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authorPatrick McHardy <kaber@trash.net>2007-03-29 22:46:52 +0400
committerDavid S. Miller <davem@davemloft.net>2007-03-29 22:46:52 +0400
commitc01003c20563d1e75ec9828d21743919d2b43977 (patch)
tree21cae8933e8a4908d8e8c24244a627bf0c997e77 /include/net/pkt_cls.h
parentdb8b22550d4b83f0910d27a34d05aa16f7f7159f (diff)
downloadlinux-c01003c20563d1e75ec9828d21743919d2b43977.tar.xz
[IFB]: Fix crash on input device removal
The input_device pointer is not refcounted, which means the device may disappear while packets are queued, causing a crash when ifb passes packets with a stale skb->dev pointer to netif_rx(). Fix by storing the interface index instead and do a lookup where neccessary. Signed-off-by: Patrick McHardy <kaber@trash.net> Acked-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/pkt_cls.h')
-rw-r--r--include/net/pkt_cls.h7
1 files changed, 5 insertions, 2 deletions
diff --git a/include/net/pkt_cls.h b/include/net/pkt_cls.h
index b902d24a3256..02647fe3d74b 100644
--- a/include/net/pkt_cls.h
+++ b/include/net/pkt_cls.h
@@ -352,10 +352,13 @@ tcf_change_indev(struct tcf_proto *tp, char *indev, struct rtattr *indev_tlv)
static inline int
tcf_match_indev(struct sk_buff *skb, char *indev)
{
+ struct net_device *dev;
+
if (indev[0]) {
- if (!skb->input_dev)
+ if (!skb->iif)
return 0;
- if (strcmp(indev, skb->input_dev->name))
+ dev = __dev_get_by_index(skb->iif);
+ if (!dev || strcmp(indev, dev->name))
return 0;
}