[baghira]

According the lwn comments it should be sufficient (and the post by perception-point suggests that it would at least make things more difficult), but I haven't the hardware to test for myself.

[cmurf]

I have Sandy Bridge, i7-2820QM. The exploit code has been running for nearly an hour, still "Increfing..."

EDIT:

    [chris@f23m cve20160728]$ ./cve_2016_0728 PP_KEY
    uid=1000, euid=1000
    Increfing...
    finished increfing
    forking...
    finished forking
    caling revoke...
    uid=1000, euid=1000
    sh-4.3$