diff options
| -rwxr-xr-x | spectre-meltdown-checker.sh | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/spectre-meltdown-checker.sh b/spectre-meltdown-checker.sh index accdf0d..126c094 100755 --- a/spectre-meltdown-checker.sh +++ b/spectre-meltdown-checker.sh @@ -1,7 +1,7 @@ #! /bin/sh # Spectre & Meltdown checker # Stephane Lesimple -VERSION=0.03 +VERSION=0.04 pstatus() { @@ -164,15 +164,32 @@ fi /bin/echo "* Mitigation 2" /bin/echo -n "* Kernel recompiled with retpolines: " -pstatus yellow UNKNOWN "check not yet implemented" +# XXX this doesn't mean the kernel has been compiled with a retpoline-aware gcc +if [ -e /proc/config.gz ]; then + if zgrep -q '^CONFIG_RETPOLINE=y' /proc/config.gz; then + pstatus green YES + retpoline=1 + else + pstatus red NO + fi +elif [ -e /boot/config-$(uname -r) ]; then + if grep -q '^CONFIG_RETPOLINE=y' /boot/config-$(uname -r); then + pstatus green YES + retpoline=1 + else + pstatus red NO + fi +fi /bin/echo -ne "> \033[46m\033[30mSTATUS:\033[0m " if grep -q AMD /proc/cpuinfo; then pstatus green "NOT VULNERABLE" "your CPU is not vulnerable as per the vendor" elif [ "$ibrs_enabled" = 1 -o "$ibrs_enabled" = 2 ]; then pstatus green "NOT VULNERABLE" "IBRS mitigates the vulnerability" +elif [ "$retpoline" = 1 ]; then + pstatus green "NOT VULNERABLE" "retpolines mitigate the vulnerability" else - pstatus red VULNERABLE "IBRS hardware + kernel support OR retpolines-compiled kernel are needed to mitigate the vulnerability" + pstatus red VULNERABLE "IBRS hardware + kernel support OR kernel with retpolines kernel are needed to mitigate the vulnerability" fi # MELTDOWN |