can: isotp: isotp_getname(): fix kernel information leak

Initialize the sockaddr_can structure to prevent a data leak to user space. Suggested-by: Cong Wang <[email protected]> Reported-by: [email protected] Fixes: e057dd3 ("can: add ISO 15765-2:2016 transport protocol") Signed-off-by: Oliver Hartkopp <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Marc Kleine-Budde <[email protected]>
nbdd0121 · Jan 13, 2021 · b42b3a2 · b42b3a2
1 parent a95d25d
commit b42b3a2
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/net/can/isotp.c b/net/can/isotp.c
@@ -1155,6 +1155,7 @@ static int isotp_getname(struct socket *sock, struct sockaddr *uaddr, int peer)
 	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;