
nl80211_start_ap+0x315/0x361 [cfg80211]
p54_tx_80211 function is called as part of the
beacon update. The caller p54_bss_info_changed
has to supply a valid tx control struct, or
the control->sta will lead to a null pointer
dereference.
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/p54')
| -rw-r--r-- | drivers/net/wireless/p54/main.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/wireless/p54/main.c b/drivers/net/wireless/p54/main.c index 5e91ad06dd5d..2969d5321ca6 100644 --- a/drivers/net/wireless/p54/main.c +++ b/drivers/net/wireless/p54/main.c @@ -139,6 +139,7 @@ static int p54_beacon_format_ie_tim(struct sk_buff *skb) static int p54_beacon_update(struct p54_common *priv, struct ieee80211_vif *vif) { + struct ieee80211_tx_control control = { }; struct sk_buff *beacon; int ret; @@ -158,7 +159,7 @@ static int p54_beacon_update(struct p54_common *priv, * to cancel the old beacon template by hand, instead the firmware * will release the previous one through the feedback mechanism. */ - p54_tx_80211(priv->hw, NULL, beacon); + p54_tx_80211(priv->hw, &control, beacon); priv->tsf_high32 = 0; priv->tsf_low32 = 0; |