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| author | John Haxby <john.haxby@oracle.com> | 2020-04-18 16:30:49 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-02 17:24:16 +0200 |
| commit | e7dff38799ee7f3e867a880b26697b03d3b74744 (patch) | |
| tree | cc6db6e82a856c22558314f9a9eb4b36a627d53b /net | |
| parent | e62f0f18405006eae5b362c6b3182cda1d1b3950 (diff) | |
| download | linux-stable-e7dff38799ee7f3e867a880b26697b03d3b74744.tar.gz linux-stable-e7dff38799ee7f3e867a880b26697b03d3b74744.tar.bz2 linux-stable-e7dff38799ee7f3e867a880b26697b03d3b74744.zip | |
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')
| -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 8c492471b0da..337b43d4c3eb 100644 --- a/net/ipv6/ipv6_sockglue.c +++ b/net/ipv6/ipv6_sockglue.c @@ -185,15 +185,14 @@ 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; |