4.17-stable review patch. If anyone has any objections, please let me know.
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From: Sabrina Dubroca sd@queasysnail.net
[ Upstream commit 848235edb5c93ed086700584c8ff64f6d7fc778d ]
Currently, raw6_sk(sk)->ip6mr_table is set unconditionally during ip6_mroute_setsockopt(MRT6_TABLE). A subsequent attempt at the same setsockopt will fail with -ENOENT, since we haven't actually created that table.
A similar fix for ipv4 was included in commit 5e1859fbcc3c ("ipv4: ipmr: various fixes and cleanups").
Fixes: d1db275dd3f6 ("ipv6: ip6mr: support multiple tables") Signed-off-by: Sabrina Dubroca sd@queasysnail.net Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/ipv6/ip6mr.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/net/ipv6/ip6mr.c +++ b/net/ipv6/ip6mr.c @@ -1759,7 +1759,8 @@ int ip6_mroute_setsockopt(struct sock *s ret = 0; if (!ip6mr_new_table(net, v)) ret = -ENOMEM; - raw6_sk(sk)->ip6mr_table = v; + else + raw6_sk(sk)->ip6mr_table = v; rtnl_unlock(); return ret; }