diff options
| author | Xin Long <lucien.xin@gmail.com> | 2018-01-15 17:02:00 +0800 |
|---|---|---|
| committer | Moyster <oysterized@gmail.com> | 2019-05-02 17:00:04 +0200 |
| commit | b6db197e52040470f999d2351ede688063c131d5 (patch) | |
| tree | 6197ecf705265d92a3b73b2f08fbcdcc5cdf8f02 /include/linux | |
| parent | 154dfe76fe2697d105b8ce13964de26f5b993551 (diff) | |
sctp: do not allow the v4 socket to bind a v4mapped v6 address
commit c5006b8aa74599ce19104b31d322d2ea9ff887cc upstream.
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.")
Change-Id: I86dc74ac4606693e19a60afefd10973e2d02e882
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>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'include/linux')
0 files changed, 0 insertions, 0 deletions