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[NET]: 2.6.13 breaks libpcap (and tcpdump) 

Patrick McHardy says:

  Never mind, I got it, we never fall through to the second switch
  statement anymore. I think we could simply break when load_pointer
  returns NULL. The switch statement will fall through to the default
  case and return 0 for all cases but 0 > k >= SKF_AD_OFF.

Here's a patch to do just that.

I left BPF_MSH alone because it's really a hack to calculate the IP
header length, which makes no sense when applied to the special data.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
wifi-calibration
Herbert Xu 2005-09-05 18:44:37 -07:00 committed by David S. Miller
parent 6baf1f417d
commit 1198ad002a
1 changed files with 3 additions and 3 deletions
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6
net/core/filter.c
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@ -182,7 +182,7 @@ int sk_run_filter(struct sk_buff *skb, struct sock_filter *filter, int flen)
A = ntohl(*(u32 *)ptr);
continue;
}
return 0;
break;
case BPF_LD|BPF_H|BPF_ABS:
k = fentry->k;
load_h:
@ -191,7 +191,7 @@ int sk_run_filter(struct sk_buff *skb, struct sock_filter *filter, int flen)
A = ntohs(*(u16 *)ptr);
continue;
}
return 0;
break;
case BPF_LD|BPF_B|BPF_ABS:
k = fentry->k;
load_b:
@ -200,7 +200,7 @@ load_b:
A = *(u8 *)ptr;
continue;
}
return 0;
break;
case BPF_LD|BPF_W|BPF_LEN:
A = skb->len;
continue;