[PATCH] net/nfc/rawsock.c: fix a permission check bug

From: Jeimon <redacted>

The function rawsock_create() calls a privileged function sk_alloc(), which requires a ns-aware check to check net->user_ns, i.e., ns_capable(). However, the original code checks the init_user_ns using capable(). So we replace the capable() with ns_capable().

Signed-off-by: Jeimon <redacted>
---
 net/nfc/rawsock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/nfc/rawsock.c b/net/nfc/rawsock.c
index 955c195ae..a76b62f55 100644
--- a/net/nfc/rawsock.c
+++ b/net/nfc/rawsock.c

@@ -329,7 +329,7 @@ static int rawsock_create(struct net *net, struct socket *sock,
 		return -ESOCKTNOSUPPORT;
 
 	if (sock->type == SOCK_RAW) {
-		if (!capable(CAP_NET_RAW))
+		if (!ns_capable(net->user_ns, CAP_NET_RAW))
 			return -EPERM;
 		sock->ops = &rawsock_raw_ops;
 	} else {

-- 
2.17.1

Hello:

This patch was applied to netdev/net.git (refs/heads/master):

On Sat,  8 May 2021 11:52:30 +0800 you wrote:

From: Jeimon <redacted>

The function rawsock_create() calls a privileged function sk_alloc(), which requires a ns-aware check to check net->user_ns, i.e., ns_capable(). However, the original code checks the init_user_ns using capable(). So we replace the capable() with ns_capable().

Signed-off-by: Jeimon <redacted>
---
 net/nfc/rawsock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Here is the summary with links:
  - net/nfc/rawsock.c: fix a permission check bug
    https://git.kernel.org/netdev/net/c/8ab78863e9ef

You are awesome, thank you!
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