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| author | Jukka Rissanen <jukka.rissanen@linux.intel.com> | 2014-10-01 12:30:57 +0400 |
|---|---|---|
| committer | Johan Hedberg <johan.hedberg@intel.com> | 2014-10-02 14:41:32 +0400 |
| commit | a7807d73a0fa9b33dbdfd5f1cb97970ccc91d77e (patch) | |
| tree | b1b369c0f169d5c16d21f3cbe2bf998649dd4796 /net/bluetooth/6lowpan.c | |
| parent | fc12518a4bcbd4214652291df76f692343bca3d5 (diff) | |
| download | linux-a7807d73a0fa9b33dbdfd5f1cb97970ccc91d77e.tar.xz | |
Bluetooth: 6lowpan: Avoid memory leak if memory allocation fails
If skb_unshare() returns NULL, then we leak the original skb.
Solution is to use temp variable to hold the new skb.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Diffstat (limited to 'net/bluetooth/6lowpan.c')
| -rw-r--r-- | net/bluetooth/6lowpan.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/net/bluetooth/6lowpan.c b/net/bluetooth/6lowpan.c index add2b58312d7..44eaad77e70c 100644 --- a/net/bluetooth/6lowpan.c +++ b/net/bluetooth/6lowpan.c @@ -589,13 +589,17 @@ static netdev_tx_t bt_xmit(struct sk_buff *skb, struct net_device *netdev) int err = 0; bdaddr_t addr; u8 addr_type; + struct sk_buff *tmpskb; /* We must take a copy of the skb before we modify/replace the ipv6 * header as the header could be used elsewhere */ - skb = skb_unshare(skb, GFP_ATOMIC); - if (!skb) + tmpskb = skb_unshare(skb, GFP_ATOMIC); + if (!tmpskb) { + kfree_skb(skb); return NET_XMIT_DROP; + } + skb = tmpskb; /* Return values from setup_header() * <0 - error, packet is dropped |