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SubjectRe: Kernel 2.6.13 breaks libpcap (and tcpdump).
Herbert Xu wrote:
> We aren't handling the reading of specific fields like the IP protocol
> field correctly. This patch should make it work again.

I can't spot the problem, could you give me a hint?

> I tried to move this logic into the new load_pointer function but it
> all came out messy so I simply rolled it back.

k = fentry->k;
- ptr = load_pointer(skb, k, 4, &tmp);
+ if (k >= 0)
+ ptr = skb_header_pointer(skb, k, 4, &tmp);
+ else if (k < SKF_AD_OFF)
+ ptr = load_pointer(skb, k);
+ else
+ break;

The old value of ptr will be used in this case, it should
be explicitly set to NULL to abort.
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