peter/spectre-meltdown-checker
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fix(bsd): load vmm if not already loaded, fixes #274

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As we read sysctl values under the vmm hierarchy, the modules needs to be loaded,
so if not already done, we load it before testing for CVE-2018-3620 and CVE-2018-3646
This commit is contained in:
Stéphane Lesimple 2019-04-19 19:47:04 +02:00
parent fc4981bb94
commit 23e7db044e
1 changed files with 7 additions and 0 deletions
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7
spectre-meltdown-checker.sh
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@ -27,6 +27,7 @@ exit_cleanup()
[ "$insmod_cpuid" = 1 ] && rmmod cpuid 2>/dev/null
[ "$insmod_msr" = 1 ] && rmmod msr 2>/dev/null
[ "$kldload_cpuctl" = 1 ] && kldunload cpuctl 2>/dev/null
[ "$kldload_vmm" = 1 ] && kldunload vmm 2>/dev/null
}
# if we were git clone'd, adjust VERSION
@ -3741,6 +3742,12 @@ check_CVE_2018_3620_linux()
check_CVE_2018_3620_bsd()
{
_info_nol "* Kernel reserved the memory page at physical address 0x0: "
if ! kldstat -q -m vmm; then
kldload vmm 2>/dev/null && kldload_vmm=1
_debug "attempted to load module vmm, kldload_vmm=$kldload_vmm"
else
_debug "vmm module already loaded"
fi
if sysctl hw.vmm.vmx.l1d_flush >/dev/null 2>&1; then
# https://security.FreeBSD.org/patches/SA-18:09/l1tf-11.2.patch
# this is very difficult to detect that the kernel reserved the 0 page, but this fix