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ipv6: fix overlap check for fragments

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The type of FRAG6_CB(prev)->offset is int, skb->len is *unsigned* int,
and offset is int.

Without this patch, type conversion occurred to this expression, when
(FRAG6_CB(prev)->offset + prev->len) is less than offset.

Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Shan Wei 2010-11-05 01:56:34 +00:00 committed by David S. Miller
parent 4c46ee5258
commit f46421416f
1 changed files with 1 additions and 1 deletions
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2
net/ipv6/reassembly.c
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@ -349,7 +349,7 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
/* Check for overlap with preceding fragment. */
if (prev &&
(FRAG6_CB(prev)->offset + prev->len) - offset > 0)
(FRAG6_CB(prev)->offset + prev->len) > offset)
goto discard_fq;
/* Look for overlap with succeeding segment. */