| Message ID | 20181004134906.11495-1-oneukum@suse.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | cdc-acm: fix race between reset and control messaging | expand |
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index f9b40a9dc4d3..86e477cd5c48 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -1636,6 +1636,7 @@ static int acm_pre_reset(struct usb_interface *intf) struct acm *acm = usb_get_intfdata(intf); clear_bit(EVENT_RX_STALL, &acm->flags); + acm->nb_index = 0; /* pending control transfers are lost */ return 0; }
If a device splits up a control message and a reset() happens between the parts, the message is lost and already recieved parts must be dropped. Signed-off-by: Oliver Neukum <oneukum@suse.com> Fixes: 1aba579f3cf51 ("cdc-acm: handle read pipe errors") --- drivers/usb/class/cdc-acm.c | 1 + 1 file changed, 1 insertion(+)