2.6.37-stable review patch. If anyone has any objections, please let us know.
------------------ From: Felix Fietkau <[email protected]> commit eb3e554b4b3a56386ef5214dbe0e3935a350178b upstream. Some drivers (e.g. ath9k) do not always disable beacons when they're supposed to. When an interface is changed using the change_interface op, the mode specific sdata part is in an undefined state and trying to get a beacon at this point can produce weird crashes. To fix this, add a check for ieee80211_sdata_running before using anything from the sdata. Signed-off-by: Felix Fietkau <[email protected]> Signed-off-by: John W. Linville <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- net/mac80211/tx.c | 3 +++ 1 file changed, 3 insertions(+) --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -2207,6 +2207,9 @@ struct sk_buff *ieee80211_beacon_get_tim sdata = vif_to_sdata(vif); + if (!ieee80211_sdata_running(sdata)) + goto out; + if (tim_offset) *tim_offset = 0; if (tim_length) _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
