pkg: fix versionStrings out of bound

[chenliTW]

add check to length of versionStrings
fix: #1086

[mtardy]

Thanks a lot for taking the time to submit your patch! It indeed fixes the issue.

However, the code is a little bit harder to understand: an error in the os.ReadFile implies that the len(versionStrings) == 0 will trigger the "error path" with the else statement. But it's correct! Thanks

[kkourt]

Thanks for the patch!

Could you please fix the static warning?
You can just run goimports -w pkg/kernels/kernels.go and then fold the change into your patch, and push again.

I've run it on my machine, and this is the resulting diff (it's just a whitespace change) if you want to do it manualy:

index 1e689712..2df7c419 100644
--- a/pkg/kernels/kernels.go
+++ b/pkg/kernels/kernels.go
@@ -65,7 +65,7 @@ func GetKernelVersion(kernelVersion, procfs string) (int, string, error) {
                if versionSig, err := os.ReadFile(procfs + "/version_signature"); err == nil {
                        versionStrings = strings.Fields(string(versionSig))
                }
-               
+
                if len(versionStrings) > 0 {
                        version = int(KernelStringToNumeric(versionStrings[len(versionStrings)-1]))
                        verStr = versionStrings[len(versionStrings)-1]

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[kkourt]

Thank you!

[mtardy]

Thanks a lot @chenliTW

[chenliTW]

Thank you!

Thanks