netfilter: ip6t_NPT: Fix adjustment calculation

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Cast __wsum from/to __sum16 is wrong.  Instead, apply appropriate
conversion function: csum_unfold() or csum_fold().

[ The original patch has been modified to undo the final ~ that
  csum_fold returns. We only need to fold the 32-bit word that
  results from the checksum calculation into a 16-bit to ensure
  that the original subnet is restored appropriately. Spotted by
  Ulrich Weber. ]

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

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YOSHIFUJI Hideaki / 吉藤英明 2013-01-26 08:37:48 +00:00 • committed by Pablo Neira Ayuso

parent 4b47bc9a9e

commit f5271fff56

1 changed files with 3 additions and 3 deletions

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net/ipv6/netfilter/ip6t_NPT.c

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