| Description: | In the Linux kernel, the following vulnerability has been resolved:
comedi: vmk80xx: fix transfer-buffer overflows The driver uses
endpoint-sized USB transfer buffers but up until recently had no
sanity checks on the sizes. Commit e1f13c879a7c ("staging: comedi:
check validity of wMaxPacketSize of usb endpoints found")
inadvertently fixed NULL-pointer dereferences when accessing the
transfer buffers in case a malicious device has a zero wMaxPacketSize.
Make sure to allocate buffers large enough to handle also the other
accesses that are done without a size check (e.g. byte 18 in
vmk80xx_cnt_insn_read() for the VMK8061_MODEL) to avoid writing beyond
the buffers, for example, when doing descriptor fuzzing. The original
driver was for a low-speed device with 8-byte buffers. Support was
later added for a device that uses bulk transfers and is presumably a
full-speed device with a maximum 64-byte wMaxPacketSize.
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