CVE-2026-46073

In the Linux kernel, the following vulnerability has been resolved:

hwmon: (powerz) Fix missing usbkillurb() on signal interrupt

waitforcompletioninterruptibletimeout() returns -ERESTARTSYS when interrupted. This needs to abort the URB and return an error. No data has been received from the device so any reads from the transfer buffer are invalid.

The original code tests !ret, which only catches the timeout case (0). On signal delivery (-ERESTARTSYS), !ret is false so the function skips usbkillurb() and falls through to read from the unfilled transfer buffer.

Fix by capturing the return value into a long (matching the function return type) and handling signal (negative) and timeout (zero) cases with separate checks that both call usbkillurb() before returning.