diff options
| author | Hangbin Liu <liuhangbin@gmail.com> | 2020-06-01 06:55:03 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-06-17 17:40:19 +0300 |
| commit | f560ea659b33097cb784dd14d1bde05377d58cdb (patch) | |
| tree | 1103784a1278191313f92e41fa9bd300c5b1dae7 | |
| parent | 5e3c511539228fa03c8d00d61b5b5f32333ed0b0 (diff) | |
| download | linux-f560ea659b33097cb784dd14d1bde05377d58cdb.tar.xz | |
ipv6: fix IPV6_ADDRFORM operation logic
[ Upstream commit 79a1f0ccdbb4ad700590f61b00525b390cb53905 ]
Socket option IPV6_ADDRFORM supports UDP/UDPLITE and TCP at present.
Previously the checking logic looks like:
if (sk->sk_protocol == IPPROTO_UDP || sk->sk_protocol == IPPROTO_UDPLITE)
do_some_check;
else if (sk->sk_protocol != IPPROTO_TCP)
break;
After commit b6f6118901d1 ("ipv6: restrict IPV6_ADDRFORM operation"), TCP
was blocked as the logic changed to:
if (sk->sk_protocol == IPPROTO_UDP || sk->sk_protocol == IPPROTO_UDPLITE)
do_some_check;
else if (sk->sk_protocol == IPPROTO_TCP)
do_some_check;
break;
else
break;
Then after commit 82c9ae440857 ("ipv6: fix restrict IPV6_ADDRFORM operation")
UDP/UDPLITE were blocked as the logic changed to:
if (sk->sk_protocol == IPPROTO_UDP || sk->sk_protocol == IPPROTO_UDPLITE)
do_some_check;
if (sk->sk_protocol == IPPROTO_TCP)
do_some_check;
if (sk->sk_protocol != IPPROTO_TCP)
break;
Fix it by using Eric's code and simply remove the break in TCP check, which
looks like:
if (sk->sk_protocol == IPPROTO_UDP || sk->sk_protocol == IPPROTO_UDPLITE)
do_some_check;
else if (sk->sk_protocol == IPPROTO_TCP)
do_some_check;
else
break;
Fixes: 82c9ae440857 ("ipv6: fix restrict IPV6_ADDRFORM operation")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/ipv6/ipv6_sockglue.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c index 18d05403d3b5..5af97b4f5df3 100644 --- a/net/ipv6/ipv6_sockglue.c +++ b/net/ipv6/ipv6_sockglue.c @@ -183,14 +183,15 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, retv = -EBUSY; break; } - } - if (sk->sk_protocol == IPPROTO_TCP && - sk->sk_prot != &tcpv6_prot) { - retv = -EBUSY; + } else if (sk->sk_protocol == IPPROTO_TCP) { + if (sk->sk_prot != &tcpv6_prot) { + retv = -EBUSY; + break; + } + } else { break; } - if (sk->sk_protocol != IPPROTO_TCP) - break; + if (sk->sk_state != TCP_ESTABLISHED) { retv = -ENOTCONN; break; |