* [PATCH] net/nfc/rawsock.c: add CAP_NET_RAW check.
@ 2020-08-10 1:51 Qingyu Li
2020-08-11 17:35 ` David Miller
0 siblings, 1 reply; 2+ messages in thread
From: Qingyu Li @ 2020-08-10 1:51 UTC (permalink / raw)
To: kuba, davem; +Cc: netdev, linux-kernel
When creating a raw AF_NFC socket, CAP_NET_RAW needs to be checked first.
Signed-off-by: Qingyu Li <ieatmuttonchuan@gmail.com>
---
net/nfc/rawsock.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/net/nfc/rawsock.c b/net/nfc/rawsock.c
index ba5ffd3badd3..b5c867fe3232 100644
--- a/net/nfc/rawsock.c
+++ b/net/nfc/rawsock.c
@@ -332,10 +332,13 @@ 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
+ } else {
sock->ops = &rawsock_ops;
+ }
sk = sk_alloc(net, PF_NFC, GFP_ATOMIC, nfc_proto->proto, kern);
if (!sk)
--
2.17.1
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