| Message ID | 20221008211532.74583-1-pchelkin@ispras.ru |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v5] ath9k: verify the expected usb_endpoints are present | expand |
Fedor Pchelkin <pchelkin@ispras.ru> writes: > The bug arises when a USB device claims to be an ATH9K but doesn't > have the expected endpoints. (In this case there was an interrupt > endpoint where the driver expected a bulk endpoint.) The kernel > needs to be able to handle such devices without getting an internal error. > > usb 1-1: BOGUS urb xfer, pipe 3 != type 1 > WARNING: CPU: 3 PID: 500 at drivers/usb/core/urb.c:493 usb_submit_urb+0xce2/0x1430 drivers/usb/core/urb.c:493 > Modules linked in: > CPU: 3 PID: 500 Comm: kworker/3:2 Not tainted 5.10.135-syzkaller #0 > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 > Workqueue: events request_firmware_work_func > RIP: 0010:usb_submit_urb+0xce2/0x1430 drivers/usb/core/urb.c:493 > Call Trace: > ath9k_hif_usb_alloc_rx_urbs drivers/net/wireless/ath/ath9k/hif_usb.c:908 [inline] > ath9k_hif_usb_alloc_urbs+0x75e/0x1010 drivers/net/wireless/ath/ath9k/hif_usb.c:1019 > ath9k_hif_usb_dev_init drivers/net/wireless/ath/ath9k/hif_usb.c:1109 [inline] > ath9k_hif_usb_firmware_cb+0x142/0x530 drivers/net/wireless/ath/ath9k/hif_usb.c:1242 > request_firmware_work_func+0x12e/0x240 drivers/base/firmware_loader/main.c:1097 > process_one_work+0x9af/0x1600 kernel/workqueue.c:2279 > worker_thread+0x61d/0x12f0 kernel/workqueue.c:2425 > kthread+0x3b4/0x4a0 kernel/kthread.c:313 > ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:299 > > Found by Linux Verification Center (linuxtesting.org) with Syzkaller. > > Suggested-by: Alan Stern <stern@rowland.harvard.edu> > Signed-off-by: Fedor Pchelkin <pchelkin@ispras.ru> > Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Acked-by: Toke Høiland-Jørgensen <toke@toke.dk>
diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c index 4d9002a9d082..1ffd6cd5dceb 100644 --- a/drivers/net/wireless/ath/ath9k/hif_usb.c +++ b/drivers/net/wireless/ath/ath9k/hif_usb.c @@ -1329,10 +1329,24 @@ static int send_eject_command(struct usb_interface *interface) static int ath9k_hif_usb_probe(struct usb_interface *interface, const struct usb_device_id *id) { + struct usb_endpoint_descriptor *bulk_in, *bulk_out, *int_in, *int_out; struct usb_device *udev = interface_to_usbdev(interface); + struct usb_host_interface *alt; struct hif_device_usb *hif_dev; int ret = 0; + /* Verify the expected endpoints are present */ + alt = interface->cur_altsetting; + if (usb_find_common_endpoints(alt, &bulk_in, &bulk_out, &int_in, &int_out) < 0 || + usb_endpoint_num(bulk_in) != USB_WLAN_RX_PIPE || + usb_endpoint_num(bulk_out) != USB_WLAN_TX_PIPE || + usb_endpoint_num(int_in) != USB_REG_IN_PIPE || + usb_endpoint_num(int_out) != USB_REG_OUT_PIPE) { + dev_err(&udev->dev, + "ath9k_htc: Device endpoint numbers are not the expected ones\n"); + return -ENODEV; + } + if (id->driver_info == STORAGE_DEVICE) return send_eject_command(interface);