linux_dsm_epyc7002/drivers/usb/usbip
Suwan Kim aabb5b8338 usbip: Fix error path of vhci_recv_ret_submit()
If a transaction error happens in vhci_recv_ret_submit(), event
handler closes connection and changes port status to kick hub_event.
Then hub tries to flush the endpoint URBs, but that causes infinite
loop between usb_hub_flush_endpoint() and vhci_urb_dequeue() because
"vhci_priv" in vhci_urb_dequeue() was already released by
vhci_recv_ret_submit() before a transmission error occurred. Thus,
vhci_urb_dequeue() terminates early and usb_hub_flush_endpoint()
continuously calls vhci_urb_dequeue().

The root cause of this issue is that vhci_recv_ret_submit()
terminates early without giving back URB when transaction error
occurs in vhci_recv_ret_submit(). That causes the error URB to still
be linked at endpoint list without “vhci_priv".

So, in the case of transaction error in vhci_recv_ret_submit(),
unlink URB from the endpoint, insert proper error code in
urb->status and give back URB.

Reported-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Tested-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Signed-off-by: Suwan Kim <suwan.kim027@gmail.com>
Cc: stable <stable@vger.kernel.org>
Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Link: https://lore.kernel.org/r/20191213023055.19933-3-suwan.kim027@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-12-17 16:36:33 +01:00
..
Kconfig USBIP: add config dependency for SGL_ALLOC 2019-11-12 18:19:22 +01:00
Makefile
stub_dev.c USB: usbip: convert to use dev_groups 2019-08-09 07:55:45 +02:00
stub_main.c usbip: Implement SG support to vhci-hcd and stub driver 2019-09-03 16:00:38 +02:00
stub_rx.c usbip: Fix uninitialized symbol 'nents' in stub_recv_cmd_submit() 2019-11-13 18:53:11 +08:00
stub_tx.c usbip: clean up an indentation issue 2019-10-04 14:09:42 +02:00
stub.h usbip: Implement SG support to vhci-hcd and stub driver 2019-09-03 16:00:38 +02:00
usbip_common.c usbip: Fix receive error in vhci-hcd when using scatter-gather 2019-12-17 16:36:32 +01:00
usbip_common.h usb: usbip: fix isoc packet num validation in get_pipe 2019-04-25 11:11:41 +02:00
usbip_event.c
vhci_hcd.c usbip: vhci_hcd indicate failed message 2019-10-04 11:02:59 +02:00
vhci_rx.c usbip: Fix error path of vhci_recv_ret_submit() 2019-12-17 16:36:33 +01:00
vhci_sysfs.c
vhci_tx.c usbip: Fix free of unallocated memory in vhci tx 2019-10-28 17:51:06 +01:00
vhci.h
vudc_dev.c USB: usbip: convert platform driver to use dev_groups 2019-08-06 09:40:47 +02:00
vudc_main.c USB: usbip: convert platform driver to use dev_groups 2019-08-06 09:40:47 +02:00
vudc_rx.c
vudc_sysfs.c USB: usbip: convert platform driver to use dev_groups 2019-08-06 09:40:47 +02:00
vudc_transfer.c
vudc_tx.c
vudc.h USB: usbip: convert platform driver to use dev_groups 2019-08-06 09:40:47 +02:00