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    SubjectRe: [kernel-hardening] [RFC V2 0/6] add more kernel pointer filter options
    On Sun, Oct 01, 2017 at 11:06:44AM +1100, Tobin C. Harding wrote:
    > Version 2 of Greg's patch series with changes made as suggested by comments to V1.

    Patch set tested by setting /proc/sys/kernel/kptr_restrict and inserting the following module

    #include <linux/init.h>
    #include <linux/module.h>

    #define DRIVER_AUTHOR "Tobin C. Harding <me@tobin.cc>"
    #define DRIVER_DESC "Testing module"

    static void test_printk(void)
    {
    char *ptr = "";

    pr_alert("printing with p: %p\n", ptr);
    pr_alert("printing with pK: %pK\n", ptr);
    pr_alert("printing with pP: %pP\n", ptr);

    pr_alert("printing with pa: %pa\n", ptr);
    pr_alert("printing with pad: %pad\n", ptr);
    pr_alert("printing with pap: %pap\n", ptr);

    pr_alert("printing with paP: %paP\n", ptr);
    pr_alert("printing with padP: %padP\n", ptr);
    pr_alert("printing with papP: %papP\n", ptr);

    pr_alert("printing with pr: %pr\n", ptr);
    pr_alert("printing with pR: %pR\n", ptr);
    }

    static int hello_init(void)
    {
    pr_alert("Hello, world\n");

    test_printk();

    return 0;
    }
    module_init(hello_init);

    static void hello_exit(void)
    {
    pr_alert("Goodbye, world\n");
    }
    module_exit(hello_exit);

    MODULE_DESCRIPTION(DRIVER_DESC);
    MODULE_AUTHOR(DRIVER_AUTHOR);
    MODULE_LICENSE("GPL");

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      Last update: 2017-10-01 02:12    [W:4.073 / U:0.048 seconds]
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