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| author | Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> | 2012-08-10 11:00:24 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-09-14 10:00:19 -0700 |
| commit | 459243191d5ba70a94d74b604b91bf82bb9f0772 (patch) | |
| tree | 5921eed681f3ca11f6cb45453d52c4e4376d1fb2 | |
| parent | 4500d525ad74c4195cdaf270bcc1f96dd0fd95ed (diff) | |
| download | parrot-459243191d5ba70a94d74b604b91bf82bb9f0772.tar.gz | |
ath9k: fix decrypt_error initialization in ath_rx_tasklet()
commit e1352fde5682ab1bdd2a9e5d75c22d1fe210ef77 upstream.
ath_rx_tasklet() calls ath9k_rx_skb_preprocess() and ath9k_rx_skb_postprocess()
in a loop over the received frames. The decrypt_error flag is
initialized to false
just outside ath_rx_tasklet() loop. ath9k_rx_accept(), called by
ath9k_rx_skb_preprocess(),
only sets decrypt_error to true and never to false.
Then ath_rx_tasklet() calls ath9k_rx_skb_postprocess() and passes
decrypt_error to it.
So, after a decryption error, in ath9k_rx_skb_postprocess(), we can
have a leftover value
from another processed frame. In that case, the frame will not be marked with
RX_FLAG_DECRYPTED even if it is decrypted correctly.
When using CCMP encryption this issue can lead to connection stuck
because of CCMP
PN corruption and a waste of CPU time since mac80211 tries to decrypt an already
deciphered frame with ieee80211_aes_ccm_decrypt.
Fix the issue initializing decrypt_error flag at the begging of the
ath_rx_tasklet() loop.
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/recv.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c index a2f7ae81a414c..90b8527154e3c 100644 --- a/drivers/net/wireless/ath/ath9k/recv.c +++ b/drivers/net/wireless/ath/ath9k/recv.c @@ -1774,7 +1774,6 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp) struct ieee80211_hw *hw = sc->hw; struct ieee80211_hdr *hdr; int retval; - bool decrypt_error = false; struct ath_rx_status rs; enum ath9k_rx_qtype qtype; bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA); @@ -1796,6 +1795,7 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp) tsf_lower = tsf & 0xffffffff; do { + bool decrypt_error = false; /* If handling rx interrupt and flush is in progress => exit */ if ((sc->sc_flags & SC_OP_RXFLUSH) && (flush == 0)) break; |