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ath9k: fix a stale bf->bf_next pointer, potentially leading to double-free errors and "Failed to stop Tx DMA" errors

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SVN-Revision: 33938
This commit is contained in:
Felix Fietkau 2012-10-25 21:41:56 +00:00
parent cae349b5ad
commit 42dc433e65
1 changed files with 18 additions and 0 deletions
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18
package/mac80211/patches/568-ath9k_fix_stale_pointer.patch Normal file
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@ -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);