Comment 327 for bug 1667750

(In reply to Michael from comment #164)
> patch v2 causes monitor mode to crash (on ioctl() system calls:
>
> [ 602.100650] usb 1-2: BOGUS urb flags, 208 --> 200
> [ 602.100691] WARNING: CPU: 10 PID: 15060 at drivers/usb/core/urb.c:517
> usb_submit_urb+0x1c9/0x5e0
[snip]
> [ 602.100879] CPU: 10 PID: 15060 Comm: hcxdumptool Tainted: P W OE
> 5.10.9-arch1-1 #1

Those are same "BOGUS urb flags" messages like reported before by Bernhard. I think you did not correctly apply v2 patch on top of 5.10. Please double check if this hunk is present on your backported patch:

diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c
index 357b149b20d3..140bac59dc32 100644
--- a/drivers/usb/core/urb.c
+++ b/drivers/usb/core/urb.c
@@ -495,7 +495,7 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)

        /* Check against a simple/standard policy */
        allowed = (URB_NO_TRANSFER_DMA_MAP | URB_NO_INTERRUPT | URB_DIR_MASK |
- URB_FREE_BUFFER);
+ URB_SOFT_RETRY_NOT_OK | URB_FREE_BUFFER);
        switch (xfertype) {
        case USB_ENDPOINT_XFER_BULK:
        case USB_ENDPOINT_XFER_INT: