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NFC: Fix possible NULL ptr deref when getting the name of a socket

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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@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Sasha Levin 2012-06-06 23:02:55 +02:00 committed by John W. Linville
parent d012d04e4d
commit 58d1eab7ef
1 changed files with 3 additions and 0 deletions
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3
net/nfc/llcp/sock.c
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@ -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);