From: Eugeniu Rosca <erosca@xxxxxxxxxxxxxx> commit 60e3f6e4ac5b0fda43dad01c32e09409ec710045 upstream. Reviewing a fresh portion of coverity defects in USB core (specifically CID 1458999), Alan Stern noted below in [1]: On Tue, Feb 25, 2020 at 02:39:23PM -0500, Alan Stern wrote: > A revised search finds line 997 in drivers/usb/core/hub.c and lines > 216, 269 in drivers/usb/core/port.c. (I didn't try looking in any > other directories.) AFAICT all three of these should check the > return value, although a error message in the kernel log probably > isn't needed. Factor out the usb_remove_device() change into a standalone patch to allow conflict-free integration on top of the earliest stable branches. [1] https://lore.kernel.org/lkml/Pine.LNX.4.44L0.2002251419120.1485-100000@xxxxxxxxxxxxxxxxxxxx Fixes: 253e05724f9230 ("USB: add a "remove hardware" sysfs attribute") Cc: stable@xxxxxxxxxxxxxxx # v2.6.33+ Suggested-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Eugeniu Rosca <erosca@xxxxxxxxxxxxxx> Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20200226175036.14946-2-erosca@xxxxxxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/usb/core/hub.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -954,13 +954,17 @@ int usb_remove_device(struct usb_device { struct usb_hub *hub; struct usb_interface *intf; + int ret; if (!udev->parent) /* Can't remove a root hub */ return -EINVAL; hub = usb_hub_to_struct_hub(udev->parent); intf = to_usb_interface(hub->intfdev); - usb_autopm_get_interface(intf); + ret = usb_autopm_get_interface(intf); + if (ret < 0) + return ret; + set_bit(udev->portnum, hub->removed_bits); hub_port_logical_disconnect(hub, udev->portnum); usb_autopm_put_interface(intf);
