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usb-linux: Ensure devep != 0

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So that we don't index endp_table with a negative index.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Hans de Goede 2011-05-31 11:35:22 +02:00 committed by Gerd Hoffmann
parent 61c1117f08
commit 130314f83d
1 changed files with 5 additions and 0 deletions
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5
usb-linux.c
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@ -1029,6 +1029,11 @@ static int usb_linux_update_endp_table(USBHostDevice *s)
} }
devep = descriptors[i + 2]; devep = descriptors[i + 2];
if ((devep & 0x0f) == 0) {
fprintf(stderr, "usb-linux: invalid ep descriptor, ep == 0\n");
return 1;
}
switch (descriptors[i + 3] & 0x3) { switch (descriptors[i + 3] & 0x3) {
case 0x00: case 0x00:
type = USBDEVFS_URB_TYPE_CONTROL; type = USBDEVFS_URB_TYPE_CONTROL;