mutex_destroy() must be called before wpan_phy_free(), because it puts the last
reference and frees memory. Catched as overwritten poison in kmalloc-2048.

Signed-off-by: Konstantin Khlebnikov <[email protected]>
Cc: Alexander Smirnov <[email protected]>
Cc: Dmitry Eremin-Solenikov <[email protected]>
Cc: David S. Miller <[email protected]>
Cc: [email protected]
Cc: [email protected]
---
 net/mac802154/ieee802154_dev.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/mac802154/ieee802154_dev.c b/net/mac802154/ieee802154_dev.c
index e748aed..b7c7f81 100644
--- a/net/mac802154/ieee802154_dev.c
+++ b/net/mac802154/ieee802154_dev.c
@@ -224,9 +224,9 @@ void ieee802154_free_device(struct ieee802154_dev *hw)
 
        BUG_ON(!list_empty(&priv->slaves));
 
-       wpan_phy_free(priv->phy);
-
        mutex_destroy(&priv->slaves_mtx);
+
+       wpan_phy_free(priv->phy);
 }
 EXPORT_SYMBOL(ieee802154_free_device);
 

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