3.0-stable patches

added patches:
	ath9k-fix-stale-pointers-potentially-causing-access-to-free-d-skbs.patch

diff --git a/queue-3.0/ath9k-fix-stale-pointers-potentially-causing-access-to-free-d-skbs.patch b/queue-3.0/ath9k-fix-stale-pointers-potentially-causing-access-to-free-d-skbs.patch
new file mode 100644 (file)
index 0000000..4459c18
--- /dev/null
+++ b/queue-3.0/ath9k-fix-stale-pointers-potentially-causing-access-to-free-d-skbs.patch
@@ -0,0 +1,43 @@
+From 8c6e30936a7893a85f6222084f0f26aceb81137a Mon Sep 17 00:00:00 2001
+From: Felix Fietkau <nbd@openwrt.org>
+Date: Fri, 26 Oct 2012 00:31:11 +0200
+Subject: ath9k: fix stale pointers potentially causing access to free'd skbs
+
+From: Felix Fietkau <nbd@openwrt.org>
+
+commit 8c6e30936a7893a85f6222084f0f26aceb81137a upstream.
+
+bf->bf_next is only while buffers are chained as part of an A-MPDU
+in the tx queue. When a tid queue is flushed (e.g. on tearing down
+an aggregation session), frames can be enqueued again as normal
+transmission, without bf_next being cleared. This can lead to the
+old pointer being dereferenced again later.
+
+This patch might fix crashes and "Failed to stop TX DMA!" messages.
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+Signed-off-by: John W. Linville <linville@tuxdriver.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ drivers/net/wireless/ath/ath9k/xmit.c |    2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -272,6 +272,7 @@ static struct ath_buf *ath_tx_get_buffer
+       }
+ 
+       bf = list_first_entry(&sc->tx.txbuf, struct ath_buf, list);
++      bf->bf_next = NULL;
+       list_del(&bf->list);
+ 
+       spin_unlock_bh(&sc->tx.txbuflock);
+@@ -1488,6 +1489,7 @@ static void ath_tx_send_normal(struct at
+       if (tid)
+               INCR(tid->seq_start, IEEE80211_SEQ_MAX);
+ 
++      bf->bf_next = NULL;
+       bf->bf_lastbf = bf;
+       fi = get_frame_info(bf->bf_mpdu);
+       ath_buf_set_rate(sc, bf, fi->framelen);

diff --git a/queue-3.0/series b/queue-3.0/series
new file mode 100644 (file)
index 0000000..45e1209
--- /dev/null
+++ b/queue-3.0/series
@@ -0,0 +1 @@
+ath9k-fix-stale-pointers-potentially-causing-access-to-free-d-skbs.patch