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authornbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>2012-10-25 21:42:19 +0000
committernbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>2012-10-25 21:42:19 +0000
commit4812edf613c49689d40d9dd35b1a90377585d2a8 (patch)
tree6c4b8f5acb0847ab0a50b6964cf048925c922f9e
parent6566cf33998015ea121b822329a407930c81d40f (diff)
downloadopenwrt-4812edf613c49689d40d9dd35b1a90377585d2a8.tar.gz
openwrt-4812edf613c49689d40d9dd35b1a90377585d2a8.zip
ath9k: fix a stale bf->bf_next pointer, potentially leading to double-free errors and "Failed to stop Tx DMA" errors
Backport of r33938 git-svn-id: svn://svn.openwrt.org/openwrt/branches/attitude_adjustment@33939 3c298f89-4303-0410-b956-a3cf2f4a3e73
-rw-r--r--package/mac80211/patches/568-ath9k_fix_stale_pointer.patch18
1 files changed, 18 insertions, 0 deletions
diff --git a/package/mac80211/patches/568-ath9k_fix_stale_pointer.patch b/package/mac80211/patches/568-ath9k_fix_stale_pointer.patch
new file mode 100644
index 000000000..95ed6876f
--- /dev/null
+++ b/package/mac80211/patches/568-ath9k_fix_stale_pointer.patch
@@ -0,0 +1,18 @@
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -312,6 +312,7 @@ 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);
+@@ -1774,6 +1775,7 @@ static void ath_tx_send_normal(struct at
+ list_add_tail(&bf->list, &bf_head);
+ bf->bf_state.bf_type = 0;
+
++ bf->bf_next = NULL;
+ bf->bf_lastbf = bf;
+ ath_tx_fill_desc(sc, bf, txq, fi->framelen);
+ ath_tx_txqaddbuf(sc, txq, &bf_head, false);