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[IPV6]: Ensure to truncate result and return full length for sticky options.

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Bug noticed by Chris Wright <chrisw@sous-sol.org>.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YOSHIFUJI Hideaki 2007-03-08 20:48:23 -08:00 committed by David S. Miller
parent 4c6510a738
commit e5268f12f2
1 changed files with 2 additions and 2 deletions
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4
net/ipv6/ipv6_sockglue.c
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@ -825,9 +825,9 @@ static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
return 0;
len = min_t(unsigned int, len, ipv6_optlen(hdr));
if (copy_to_user(optval, hdr, ipv6_optlen(hdr)))
if (copy_to_user(optval, hdr, len));
return -EFAULT;
return len;
return ipv6_optlen(hdr);
}
static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,