diff options
| author | Ingo Molnar <mingo@elte.hu> | 2008-06-23 11:29:11 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-06-23 11:29:11 +0200 |
| commit | 1e74f9cbbba5348a6c58988cce0f19d6ef887cc8 (patch) | |
| tree | 47fcfdba6a17a02cf6745146ebb2ae435405ab1a /net/ipv6/ipv6_sockglue.c | |
| parent | 31a72bce0bd6f3e0114009288bccbc96376eeeca (diff) | |
| parent | 481c5346d0981940ee63037eb53e4e37b0735c10 (diff) | |
Merge branch 'linus' into core/rcutip-core-rcu-2008-06-23_09.29_Mon
Diffstat (limited to 'net/ipv6/ipv6_sockglue.c')
| -rw-r--r-- | net/ipv6/ipv6_sockglue.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c index c042ce19bd14..86e28a75267f 100644 --- a/net/ipv6/ipv6_sockglue.c +++ b/net/ipv6/ipv6_sockglue.c @@ -345,18 +345,21 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, case IPV6_DSTOPTS: { struct ipv6_txoptions *opt; + + /* remove any sticky options header with a zero option + * length, per RFC3542. + */ if (optlen == 0) optval = NULL; + else if (optlen < sizeof(struct ipv6_opt_hdr) || + optlen & 0x7 || optlen > 8 * 255) + goto e_inval; /* hop-by-hop / destination options are privileged option */ retv = -EPERM; if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW)) break; - if (optlen < sizeof(struct ipv6_opt_hdr) || - optlen & 0x7 || optlen > 8 * 255) - goto e_inval; - opt = ipv6_renew_options(sk, np->opt, optname, (struct ipv6_opt_hdr __user *)optval, optlen); |