From f49bd6510620b9cd434b87bea639f07dfde56f09 Mon Sep 17 00:00:00 2001 From: Ori Nimron <orinimron123@gmail.com> Date: Fri, 20 Sep 2019 09:35:45 +0200 Subject: [PATCH] mISDN: enforce CAP_NET_RAW for raw sockets commit b91ee4aa2a2199ba4d4650706c272985a5a32d80 upstream. 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: Ben Hutchings <ben@decadent.org.uk> --- drivers/isdn/mISDN/socket.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/isdn/mISDN/socket.c b/drivers/isdn/mISDN/socket.c index 1be82284cf9df..be13516660c67 100644 --- a/drivers/isdn/mISDN/socket.c +++ b/drivers/isdn/mISDN/socket.c @@ -763,6 +763,8 @@ base_sock_create(struct net *net, struct socket *sock, int protocol) if (sock->type != SOCK_RAW) return -ESOCKTNOSUPPORT; + if (!capable(CAP_NET_RAW)) + return -EPERM; sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto); if (!sk)