From a6c0f8217c17d46da22fa56923f3cbd03615cb7c Mon Sep 17 00:00:00 2001 From: Denis Kirjanov Date: Sun, 23 May 2010 05:45:45 +0000 Subject: [PATCH] ieee802154: Fix possible NULL pointer dereference in wpan_phy_alloc Check for NULL pointer after kzalloc Signed-off-by: Denis Kirjanov Signed-off-by: David S. Miller --- net/ieee802154/wpan-class.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/net/ieee802154/wpan-class.c b/net/ieee802154/wpan-class.c index 3d803a1b9fb6..1627ef2e8522 100644 --- a/net/ieee802154/wpan-class.c +++ b/net/ieee802154/wpan-class.c @@ -147,13 +147,15 @@ struct wpan_phy *wpan_phy_alloc(size_t priv_size) 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 @@ struct wpan_phy *wpan_phy_alloc(size_t priv_size) phy->current_page = 0; /* for compatibility */ return phy; + +out: + return NULL; } EXPORT_SYMBOL(wpan_phy_alloc); -- 2.30.2