ieee802154: Fix possible NULL pointer dereference in wpan_phy_alloc
Check for NULL pointer after kzalloc
Signed-off-by: Denis Kirjanov <dkirjanov@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ieee802154/wpan-class.c b/net/ieee802154/wpan-class.c
index 3d803a1..1627ef2 100644
--- a/net/ieee802154/wpan-class.c
+++ b/net/ieee802154/wpan-class.c
@@ -147,13 +147,15 @@
struct wpan_phy *phy = kzalloc(sizeof(*phy) + priv_size,
GFP_KERNEL);
+ if (!phy)
+ goto out;
mutex_lock(&wpan_phy_mutex);
phy->idx = wpan_phy_idx++;
if (unlikely(!wpan_phy_idx_valid(phy->idx))) {
wpan_phy_idx--;
mutex_unlock(&wpan_phy_mutex);
kfree(phy);
- return NULL;
+ goto out;
}
mutex_unlock(&wpan_phy_mutex);
@@ -168,6 +170,9 @@
phy->current_page = 0; /* for compatibility */
return phy;
+
+out:
+ return NULL;
}
EXPORT_SYMBOL(wpan_phy_alloc);