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Date: Thu, 6 Aug 2020 10:28:08 +0800 From: Qingyu Li <ieatmuttonchuan@...il.com> To: davem@...emloft.net, kuba@...nel.org Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH] nfc: enforce CAP_NET_RAW for raw sockets When creating a raw AF_NFC socket, CAP_NET_RAW needs to be checked first. Signed-off-by: Qingyu Li <ieatmuttonchuan@...il.com> --- net/nfc/rawsock.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/net/nfc/rawsock.c b/net/nfc/rawsock.c index ba5ffd3badd3..c1302b689a98 100644 --- a/net/nfc/rawsock.c +++ b/net/nfc/rawsock.c @@ -332,8 +332,11 @@ static int rawsock_create(struct net *net, struct socket *sock, if ((sock->type != SOCK_SEQPACKET) && (sock->type != SOCK_RAW)) return -ESOCKTNOSUPPORT; - if (sock->type == SOCK_RAW) + if (sock->type == SOCK_RAW){ + if (!capable(CAP_NET_RAW)) + return -EPERM; sock->ops = &rawsock_raw_ops; + } else sock->ops = &rawsock_ops;
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