usb-linux: Ensure devep != 0
So that we don't index endp_table with a negative index. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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@ -1029,6 +1029,11 @@ static int usb_linux_update_endp_table(USBHostDevice *s)
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}
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devep = descriptors[i + 2];
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if ((devep & 0x0f) == 0) {
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fprintf(stderr, "usb-linux: invalid ep descriptor, ep == 0\n");
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return 1;
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}
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switch (descriptors[i + 3] & 0x3) {
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case 0x00:
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type = USBDEVFS_URB_TYPE_CONTROL;
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