diff options
| author | Guillaume Nault <gnault@redhat.com> | 2022-02-10 16:08:08 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-02-11 11:18:59 +0000 |
| commit | b9605161e7be40fdd0fa0685b5c534e6201ac04b (patch) | |
| tree | bb661f706cfb2ab9f36f12a0e72ff2e57578954d /net | |
| parent | 12a8f37fd2d3eb5e6d1b2c50e9ed63dd60b43625 (diff) | |
| download | linux-b9605161e7be40fdd0fa0685b5c534e6201ac04b.tar.bz2 | |
ipv6: Reject routes configurations that specify dsfield (tos)
The ->rtm_tos option is normally used to route packets based on both
the destination address and the DS field. However it's ignored for
IPv6 routes. Setting ->rtm_tos for IPv6 is thus invalid as the route
is going to work only on the destination address anyway, so it won't
behave as specified.
Suggested-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/route.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index f4884cda13b9..dd98a11fbdb6 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -5009,6 +5009,12 @@ static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh, err = -EINVAL; rtm = nlmsg_data(nlh); + if (rtm->rtm_tos) { + NL_SET_ERR_MSG(extack, + "Invalid dsfield (tos): option not available for IPv6"); + goto errout; + } + *cfg = (struct fib6_config){ .fc_table = rtm->rtm_table, .fc_dst_len = rtm->rtm_dst_len, |