From: Rustam Kovhaev rkovhaev@gmail.com
[ Upstream commit e911e99a0770f760377c263bc7bac1b1593c6147 ]
in case of an error tty_register_device_attr() returns ERR_PTR(), add IS_ERR() check
Reported-and-tested-by: syzbot+67b2bd0e34f952d0321e@syzkaller.appspotmail.com Link: https://syzkaller.appspot.com/bug?extid=67b2bd0e34f952d0321e Signed-off-by: Rustam Kovhaev rkovhaev@gmail.com Reviewed-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/usb/hso.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c index 61b9d3368148..bff268b4a9a4 100644 --- a/drivers/net/usb/hso.c +++ b/drivers/net/usb/hso.c @@ -2274,12 +2274,14 @@ static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
minor = get_free_serial_index(); if (minor < 0) - goto exit; + goto exit2;
/* register our minor number */ serial->parent->dev = tty_port_register_device_attr(&serial->port, tty_drv, minor, &serial->parent->interface->dev, serial->parent, hso_serial_dev_groups); + if (IS_ERR(serial->parent->dev)) + goto exit2;
/* fill in specific data for later use */ serial->minor = minor; @@ -2324,6 +2326,7 @@ static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, return 0; exit: hso_serial_tty_unregister(serial); +exit2: hso_serial_common_free(serial); return -1; }