Commit e5268f12 authored by YOSHIFUJI Hideaki's avatar YOSHIFUJI Hideaki Committed by David S. Miller
Browse files

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

Bug noticed by Chris Wright <>.
Signed-off-by: default avatarYOSHIFUJI Hideaki <>
Signed-off-by: default avatarDavid S. Miller <>
parent 4c6510a7
......@@ -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,
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