kernel ieee80211 off-by-two integer underflow

Integer underflow in the ieee80211rx function in net/ieee80211/ieee80211rx.c in the Linux kernel 2.6.x before 2.6.23 allows remote attackers to cause a denial of service crash via a crafted SKB length value in a runt IEEE 802.11 frame when the IEEE80211STYPEQOSDATA flag is set, aka an "off-by-two...