From c01003c20563d1e75ec9828d21743919d2b43977 Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Thu, 29 Mar 2007 11:46:52 -0700 Subject: [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 Acked-by: Jamal Hadi Salim Signed-off-by: David S. Miller --- net/core/dev.c | 8 ++++---- net/core/skbuff.c | 2 +- net/sched/act_mirred.c | 2 +- 3 files changed, 6 insertions(+), 6 deletions(-) (limited to 'net') diff --git a/net/core/dev.c b/net/core/dev.c index 5984b55311a1..d44b8f1964fa 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1741,8 +1741,8 @@ static int ing_filter(struct sk_buff *skb) if (dev->qdisc_ingress) { __u32 ttl = (__u32) G_TC_RTTL(skb->tc_verd); if (MAX_RED_LOOP < ttl++) { - printk(KERN_WARNING "Redir loop detected Dropping packet (%s->%s)\n", - skb->input_dev->name, skb->dev->name); + printk(KERN_WARNING "Redir loop detected Dropping packet (%d->%d)\n", + skb->iif, skb->dev->ifindex); return TC_ACT_SHOT; } @@ -1775,8 +1775,8 @@ int netif_receive_skb(struct sk_buff *skb) if (!skb->tstamp.off_sec) net_timestamp(skb); - if (!skb->input_dev) - skb->input_dev = skb->dev; + if (!skb->iif) + skb->iif = skb->dev->ifindex; orig_dev = skb_bond(skb); diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 702fa8f08747..87573ae35b02 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -496,7 +496,7 @@ struct sk_buff *skb_clone(struct sk_buff *skb, gfp_t gfp_mask) n->tc_verd = SET_TC_VERD(skb->tc_verd,0); n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd); n->tc_verd = CLR_TC_MUNGED(n->tc_verd); - C(input_dev); + C(iif); #endif skb_copy_secmark(n, skb); #endif diff --git a/net/sched/act_mirred.c b/net/sched/act_mirred.c index 68f26cb278f9..3e93683e9ab3 100644 --- a/net/sched/act_mirred.c +++ b/net/sched/act_mirred.c @@ -198,7 +198,7 @@ bad_mirred: skb2->tc_verd = SET_TC_FROM(skb2->tc_verd, at); skb2->dev = dev; - skb2->input_dev = skb->dev; + skb2->iif = skb->dev->ifindex; dev_queue_xmit(skb2); spin_unlock(&m->tcf_lock); return m->tcf_action; -- cgit v1.2.3-59-g8ed1b