tree 6f9965790045cc0b73c43033aae859cab79128a2
parent 5dcbf480473f6c3f06ad2426b7517038a2a18911
author Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com> 1329712531 +0530
committer John W. Linville <linville@tuxdriver.com> 1329853526 -0500

mac80211: zero initialize count field in ieee80211_tx_rate

rate control algorithms concludes the rate as invalid
with rate[i].idx < -1 , while they do also check for rate[i].count is
non-zero. it would be safer to zero initialize the 'count' field.
recently we had a ath9k rate control crash where the ath9k rate control
in ath_tx_status assumed to check only for rate[i].count being non-zero
in one instance and ended up in using invalid rate index for
'connection monitoring NULL func frames' which eventually lead to the crash.
thanks to Pavel Roskin for fixing it and finding the root cause.
https://bugzilla.redhat.com/show_bug.cgi?id=768639

Cc: stable@vger.kernel.org
Cc: Pavel Roskin <proski@gnu.org>
Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>