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Date: Fri, 1 Feb 2013 11:48:41 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Felix Fietkau <nbd@...nwrt.org>, "John W. Linville" <linville@...driver.com> Subject: [ 08/15] ath9k: fix double-free bug on beacon generate failure 3.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Felix Fietkau <nbd@...nwrt.org> commit 1adb2e2b5f85023d17eb4f95386a57029df27c88 upstream. When the next beacon is sent, the ath_buf from the previous run is reused. If getting a new beacon from mac80211 fails, bf->bf_mpdu is not reset, yet the skb is freed, leading to a double-free on the next beacon tx attempt, resulting in a system crash. Signed-off-by: Felix Fietkau <nbd@...nwrt.org> Signed-off-by: John W. Linville <linville@...driver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/net/wireless/ath/ath9k/beacon.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/net/wireless/ath/ath9k/beacon.c +++ b/drivers/net/wireless/ath/ath9k/beacon.c @@ -159,6 +159,7 @@ static struct ath_buf *ath_beacon_genera skb->len, DMA_TO_DEVICE); dev_kfree_skb_any(skb); bf->bf_buf_addr = 0; + bf->bf_mpdu = NULL; } /* Get a new beacon from mac80211 */ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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