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authorOliver Hartkopp <socketcan@hartkopp.net>2021-01-12 10:16:43 +0100
committerMarc Kleine-Budde <mkl@pengutronix.de>2021-01-13 22:15:13 +0100
commitb42b3a2744b3e8f427de79896720c72823af91ad (patch)
tree43c6f7295a83253c8e9052ae5cda3286ce54bb51 /net
parenta95d25dd7b94a5ba18246da09b4218f132fed60e (diff)
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 <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>
Diffstat (limited to 'net')
-rw-r--r--net/can/isotp.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/can/isotp.c b/net/can/isotp.c
index 7839c3b9e5be..3ef7f78e553b 100644
--- 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;