cls_u32: use skb_header_pointer() to dereference data safely

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use skb_header_pointer() to dereference data safely

the original skb->data dereference isn't safe, as there isn't any skb->len or
skb_is_nonlinear() check. skb_header_pointer() is used instead in this patch.
And when the skb isn't long enough, we terminate the function u32_classify()
immediately with -1.

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Changli Gao 2010-06-02 07:32:42 -07:00 • committed by David S. Miller

parent edafe50240

commit fbc2e7d9cf

1 changed files with 36 additions and 13 deletions

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net/sched/cls_u32.c

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