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netfilter: ipv6: fix overlap check for fragments 

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: Patrick McHardy <kaber@trash.net>
This commit is contained in:
Shan Wei 2010-11-12 08:51:55 +01:00 committed by Patrick McHardy
parent ac5aa2e333
commit 22e091e525
1 changed files with 1 additions and 1 deletions
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2
net/ipv6/netfilter/nf_conntrack_reasm.c
View File

@ -286,7 +286,7 @@ found:
/* Check for overlap with preceding fragment. */
if (prev &&
(NFCT_FRAG6_CB(prev)->offset + prev->len) - offset > 0)
(NFCT_FRAG6_CB(prev)->offset + prev->len) > offset)
goto discard_fq;
/* Look for overlap with succeeding segment. */