Am Donnerstag, 18. Mai 2006 20:33 schrieb Micah Dowty:
> 3. Isochronous transfers had a higher arbitrary buffer size
> limit than bulk/interrupt transfers. Isochronous transfers
> now use MAX_USBFS_BUFFER_SIZE, which has been raised to 32K.
> These limits are in place not to enforce the USB spec, but
> to prevent userspace applications from abusing kmalloc().
> We might as well allow all transfers access to the higher
> 32K limit, since it was already possible for a malicious
> userspace app to allocate 32K at a time using isochronous
> URBs.
If you allow exactly 32768 the management information for kmalloc will
need additional space pushing the allocation to 64K.
Regards
Oliver
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