From 58d1eab7ef1d7ff8e448699dfd1a21b7f3303296 Mon Sep 17 00:00:00 2001 From: Sasha Levin Date: Wed, 6 Jun 2012 23:02:55 +0200 Subject: [PATCH] NFC: Fix possible NULL ptr deref when getting the name of a socket llcp_sock_getname() might get called before the LLCP socket was created. This condition isn't checked, and llcp_sock_getname will simply deref a NULL ptr in that case. This exists starting with d646960 ("NFC: Initial LLCP support"). Signed-off-by: Sasha Levin Signed-off-by: John W. Linville --- net/nfc/llcp/sock.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/nfc/llcp/sock.c b/net/nfc/llcp/sock.c index 3f339b19d140..17a707db40eb 100644 --- a/net/nfc/llcp/sock.c +++ b/net/nfc/llcp/sock.c @@ -292,6 +292,9 @@ static int llcp_sock_getname(struct socket *sock, struct sockaddr *addr, pr_debug("%p\n", sk); + if (llcp_sock == NULL) + return -EBADFD; + addr->sa_family = AF_NFC; *len = sizeof(struct sockaddr_nfc_llcp); -- 2.30.2