invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation

[kbroughton]

Deploying following the readme as a kubernetes job the following error occurred

time="2021-10-27T17:48:18Z" level=debug msg="connecting to xds" addr="10.x.y.z:15010"
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x28 pc=0x1417e72]

goroutine 1 [running]:
github.com/praetorian-inc/snowcat/pkg/xds.(*Client).Version(0xc0005df2d8, {0x19806f0, 0xc00013c020})
github.com/praetorian-inc/snowcat/pkg/xds/client.go:169 +0xd2
github.com/praetorian-inc/snowcat/pkg/xds.NewClient({0xc0005df2d8, 0x12})
github.com/praetorian-inc/snowcat/pkg/xds/client.go:64 +0x173
github.com/praetorian-inc/snowcat/pkg/runner/istiod.hasDiscoveryService({0xc000bdc4d0, 0xc00004ab80})
github.com/praetorian-inc/snowcat/pkg/runner/istiod/istiod.go:77 +0x37
github.com/praetorian-inc/snowcat/pkg/runner/istiod.isDebugIstiod({0xc000bdc4d0, 0x19806f0})
github.com/praetorian-inc/snowcat/pkg/runner/istiod/istiod.go:94 +0x2d
github.com/praetorian-inc/snowcat/pkg/runner/istiod.(*kubeletStrategy).Run(0xc0001de540, 0xc000382660)
github.com/praetorian-inc/snowcat/pkg/runner/istiod/istiod.go:138 +0xd65
github.com/praetorian-inc/snowcat/pkg/runner.(*Runner).Run(0xc000bee2d0, 0x0)
github.com/praetorian-inc/snowcat/pkg/runner/runner.go:74 +0x287
github.com/praetorian-inc/snowcat/pkg/runner.Runners.Run({0xc000bef450, 0x3, 0xc0006bf3f8}, 0xc000382660, 0x0)
github.com/praetorian-inc/snowcat/pkg/runner/runner.go:94 +0x12e7
github.com/praetorian-inc/snowcat/pkg/cli.RunSnowcat({0xc00054c0f0, 0x0, 0x0})
github.com/praetorian-inc/snowcat/pkg/cli/root.go:232 +0x2ab
github.com/praetorian-inc/snowcat/pkg/cli.glob..func2(0x264bde0, {0xc00054c0f0, 0x5, 0x5})
github.com/praetorian-inc/snowcat/pkg/cli/root.go:95 +0x27
github.com/spf13/cobra.(*Command).execute(0x264bde0, {0xc000138130, 0x5, 0x5})
github.com/spf13/cobra@v1.2.1/command.go:860 +0x5f8
github.com/spf13/cobra.(*Command).ExecuteC(0x264bde0)
github.com/spf13/cobra@v1.2.1/command.go:974 +0x3bc
github.com/spf13/cobra.(*Command).Execute(...)
github.com/spf13/cobra@v1.2.1/command.go:902
github.com/praetorian-inc/snowcat/pkg/cli.Execute()
github.com/praetorian-inc/snowcat/pkg/cli/root.go:187 +0x35
main.main()
github.com/praetorian-inc/snowcat/cmd/snowcat/main.go:24 +0x17

[dkaman]

Hey Kesten, do you mind giving us some more info on the cluster? Is it managed?

[kbroughton]

yes, managed GKE.
Client Version: version.Info{Major:"1", Minor:"21", GitVersion:"v1.21.3", GitCommit:"ca643a4d1f7bfe34773c74f79527be4afd95bf39", GitTreeState:"clean", BuildDate:"2021-07-15T21:04:39Z", GoVersion:"go1.16.6", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"19+", GitVersion:"v1.19.14-gke.1900", GitCommit:"abc4e63ae76afef74b341d2dba1892471781604f", GitTreeState:"clean", BuildDate:"2021-09-07T09:21:04Z", GoVersion:"go1.15.15b5", Compiler:"gc", Platform:"linux/amd64"}
WARNING: version difference between client (1.21) and server (1.19) exceeds the supported minor version skew of +/-1