diff options
| author | John Haxby <john.haxby@oracle.com> | 2020-04-18 18:30:49 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-29 17:33:07 +0300 |
| commit | 2d197d8e1aa409e86aa5f6f7a00b3616dde2add2 (patch) | |
| tree | 2754227b9c3b24ef616d1fa7c6d904c2f9220a74 /net/ipv6 | |
| parent | 382f57b996aa90dcfb13b02fcadeeb3c264cb996 (diff) | |
| download | linux-2d197d8e1aa409e86aa5f6f7a00b3616dde2add2.tar.xz | |
ipv6: fix restrict IPV6_ADDRFORM operation
[ Upstream commit 82c9ae440857840c56e05d4fb1427ee032531346 ]
Commit b6f6118901d1 ("ipv6: restrict IPV6_ADDRFORM operation") fixed a
problem found by syzbot an unfortunate logic error meant that it
also broke IPV6_ADDRFORM.
Rearrange the checks so that the earlier test is just one of the series
of checks made before moving the socket from IPv6 to IPv4.
Fixes: b6f6118901d1 ("ipv6: restrict IPV6_ADDRFORM operation")
Signed-off-by: John Haxby <john.haxby@oracle.com>
Cc: stable@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/ipv6_sockglue.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c index debdaeba5d8c..18d05403d3b5 100644 --- a/net/ipv6/ipv6_sockglue.c +++ b/net/ipv6/ipv6_sockglue.c @@ -183,15 +183,14 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, retv = -EBUSY; break; } - } else if (sk->sk_protocol == IPPROTO_TCP) { - if (sk->sk_prot != &tcpv6_prot) { - retv = -EBUSY; - break; - } - break; - } else { + } + if (sk->sk_protocol == IPPROTO_TCP && + sk->sk_prot != &tcpv6_prot) { + retv = -EBUSY; break; } + if (sk->sk_protocol != IPPROTO_TCP) + break; if (sk->sk_state != TCP_ESTABLISHED) { retv = -ENOTCONN; break; |