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| author | David S. Miller <davem@davemloft.net> | 2014-01-02 19:50:52 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-01-02 19:50:52 -0500 |
| commit | aca5f58f9ba803ec8c2e6bcf890db17589e8dfcc (patch) | |
| tree | ff755921037506eae0f5204dad52815d5e8c9b30 /net/core/netpoll.c | |
| parent | 469bdcefdc47a69028029e792ff1e80680c867b9 (diff) | |
| download | linux-stable-aca5f58f9ba803ec8c2e6bcf890db17589e8dfcc.tar.gz linux-stable-aca5f58f9ba803ec8c2e6bcf890db17589e8dfcc.tar.bz2 linux-stable-aca5f58f9ba803ec8c2e6bcf890db17589e8dfcc.zip | |
netpoll: Fix missing TXQ unlock and and OOPS.
The VLAN tag handling code in netpoll_send_skb_on_dev() has two problems.
1) It exits without unlocking the TXQ.
2) It then tries to queue a NULL skb to npinfo->txq.
Reported-by: Ahmed Tamrawi <atamrawi@iastate.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/netpoll.c')
| -rw-r--r-- | net/core/netpoll.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/net/core/netpoll.c b/net/core/netpoll.c index 8f971990677c..303097874633 100644 --- a/net/core/netpoll.c +++ b/net/core/netpoll.c @@ -386,8 +386,14 @@ void netpoll_send_skb_on_dev(struct netpoll *np, struct sk_buff *skb, !vlan_hw_offload_capable(netif_skb_features(skb), skb->vlan_proto)) { skb = __vlan_put_tag(skb, skb->vlan_proto, vlan_tx_tag_get(skb)); - if (unlikely(!skb)) - break; + if (unlikely(!skb)) { + /* This is actually a packet drop, but we + * don't want the code at the end of this + * function to try and re-queue a NULL skb. + */ + status = NETDEV_TX_OK; + goto unlock_txq; + } skb->vlan_tci = 0; } @@ -395,6 +401,7 @@ void netpoll_send_skb_on_dev(struct netpoll *np, struct sk_buff *skb, if (status == NETDEV_TX_OK) txq_trans_update(txq); } + unlock_txq: __netif_tx_unlock(txq); if (status == NETDEV_TX_OK) |