From: Oliver Hartkopp socketcan@hartkopp.net
commit b42b3a2744b3e8f427de79896720c72823af91ad upstream.
Initialize the sockaddr_can structure to prevent a data leak to user space.
Suggested-by: Cong Wang xiyou.wangcong@gmail.com Reported-by: syzbot+057884e2f453e8afebc8@syzkaller.appspotmail.com Fixes: e057dd3fc20f ("can: add ISO 15765-2:2016 transport protocol") Signed-off-by: Oliver Hartkopp socketcan@hartkopp.net Link: https://lore.kernel.org/r/20210112091643.11789-1-socketcan@hartkopp.net Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- net/can/isotp.c | 1 + 1 file changed, 1 insertion(+)
--- a/net/can/isotp.c +++ b/net/can/isotp.c @@ -1139,6 +1139,7 @@ static int isotp_getname(struct socket * if (peer) return -EOPNOTSUPP;
+ memset(addr, 0, sizeof(*addr)); addr->can_family = AF_CAN; addr->can_ifindex = so->ifindex; addr->can_addr.tp.rx_id = so->rxid;