From: Pavel Roskin Date: Sat, 4 Apr 2009 00:10:26 +0000 (-0400) Subject: ath9k: fix access to a freed skb in ath_rx_tasklet() X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=853da11b94e674445e93660f47a5f0aeeea09623;p=linux-beck.git ath9k: fix access to a freed skb in ath_rx_tasklet() Signed-off-by: Pavel Roskin Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/ath9k/recv.c b/drivers/net/wireless/ath9k/recv.c index 71cb18d6757d..dd1f30156740 100644 --- a/drivers/net/wireless/ath9k/recv.c +++ b/drivers/net/wireless/ath9k/recv.c @@ -493,6 +493,7 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush) int hdrlen, padsize, retval; bool decrypt_error = false; u8 keyix; + __le16 fc; spin_lock_bh(&sc->rx.rxbuflock); @@ -606,6 +607,7 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush) /* see if any padding is done by the hw and remove it */ hdr = (struct ieee80211_hdr *)skb->data; hdrlen = ieee80211_get_hdrlen_from_skb(skb); + fc = hdr->frame_control; /* The MAC header is padded to have 32-bit boundary if the * packet payload is non-zero. The general calculation for @@ -690,7 +692,7 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush) sc->rx.rxotherant = 0; } - if (ieee80211_is_beacon(hdr->frame_control) && + if (ieee80211_is_beacon(fc) && (sc->sc_flags & SC_OP_WAIT_FOR_BEACON)) { sc->sc_flags &= ~SC_OP_WAIT_FOR_BEACON; ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_NETWORK_SLEEP);