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KernelTrap: Tainting the Kernel From Userland

May 31, 2006, 11:30 (0 Talkback[s])


Desktop-as-a-Service Designed for Any Cloud ? Nutanix Frame

"Theodore Ts'o proposed a new patch allowing a userland program to taint the kernel by writing to /proc/sys/kernel/tainted, 'to be used when userspace is potentially doing something naughty that might compromise the kernel.' When asked when this would be needed, Theodore went on to explain, 'the problem is that the Real-Time Specification for Java (RTSJ) **requires** that the JVM provide class functions which provide direct access to physical memory; all physical memory. In fact, the RTSJ compliance test explicitly checks for this; it requires that you give the compliance test the address of a few hundred megs of physical memory for the test...'"

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