CVE-2021-47364

In the Linux kernel, the following vulnerability has been resolved: comedi:
Fix memory leak in compat_insnlist() compat_insnlist() handles the 32-bit
version of the COMEDI_INSNLIST ioctl (whenwhen CONFIG_COMPAT is
enabled). It allocates memory to temporarily hold an array of struct comedi_insn converted from the 32-bit version in user space. This memory
is only being freed if there is a fault while filling the array, otherwise
it is leaked. Add a call to kfree() to fix the leak.