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authorDavid S. Miller <davem@sunset.davemloft.net>2007-01-25 19:30:36 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2007-01-25 19:30:36 -0800
commitd5e76b0a280f71b20bdd20d1c1b4d6812ceb8c3a (patch)
tree66241edf73d49e78cc85c0123178fb56b551a282
parent95743deb34de29defbb98ad477700aaf344f93f3 (diff)
[AF_PACKET]: Check device down state before hard header callbacks.
If the device is down, invoking the device hard header callbacks is not legal, so check it early. Based upon a shaper OOPS report from Frederik Deweerdt. Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/packet/af_packet.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 594c078c5ebc..6dc01bdeb76b 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -359,6 +359,10 @@ static int packet_sendmsg_spkt(struct kiocb *iocb, struct socket *sock,
if (dev == NULL)
goto out_unlock;
+ err = -ENETDOWN;
+ if (!(dev->flags & IFF_UP))
+ goto out_unlock;
+
/*
* You may not queue a frame bigger than the mtu. This is the lowest level
* raw protocol and you must do your own fragmentation at this level.
@@ -407,10 +411,6 @@ static int packet_sendmsg_spkt(struct kiocb *iocb, struct socket *sock,
if (err)
goto out_free;
- err = -ENETDOWN;
- if (!(dev->flags & IFF_UP))
- goto out_free;
-
/*
* Now send it
*/
@@ -738,6 +738,10 @@ static int packet_sendmsg(struct kiocb *iocb, struct socket *sock,
if (sock->type == SOCK_RAW)
reserve = dev->hard_header_len;
+ err = -ENETDOWN;
+ if (!(dev->flags & IFF_UP))
+ goto out_unlock;
+
err = -EMSGSIZE;
if (len > dev->mtu+reserve)
goto out_unlock;
@@ -770,10 +774,6 @@ static int packet_sendmsg(struct kiocb *iocb, struct socket *sock,
skb->dev = dev;
skb->priority = sk->sk_priority;
- err = -ENETDOWN;
- if (!(dev->flags & IFF_UP))
- goto out_free;
-
/*
* Now send it
*/