From foo@baz Tue 01 Oct 2019 03:27:55 PM CEST From: Ori Nimron <orinimron123@gmail.com> Date: Fri, 20 Sep 2019 09:35:45 +0200 Subject: mISDN: enforce CAP_NET_RAW for raw sockets From: Ori Nimron <orinimron123@gmail.com> [ Upstream commit b91ee4aa2a2199ba4d4650706c272985a5a32d80 ] When creating a raw AF_ISDN socket, CAP_NET_RAW needs to be checked first. Signed-off-by: Ori Nimron <orinimron123@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/isdn/mISDN/socket.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/isdn/mISDN/socket.c +++ b/drivers/isdn/mISDN/socket.c @@ -754,6 +754,8 @@ base_sock_create(struct net *net, struct if (sock->type != SOCK_RAW) return -ESOCKTNOSUPPORT; + if (!capable(CAP_NET_RAW)) + return -EPERM; sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto, kern); if (!sk)