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spectre-meltdown-checker
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Correct aarch64 KPTI dmesg message 

As it's seen in unmap_kernel_at_el0 (both the function definition
and its usage in arm64_features[]) from arch/arm64/kernel/cpufeature.c
the kernel reports this string:

CPU features: detected: Kernel page table isolation (KPTI)

or (before commit e0f6429dc1c0 ("arm64: cpufeature: Remove redundant "feature"
in reports")):

CPU features: detected feature: Kernel page table isolation (KPTI)

if KPTI is enabled on the system.

So on let's adjust check_variant3_linux() to make it grep these
strings if executed on an aarch64 platform.

Tested on a Cavium ThunderX2 machine.

Signed-off-by: Stanislav Kholmanskikh <stanislav.kholmanskikh@oracle.com>
This commit is contained in:
Stanislav Kholmanskikh 2018-08-29 05:40:52 -07:00 committed by Stéphane Lesimple
parent 55120839dd
commit 401ccd4b14
1 changed files with 2 additions and 0 deletions
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spectre-meltdown-checker.sh
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@ -3237,6 +3237,8 @@ check_CVE_2017_5754_linux()
dmesg_grep="Kernel/User page tables isolation: enabled"
dmesg_grep="$dmesg_grep|Kernel page table isolation enabled"
dmesg_grep="$dmesg_grep|x86/pti: Unmapping kernel while in userspace"
# aarch64
dmesg_grep="$dmesg_grep|CPU features: detected( feature)?: Kernel page table isolation \(KPTI\)"
if grep ^flags "$procfs/cpuinfo" | grep -qw pti; then
# vanilla PTI patch sets the 'pti' flag in cpuinfo
_debug "kpti_enabled: found 'pti' flag in $procfs/cpuinfo"