From: Rustam Kovhaev <[email protected]> [ Upstream commit e911e99a0770f760377c263bc7bac1b1593c6147 ]
in case of an error tty_register_device_attr() returns ERR_PTR(), add IS_ERR() check Reported-and-tested-by: [email protected] Link: https://syzkaller.appspot.com/bug?extid=67b2bd0e34f952d0321e Signed-off-by: Rustam Kovhaev <[email protected]> Reviewed-by: Greg Kroah-Hartman <[email protected]> Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Sasha Levin <[email protected]> --- 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 61b9d33681484..bff268b4a9a46 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; } -- 2.25.1
