K 10
svn:author
V 4
avos
K 8
svn:date
V 27
2019-01-21T00:53:38.569835Z
K 7
svn:log
V 317
urtw(4): add length checks in Rx path.

- Check if buffer can contain Rx descriptor before accessing it.
- Verify upper / lower bounds for frame length.
- Do not pass too short frames into ieee80211_find_rxnode().

While here:
- Move cleanup to the function end.
- Reuse IEEE80211_IS_DATA() macro.

MFC after:	1 week

END