* [PATCH] net/bluetooth/rfcomm/sock.c: add CAP_NET_RAW check.
@ 2020-08-18 8:33 Qingyu Li
0 siblings, 0 replies; only message in thread
From: Qingyu Li @ 2020-08-18 8:33 UTC (permalink / raw)
To: marcel, johan.hedberg, davem, kuba, matthieu.baerts, stefan,
arnd, gustavoars, bigeasy
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/rfcomm/sock.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c
index ae6f80730561..d67d49e5aa00 100644
--- a/net/bluetooth/rfcomm/sock.c
+++ b/net/bluetooth/rfcomm/sock.c
@@ -321,6 +321,9 @@ static int rfcomm_sock_create(struct net *net, struct socket *sock,
if (sock->type != SOCK_STREAM && sock->type != SOCK_RAW)
return -ESOCKTNOSUPPORT;
+ if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW))
+ return -EPERM;
+
sock->ops = &rfcomm_sock_ops;
sk = rfcomm_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern);
--
2.17.1
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2020-08-18 8:33 [PATCH] net/bluetooth/rfcomm/sock.c: add CAP_NET_RAW check Qingyu Li
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