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| author | Brian Haley <brian.haley@hp.com> | 2008-11-12 22:59:21 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-11-12 22:59:21 -0800 |
| commit | 6e093d9dfffc9a02cd54d36904c62f705f09900a (patch) | |
| tree | b9250d24821ffa8edb55fee50e0d695afd23a6f9 /net | |
| parent | b2af2c1d3e4ddeea9d02c46d0df0c322cc7b7061 (diff) | |
| download | lwn-6e093d9dfffc9a02cd54d36904c62f705f09900a.tar.gz lwn-6e093d9dfffc9a02cd54d36904c62f705f09900a.zip | |
ipv6: routing header fixes
This patch fixes two bugs:
1. setsockopt() of anything but a Type 2 routing header should return
EINVAL instead of EPERM. Noticed by Shan Wei
(shanwei@cn.fujitsu.com).
2. setsockopt()/sendmsg() of a Type 2 routing header with invalid
length or segments should return EINVAL. These values are statically
fixed in RFC 3775, unlike the variable Type 0 was.
Signed-off-by: Brian Haley <brian.haley@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/datagram.c | 5 | ||||
| -rw-r--r-- | net/ipv6/ipv6_sockglue.c | 5 |
2 files changed, 10 insertions, 0 deletions
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c index 410046a8cc91..e44deb8d4df2 100644 --- a/net/ipv6/datagram.c +++ b/net/ipv6/datagram.c @@ -661,6 +661,11 @@ int datagram_send_ctl(struct net *net, switch (rthdr->type) { #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) case IPV6_SRCRT_TYPE_2: + if (rthdr->hdrlen != 2 || + rthdr->segments_left != 1) { + err = -EINVAL; + goto exit_f; + } break; #endif default: diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c index 4e5eac301f91..2aa294be0c79 100644 --- a/net/ipv6/ipv6_sockglue.c +++ b/net/ipv6/ipv6_sockglue.c @@ -366,11 +366,16 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, } /* routing header option needs extra check */ + retv = -EINVAL; if (optname == IPV6_RTHDR && opt && opt->srcrt) { struct ipv6_rt_hdr *rthdr = opt->srcrt; switch (rthdr->type) { #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) case IPV6_SRCRT_TYPE_2: + if (rthdr->hdrlen != 2 || + rthdr->segments_left != 1) + goto sticky_done; + break; #endif default: |