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| author | Xin Long <lucien.xin@gmail.com> | 2018-01-15 10:02:00 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-01-16 20:24:20 +0100 |
| commit | c5006b8aa74599ce19104b31d322d2ea9ff887cc (patch) | |
| tree | 116feac3332f40168ff3ba971256564bcb9b2b3f /net/dcb | |
| parent | sctp: return error if the asoc has been peeled off in sctp_wait_for_sndbuf (diff) | |
| download | linux-c5006b8aa74599ce19104b31d322d2ea9ff887cc.tar.xz linux-c5006b8aa74599ce19104b31d322d2ea9ff887cc.zip | |
sctp: do not allow the v4 socket to bind a v4mapped v6 address
The check in sctp_sockaddr_af is not robust enough to forbid binding a
v4mapped v6 addr on a v4 socket.
The worse thing is that v4 socket's bind_verify would not convert this
v4mapped v6 addr to a v4 addr. syzbot even reported a crash as the v4
socket bound a v6 addr.
This patch is to fix it by doing the common sa.sa_family check first,
then AF_INET check for v4mapped v6 addrs.
Fixes: 7dab83de50c7 ("sctp: Support ipv6only AF_INET6 sockets.")
Reported-by: syzbot+7b7b518b1228d2743963@syzkaller.appspotmail.com
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dcb')
0 files changed, 0 insertions, 0 deletions