This is a note to let you know that I've just added the patch titled
ath9k: fix double-free bug on beacon generate failure
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ath9k-fix-double-free-bug-on-beacon-generate-failure.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 1adb2e2b5f85023d17eb4f95386a57029df27c88 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <[email protected]>
Date: Wed, 9 Jan 2013 16:16:53 +0100
Subject: ath9k: fix double-free bug on beacon generate failure
From: Felix Fietkau <[email protected]>
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 <[email protected]>
Signed-off-by: John W. Linville <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
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
@@ -154,6 +154,7 @@ 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 */
Patches currently in stable-queue which might be from [email protected] are
queue-3.4/ath9k-fix-double-free-bug-on-beacon-generate-failure.patch
queue-3.4/ath9k-do-not-link-receive-buffers-during-flush.patch
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