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authorLennert Buytenhek <buytenh@wantstofly.org>2015-07-21 17:44:47 +0300
committerMarcel Holtmann <marcel@holtmann.org>2015-07-30 14:08:55 +0200
commitc22ff7b4e74d8136a9911d8b8d0f25f9f7c3edc1 (patch)
tree172c0937f69b785793e1f2e63776341833c5800b /net/mac802154/ieee802154_i.h
parent8b44f0dd2f90acd6c8842537223b39f890f2e713 (diff)
downloadlinux-c22ff7b4e74d8136a9911d8b8d0f25f9f7c3edc1.tar.bz2
mac802154: Fix memory corruption with global deferred transmit state.
When transmitting a packet via a mac802154 driver that can sleep in its transmit function, mac802154 defers the call to the driver's transmit function to a per-device workqueue. However, mac802154 uses a single global work_struct for this, which means that if you have more than one registered mac802154 interface in the system, and you transmit on more than one of them at the same time, you'll very easily cause memory corruption. This patch moves the deferred transmit processing state from global variables to struct ieee802154_local, and this seems to fix the memory corruption issue. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Acked-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/mac802154/ieee802154_i.h')
-rw-r--r--net/mac802154/ieee802154_i.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/mac802154/ieee802154_i.h b/net/mac802154/ieee802154_i.h
index 6810d7a25aca..56ccffa3f2bf 100644
--- a/net/mac802154/ieee802154_i.h
+++ b/net/mac802154/ieee802154_i.h
@@ -60,6 +60,9 @@ struct ieee802154_local {
struct tasklet_struct tasklet;
struct sk_buff_head skb_queue;
+
+ struct sk_buff *tx_skb;
+ struct work_struct tx_work;
};
enum {
@@ -125,6 +128,7 @@ ieee802154_sdata_running(struct ieee802154_sub_if_data *sdata)
extern struct ieee802154_mlme_ops mac802154_mlme_wpan;
void ieee802154_rx(struct ieee802154_local *local, struct sk_buff *skb);
+void ieee802154_xmit_worker(struct work_struct *work);
netdev_tx_t
ieee802154_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
netdev_tx_t