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* [PATCH] net/bluetooth/cmtp/sock.c: add CAP_NET_RAW check.
@ 2020-08-18  8:15 Qingyu Li
  2020-08-18 18:30 ` Jesse Brandeburg
  0 siblings, 1 reply; 2+ messages in thread
From: Qingyu Li @ 2020-08-18  8:15 UTC (permalink / raw)
  To: marcel, johan.hedberg, davem, kuba, isdn
  Cc: linux-bluetooth, netdev, linux-kernel

When creating a raw PF_BLUETOOTH socket,
CAP_NET_RAW needs to be checked first.

Signed-off-by: Qingyu Li <ieatmuttonchuan@gmail.com>
---
 net/bluetooth/cmtp/sock.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/bluetooth/cmtp/sock.c b/net/bluetooth/cmtp/sock.c
index 96d49d9fae96..476ccc9bee7c 100644
--- a/net/bluetooth/cmtp/sock.c
+++ b/net/bluetooth/cmtp/sock.c
@@ -207,6 +207,9 @@ static int cmtp_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_BLUETOOTH, GFP_ATOMIC, &cmtp_proto, kern);
 	if (!sk)
 		return -ENOMEM;
--
2.17.1


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2020-08-18  8:15 [PATCH] net/bluetooth/cmtp/sock.c: add CAP_NET_RAW check Qingyu Li
2020-08-18 18:30 ` Jesse Brandeburg

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