LinuxQuestions.org - meltdown proof of concept (official)

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- - meltdown proof of concept (official) - does it work? (https://www.linuxquestions.org/questions/linux-security-4/meltdown-proof-of-concept-official-does-it-work-4175621520/)

clavisound

01-12-2018 07:03 PM

meltdown proof of concept (official) - does it work?

Here is the official proof of concept (pof) code, for meltdown as linked from the official page.

In my testing the testing fails. Kernel 4.4.xx.

If you have kernel earlier tha 4.12 those are some testing commands

Code:

taskset 0x1 ./reliability # <- in my case 0% success

and

Code:

./memory_filler 9 # <-- 9 = 9GiB! Be carefull, not more that your free memory, or the machine will be very slow.

#in another terminal as root.

taskset 0x1 ./memdump

Does it work on your cpu?

clavisound

01-12-2018 07:47 PM

I just found a similar thread.

I have better success (some random characters, not the text in question) only once and with this flag because I have old processor.

Code:

make clean; CFLAGS='-DNORDTSCP' make

I also have 32-bit processor and it does not compiles.

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