-stable review patch. If anyone has any objections, please let us know.
------------------
From: Alan Stern <[email protected]>
This patch (as950) fixes a bug in the cdc-acm driver. It doesn't keep
track of which interface (control or data) the sysfs attributes get
registered for, and as a result, during disconnect it will sometimes
attempt to remove the attributes from the wrong interface. The
left-over attributes can cause a crash later on, particularly if the driver
module has been unloaded.
Signed-off-by: Alan Stern <[email protected]>
Acked-by: Oliver Neukum <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/usb/class/cdc-acm.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -900,6 +900,10 @@ next_desc:
return -ENODEV;
}
}
+
+ /* Accept probe requests only for the control interface */
+ if (intf != control_interface)
+ return -ENODEV;
if (data_interface_num != call_interface_num)
dev_dbg(&intf->dev,"Seperate call control interface. That is not fully supported.");
--
-
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