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由 Herbert Xu 提交于
If the caller of pskb_expand_head specifies a negative nhead we'll silently overwrite other people's memory. This patch makes it BUG instead. Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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