Commit 5f4e6b2d authored Oct 16, 2010 by Christian Lamparter Committed by John W. Linville Oct 25, 2010

mac80211: don't sanitize invalid rates



I found this bug while poking around with a pure-gn AP.

Commit:
cfg80211/mac80211: Use more generic bitrate mask for rate control

Added some sanity checks to ensure that each tx rate index
is included in the configured mask and it would change any
rate indexes if it wasn't.

But, the current implementation doesn't take into account
that the invalid rate index "-1" has a special meaning
(= no further attempts) and it should not be "changed".

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Cc: stable@kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>

parent cae7f953

net/mac80211/rate.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -329,6 +329,9 @@ void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
		* if needed.
		*/
		for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
		/* Skip invalid rates */
		if (info->control.rates[i].idx < 0)
		break;
		/* Rate masking supports only legacy rates for now */
		if (info->control.rates[i].flags & IEEE80211_TX_RC_MCS)
		continue;

Admin message