# \[PATCH\] net/bluetooth/cmtp/sock.c: add CAP\_NET\_RAW check.

- Subsystems: BLUETOOTH SUBSYSTEM, THE REST
- Maintainers: Marcel Holtmann, Luiz Augusto von Dentz, Linus Torvalds
- List: linux-bluetooth
- 2 messages, 2 authors
- Page: https://ratatoskr.run/linux-bluetooth/2020/08/6072421/t

## \[PATCH\] net/bluetooth/cmtp/sock.c: add CAP\_NET\_RAW check.

- From: Qingyu Li \<hidden\>
- Date: 2020-08-18 08:16:01 
- Message: https://ratatoskr.run/linux-bluetooth/2020/08/6072421.md

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

Signed-off-by: Qingyu Li <redacted>
---
 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

```

## Re: \[PATCH\] net/bluetooth/cmtp/sock.c: add CAP\_NET\_RAW check.

- From: Jesse Brandeburg \<hidden\>
- Date: 2020-08-18 18:30:56 
- Message: https://ratatoskr.run/linux-bluetooth/2020/08/6073188.md

```text
On Tue, 18 Aug 2020 16:15:55 +0800
Qingyu Li [ref] wrote:

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

Please see my previous replies.
```