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| author | Stéphane Lesimple <speed47_github@speed47.net> | 2018-01-26 14:55:01 +0100 |
|---|---|---|
| committer | Stéphane Lesimple <speed47_github@speed47.net> | 2018-01-26 14:55:01 +0100 |
| commit | 0798bd4c5b8bb712a4f625a13de54b9c2e28a607 (patch) | |
| tree | bfe8096719fe1744e61e4b573cc8ee85cbcd87a0 | |
| parent | 42094c4f8b55fc56d341463bdf2be9aecb9927e1 (diff) | |
| download | spectre-meltdown-checker-0798bd4c5b8bb712a4f625a13de54b9c2e28a607.tar.lz spectre-meltdown-checker-0798bd4c5b8bb712a4f625a13de54b9c2e28a607.tar.xz spectre-meltdown-checker-0798bd4c5b8bb712a4f625a13de54b9c2e28a607.zip | |
fix: report arch_capabilities as NO when no MSR
When the arch_capabilities MSR is not there, it means
that all the features it might advertise can be considered
as NO instead of UNKNOWN
| -rwxr-xr-x | spectre-meltdown-checker.sh | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/spectre-meltdown-checker.sh b/spectre-meltdown-checker.sh index 7b3e7dc..a19d4c3 100755 --- a/spectre-meltdown-checker.sh +++ b/spectre-meltdown-checker.sh @@ -1059,6 +1059,8 @@ check_cpu() if [ "$cpuid_arch_capabilities" = -1 ]; then pstatus yellow UNKNOWN elif [ "$cpuid_arch_capabilities" != 1 ]; then + capabilities_rdcl_no=0 + capabilities_ibrs_all=0 pstatus red NO elif [ ! -e /dev/cpu/0/msr ]; then spec_ctrl_msr=-1 @@ -1068,10 +1070,10 @@ check_cpu() # here we use dd, it's the same as using 'rdmsr 0x10a' but without needing the rdmsr tool # if we get a read error, the MSR is not there. bs has to be 8 for msr capabilities=$(dd if=/dev/cpu/0/msr bs=8 count=1 skip=266 iflag=skip_bytes 2>/dev/null | od -t u1 -A n | awk '{print $8}') + capabilities_rdcl_no=0 + capabilities_ibrs_all=0 if [ $? -eq 0 ]; then _debug "capabilities MSR lower byte is $capabilities (decimal)" - capabilities_rdcl_no=0 - capabilities_ibrs_all=0 [ $(( capabilities & 1 )) -eq 1 ] && capabilities_rdcl_no=1 [ $(( capabilities & 2 )) -eq 2 ] && capabilities_ibrs_all=1 _debug "capabilities says rdcl_no=$capabilities_rdcl_no ibrs_all=$capabilities_ibrs_all" |