[PATCH] NFC: Fix possible NULL ptr deref when getting the name of a socket
From: Sasha Levin
Date: Wed Jun 06 2012 - 17:02:17 EST
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 <levinsasha928@xxxxxxxxx>
---
net/nfc/llcp/sock.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/net/nfc/llcp/sock.c b/net/nfc/llcp/sock.c
index 3f339b1..17a707d 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);
--
1.7.8.6
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/