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reflect: unexpected fault address 0x0 #68355

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shaj13 opened this issue Jul 9, 2024 · 8 comments
Closed

reflect: unexpected fault address 0x0 #68355

shaj13 opened this issue Jul 9, 2024 · 8 comments
Labels
compiler/runtime Issues related to the Go compiler and/or runtime. WaitingForInfo Issue is not actionable because of missing required information, which needs to be provided.

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@shaj13
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shaj13 commented Jul 9, 2024

Go version

go version go1.22.1 linux/amd64

Output of go env in your module/workspace:

GO111MODULE=''
GOARCH='amd64'
GOBIN=''
GOCACHE='/root/.cache/go-build'
GOENV='/root/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMODCACHE='/go/pkg/mod'
GONOPROXY='<internal>'
GONOSUMDB='<internal>'
GOOS='linux'
GOPATH='/go'
GOPRIVATE='<internal>'
GOPROXY='<internal>'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.22.1'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='gcc'
CXX='g++'
CGO_ENABLED='1'
GOMOD='/dev/null'
GOWORK=''
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build1448936908=/tmp/go-build -gno-record-gcc-switches'

What did you do?

Two months ago, we upgraded from 1.21 to 1.22.1. Today, we received an incident report about a panic. Upon reviewing the logs, we found that it originated from the reflect package due to a fault address. The issue occurs when a Kubernetes object is passed to the apimachinery unstructured, which uses reflection behind the scenes.

import (
	v1 "k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
	"k8s.io/apimachinery/pkg/runtime"
	v1beta1 "k8s.io/metrics/pkg/apis/metrics/v1beta1"
)

	if err := runtime.
		DefaultUnstructuredConverter.
		FromUnstructured(
			u.UnstructuredContent(),
			v,
		); err != nil {
		return nil, err
	}

The UnstructuredContent() never returns nil
image

What did you see happen?

2024-07-08T14:12:49.881927297Z unexpected fault address 0x0
2024-07-08T14:12:49.881958704Z fatal error: fault
2024-07-08T14:12:49.886359489Z [signal SIGSEGV: segmentation violation code=0x80 addr=0x0 pc=0x4c7ec5]
2024-07-08T14:12:49.886370829Z 
2024-07-08T14:12:49.886377957Z goroutine 130 gp=0xc000254fc0 m=6 mp=0xc00049a008 [running]:
2024-07-08T14:12:49.886383321Z runtime.throw({0x1c1dcd6?, 0xc003082750?})
2024-07-08T14:12:49.886388154Z 	/usr/local/go/src/runtime/panic.go:1023 +0x5c fp=0xc002af8978 sp=0xc002af8948 pc=0x43d39c
2024-07-08T14:12:49.886392280Z runtime.sigpanic()
2024-07-08T14:12:49.886395705Z 	/usr/local/go/src/runtime/signal_unix.go:895 +0x285 fp=0xc002af89d8 sp=0xc002af8978 pc=0x455f25
2024-07-08T14:12:49.886398845Z internal/abi.(*Type).HasName(...)
2024-07-08T14:12:49.886402324Z 	/usr/local/go/src/internal/abi/type.go:172
2024-07-08T14:12:49.886405359Z reflect.directlyAssignable(0x10?, 0x1ed8308?)
2024-07-08T14:12:49.886409097Z 	/usr/local/go/src/reflect/type.go:1386 +0x25 fp=0xc002af8a00 sp=0xc002af89d8 pc=0x4c7ec5
2024-07-08T14:12:49.886413876Z reflect.Value.assignTo({0x6ff0040c6013c00?, 0x1e0a1d001e0a8165?, 0xc00375b2d0?}, {0x1c3588f, 0x16}, 0x18988c0, 0x0)
2024-07-08T14:12:49.886417160Z 	/usr/local/go/src/reflect/value.go:3329 +0x98 fp=0xc002af8aa8 sp=0xc002af8a00 pc=0x4dccd8
2024-07-08T14:12:49.886420354Z reflect.Value.MapIndex({0x197b5e0?, 0xc003ec9860?, 0x13?}, {0x6ff0040c6013c00, 0x1e0a1d001e0a8165, 0xf745010013801c00})
2024-07-08T14:12:49.886423642Z 	/usr/local/go/src/reflect/value.go:1821 +0xe8 fp=0xc002af8b18 sp=0xc002af8aa8 pc=0x4d7728
2024-07-08T14:12:49.886428433Z k8s.io/apimachinery/pkg/runtime.structFromUnstructured({0x197b5e0?, 0xc003ec9860?, 0x7f1b79762d98?}, {0x1bd1820?, 0xc003082600?, 0x41a2f8?}, 0xc002af9778)
2024-07-08T14:12:49.886442321Z 	vendor/k8s.io/apimachinery/pkg/runtime/converter.go:546 +0x49c fp=0xc002af8c80 sp=0xc002af8b18 pc=0xc7c5bc
2024-07-08T14:12:49.886447122Z k8s.io/apimachinery/pkg/runtime.fromUnstructured({0x1951ce0?, 0xc0047ccfb0?, 0x1?}, {0x1bd1820?, 0xc003082600?, 0xc66e9a?}, 0xc002af9778)
2024-07-08T14:12:49.886450668Z 	vendor/k8s.io/apimachinery/pkg/runtime/converter.go:359 +0x3cf fp=0xc002af8de8 sp=0xc002af8c80 pc=0xc79daf
2024-07-08T14:12:49.886454051Z k8s.io/apimachinery/pkg/runtime.sliceFromUnstructured({0x186eec0?, 0xc0035f4b40?, 0x411c7b?}, {0x18755e0?, 0xc004318140?, 0xc002de2e10?}, 0xc002af9778)
2024-07-08T14:12:49.886457313Z 	vendor/k8s.io/apimachinery/pkg/runtime/converter.go:488 +0x8c5 fp=0xc002af8f68 sp=0xc002af8de8 pc=0xc7bc05
2024-07-08T14:12:49.886460485Z k8s.io/apimachinery/pkg/runtime.fromUnstructured({0x186eec0?, 0xc0035f4b40?, 0x2?}, {0x18755e0?, 0xc004318140?, 0x98?}, 0xc002af9778)
2024-07-08T14:12:49.886463787Z 	vendor/k8s.io/apimachinery/pkg/runtime/converter.go:355 +0x412 fp=0xc002af90d0 sp=0xc002af8f68 pc=0xc79df2
2024-07-08T14:12:49.886466748Z k8s.io/apimachinery/pkg/runtime.structFromUnstructured({0x197b5e0?, 0xc003ec9710?, 0x411c7b?}, {0x1c03220?, 0xc004318110?, 0xc002de2e10?}, 0xc002af9778)
2024-07-08T14:12:49.886469993Z 	vendor/k8s.io/apimachinery/pkg/runtime/converter.go:550 +0x816 fp=0xc002af9238 sp=0xc002af90d0 pc=0xc7c936
2024-07-08T14:12:49.886473076Z k8s.io/apimachinery/pkg/runtime.fromUnstructured({0x197b5e0?, 0xc003ec9710?, 0x2?}, {0x1c03220?, 0xc004318110?, 0x98?}, 0xc002af9778)
2024-07-08T14:12:49.886476340Z 	vendor/k8s.io/apimachinery/pkg/runtime/converter.go:359 +0x3cf fp=0xc002af93a0 sp=0xc002af9238 pc=0xc79daf
2024-07-08T14:12:49.886479386Z k8s.io/apimachinery/pkg/runtime.structFromUnstructured({0x197b5e0?, 0xc003ec2270?, 0xc002af9590?}, {0x1ad80a0?, 0xc004318008?, 0xc002af9670?}, 0xc002af9778)
2024-07-08T14:12:49.886482403Z 	vendor/k8s.io/apimachinery/pkg/runtime/converter.go:550 +0x816 fp=0xc002af9508 sp=0xc002af93a0 pc=0xc7c936
2024-07-08T14:12:49.886508041Z k8s.io/apimachinery/pkg/runtime.fromUnstructured({0x197b5e0?, 0xc003ec2270?, 0x0?}, {0x1ad80a0?, 0xc004318008?, 0x630b4?}, 0xc002af9778)
2024-07-08T14:12:49.886513850Z 	vendor/k8s.io/apimachinery/pkg/runtime/converter.go:359 +0x3cf fp=0xc002af9670 sp=0xc002af9508 pc=0xc79daf
2024-07-08T14:12:49.886517216Z k8s.io/apimachinery/pkg/runtime.(*unstructuredConverter).FromUnstructuredWithValidation(0x2ce5e60, 0xc003ec2270, {0x1be1140, 0xc004318008}, 0x0)
2024-07-08T14:12:49.886520437Z 	vendor/k8s.io/apimachinery/pkg/runtime/converter.go:247 +0x290 fp=0xc002af9800 sp=0xc002af9670 pc=0xc793b0
2024-07-08T14:12:49.886523599Z k8s.io/apimachinery/pkg/runtime.(*unstructuredConverter).FromUnstructured(...)
2024-07-08T14:12:49.886528439Z 	vendor/k8s.io/apimachinery/pkg/runtime/converter.go:274

What did you expect to see?

reflect package does not panic.
@gopherbot gopherbot added the compiler/runtime Issues related to the Go compiler and/or runtime. label Jul 9, 2024
@gabyhelp
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gabyhelp commented Jul 9, 2024

Related Issues and Documentation

(Emoji vote if this was helpful or unhelpful; more detailed feedback welcome in this discussion.)

@seankhliao
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Is this reproducible? or memory corruption on your machine?

@seankhliao seankhliao added the WaitingForInfo Issue is not actionable because of missing required information, which needs to be provided. label Jul 9, 2024
@shaj13
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shaj13 commented Jul 9, 2024 •
edited
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@seankhliao

What do you mean by memory corruption on your machine? I haven't been able to reproduce it, but the panic indicates it's coming from the reflect package. FYI This is happening on VMware ESXi.

@seankhliao seankhliao added WaitingForInfo Issue is not actionable because of missing required information, which needs to be provided. and removed WaitingForInfo Issue is not actionable because of missing required information, which needs to be provided. labels Jul 10, 2024
@ianlancetaylor
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The question is whether this could be due to memory corruption on the machine on which the program was running.

@shaj13
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shaj13 commented Jul 10, 2024 •
edited
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The question is whether this could be due to memory corruption on the machine on which the program was running.

I don't believe there is memory corruption (but not certain).

FYI, Env is a Kubernetes cluster running on VMware ESXi, with most pods running Go 1.21. We upgraded this specific program/pod to Go 1.22.1, and that’s when we observed this issue and #64030 (comment). I got the core file Let me know if you need anything specific.

(dlv) bt
 0  0x0000000000479501 in runtime.raise
    at /usr/local/go/src/runtime/sys_linux_amd64.s:154
 1  0x00000000004560e5 in runtime.dieFromSignal
    at /usr/local/go/src/runtime/signal_unix.go:923
 2  0x00000000004567e6 in runtime.sigfwdgo
    at /usr/local/go/src/runtime/signal_unix.go:1128
 3  0x0000000000454d05 in runtime.sigtrampgo
    at /usr/local/go/src/runtime/signal_unix.go:432
 4  0x0000000000479501 in runtime.raise
    at /usr/local/go/src/runtime/sys_linux_amd64.s:153
 5  0x00000000004560e5 in runtime.dieFromSignal
    at /usr/local/go/src/runtime/signal_unix.go:923
 6  0x000000000043d89a in runtime.crash
    at /usr/local/go/src/runtime/signal_unix.go:1005
 7  0x000000000043d89a in runtime.fatalthrow.func1
    at /usr/local/go/src/runtime/panic.go:1203
 8  0x0000000000475e4a in runtime.systemstack
    at /usr/local/go/src/runtime/asm_amd64.s:509
 9  0x0000000000475de8 in runtime.systemstack_switch
    at /usr/local/go/src/runtime/asm_amd64.s:474
10  0x000000000043d7e5 in runtime.fatalthrow
    at /usr/local/go/src/runtime/panic.go:1192
11  0x000000000043d39c in runtime.throw
    at /usr/local/go/src/runtime/panic.go:1023
12  0x0000000000455f25 in runtime.sigpanic
    at /usr/local/go/src/runtime/signal_unix.go:895
13  0x00000000004c7ec5 in reflect.directlyAssignable
    at /usr/local/go/src/reflect/type.go:1386
Sending output to pager...
 0  0x0000000000479501 in runtime.raise
    at /usr/local/go/src/runtime/sys_linux_amd64.s:154
 1  0x00000000004560e5 in runtime.dieFromSignal
    at /usr/local/go/src/runtime/signal_unix.go:923
 2  0x00000000004567e6 in runtime.sigfwdgo
    at /usr/local/go/src/runtime/signal_unix.go:1128
 3  0x0000000000454d05 in runtime.sigtrampgo
    at /usr/local/go/src/runtime/signal_unix.go:432
 4  0x0000000000479501 in runtime.raise
    at /usr/local/go/src/runtime/sys_linux_amd64.s:153
 5  0x00000000004560e5 in runtime.dieFromSignal
    at /usr/local/go/src/runtime/signal_unix.go:923
 6  0x000000000043d89a in runtime.crash
    at /usr/local/go/src/runtime/signal_unix.go:1005
 7  0x000000000043d89a in runtime.fatalthrow.func1
    at /usr/local/go/src/runtime/panic.go:1203
 8  0x0000000000475e4a in runtime.systemstack
    at /usr/local/go/src/runtime/asm_amd64.s:509
 9  0x0000000000475de8 in runtime.systemstack_switch
    at /usr/local/go/src/runtime/asm_amd64.s:474
10  0x000000000043d7e5 in runtime.fatalthrow
    at /usr/local/go/src/runtime/panic.go:1192
11  0x000000000043d39c in runtime.throw
    at /usr/local/go/src/runtime/panic.go:1023
12  0x0000000000455f25 in runtime.sigpanic
    at /usr/local/go/src/runtime/signal_unix.go:895
13  0x00000000004c7ec5 in reflect.directlyAssignable
    at /usr/local/go/src/reflect/type.go:1386
14  0x00000000004dccd8 in reflect.Value.assignTo
    at /usr/local/go/src/reflect/value.go:3329
15  0x00000000004d7728 in reflect.Value.MapIndex
    at /usr/local/go/src/reflect/value.go:1821
16  0x0000000000c7c5bc in k8s.io/apimachinery/pkg/runtime.structFromUnstructured
:546
17  0x0000000000c79daf in k8s.io/apimachinery/pkg/runtime.fromUnstructured
    at vendor/k8s.io/apimachinery/pkg/runtime/converter.go
:359
18  0x0000000000c7bc05 in k8s.io/apimachinery/pkg/runtime.sliceFromUnstructured
    at vendor/k8s.io/apimachinery/pkg/runtime/converter.go
:488
19  0x0000000000c79df2 in k8s.io/apimachinery/pkg/runtime.fromUnstructured
    at vendor/k8s.io/apimachinery/pkg/runtime/converter.go
:355
20  0x0000000000c7c936 in k8s.io/apimachinery/pkg/runtime.structFromUnstructured
    at vendor/k8s.io/apimachinery/pkg/runtime/converter.go
:550
21  0x0000000000c79daf in k8s.io/apimachinery/pkg/runtime.fromUnstructured
    at vendor/k8s.io/apimachinery/pkg/runtime/converter.go
:359
22  0x0000000000c7c936 in k8s.io/apimachinery/pkg/runtime.structFromUnstructured
    at vendor/k8s.io/apimachinery/pkg/runtime/converter.go
:550
23  0x0000000000c79daf in k8s.io/apimachinery/pkg/runtime.fromUnstructured
    at vendor/k8s.io/apimachinery/pkg/runtime/converter.go
:359
24  0x0000000000c793b0 in k8s.io/apimachinery/pkg/runtime.(*unstructuredConverter).FromUnstructuredWithValidat
ion
    at vendor/k8s.io/apimachinery/pkg/runtime/converter.go
:247
25  0x000000000179b635 in k8s.io/apimachinery/pkg/runtime.(*unstructuredConverter).FromUnstructured
    at vendor/k8s.io/apimachinery/pkg/runtime/converter.go
:274

(dlv) frame 24
> runtime.raise() /usr/local/go/src/runtime/sys_linux_amd64.s:154 (PC: 0x479501)
Warning: debugging optimized function
Frame 24: vendor/k8s.io/apimachinery/pkg/runtime/converter.go:247 (PC: c793b0)
(dlv) 
> runtime.raise() /usr/local/go/src/runtime/sys_linux_amd64.s:154 (PC: 0x479501)
Warning: debugging optimized function
Frame 24: vendor/k8s.io/apimachinery/pkg/runtime/converter.go:247 (PC: c793b0)

(dlv) locals
~r0typ_ = (unreadable empty OP stack)
t = reflect.Type(*reflect.rtype) 0xbeef000000000808
value = reflect.Value {typ_: ("*internal/abi.Type")(0x1be1140), ptr: unsafe.Pointer(0xc004318008), flag: 22}
fromUnstructuredContext = (unreadable empty OP stack)

(dlv) args
c = ("*k8s.io/apimachinery/pkg/runtime.unstructuredConverter")(0x2ce5e60)
u = map[string]interface {} [...]
obj = interface {}(*k8s.io/api/core/v1.Pod) 0xbeef000000000608
returnUnknownFields = false
~r0 = (unreadable empty OP stack)

(dlv) print u 
map[string]interface {} [
	"metadata": map[string]interface {} [
		"generateName": *(*interface {})(0xc0037f5dd0), 
		"uid": *(*interface {})(0xc0037f5de0), 
		"labels": *(*interface {})(0xc0037f5df0), 
		"annotations": *(*interface {})(0xc0037f5e00), 
		"managedFields": *(*interface {})(0xc0037f5e10), 
		"name": *(*interface {})(0xc0037f5ee0), 
		"namespace": *(*interface {})(0xc0037f5ef0), 
		"resourceVersion": *(*interface {})(0xc0037f5f00), 
		"creationTimestamp": *(*interface {})(0xc0037f5f10), 
		"ownerReferences": *(*interface {})(0xc0037f5f20), 
	], 
	"spec": map[string]interface {} [
		"volumes": *(*interface {})(0xc003ed2090), 
		"securityContext": *(*interface {})(0xc003ed20a0), 
		"containers": *(*interface {})(0xc003ed21a0), 
		"automountServiceAccountToken": *(*interface {})(0xc003ed21b0), 
		"schedulerName": *(*interface {})(0xc003ed21c0), 
		"tolerations": *(*interface {})(0xc003ed21d0), 
		"restartPolicy": *(*interface {})(0xc003ed22b0), 
		"terminationGracePeriodSeconds": *(*interface {})(0xc003ed22c0), 
		"dnsPolicy": *(*interface {})(0xc003ed22d0), 
		"serviceAccountName": *(*interface {})(0xc003ed22e0), 
		"serviceAccount": *(*interface {})(0xc003ed22f0), 
		"enableServiceLinks": *(*interface {})(0xc003ed2300), 
		"nodeName": *(*interface {})(0xc003ed23c0), 
		"priority": *(*interface {})(0xc003ed23d0), 
		"preemptionPolicy": *(*interface {})(0xc003ed23e0), 
	], 
	"status": map[string]interface {} [
		"conditions": *(*interface {})(0xc00375b950), 
		"startTime": *(*interface {})(0xc00375b960), 
		"containerStatuses": *(*interface {})(0xc00375b970), 
		"qosClass": *(*interface {})(0xc00375b980), 
		"phase": *(*interface {})(0xc00375ba60), 
		"hostIP": *(*interface {})(0xc00375ba70), 
		"hostIPs": *(*interface {})(0xc00375ba80), 
		"podIP": *(*interface {})(0xc00375ba90), 
		"podIPs": *(*interface {})(0xc00375baa0), 
	], 
	"kind": "Pod", 
	"apiVersion": "v1", 
]

(dlv) print obj 
interface {}(*k8s.io/api/core/v1.Pod) *{
	TypeMeta: k8s.io/apimachinery/pkg/apis/meta/v1.TypeMeta {Kind: "Pod", APIVersion: "v1"},
	ObjectMeta: k8s.io/apimachinery/pkg/apis/meta/v1.ObjectMeta {
		Name: "data-store-98975978-5qm6w",
		GenerateName: "data-store-98975978-",
		Namespace: "default",
		SelfLink: "",
		UID: "4f3fa736-728c-4b48-80d8-7d53e04b26b6",
		ResourceVersion: "7662",
		Generation: 0,
		CreationTimestamp: (*"k8s.io/apimachinery/pkg/apis/meta/v1.Time")(0xc004318090),
		DeletionTimestamp: *k8s.io/apimachinery/pkg/apis/meta/v1.Time nil,
		DeletionGracePeriodSeconds: *int64 nil,
		Labels: map[string]string [...],
		Annotations: map[string]string [...],
		OwnerReferences: []k8s.io/apimachinery/pkg/apis/meta/v1.OwnerReference len: 1, cap: 1, [
			(*"k8s.io/apimachinery/pkg/apis/meta/v1.OwnerReference")(0xc00259cb40),
		],
		Finalizers: []string len: 0, cap: 0, nil,
		ManagedFields: []k8s.io/apimachinery/pkg/apis/meta/v1.ManagedFieldsEntry len: 3, cap: 4, [
			(*"k8s.io/apimachinery/pkg/apis/meta/v1.ManagedFieldsEntry")(0xc003082180),
			(*"k8s.io/apimachinery/pkg/apis/meta/v1.ManagedFieldsEntry")(0xc0030821e0),
			(*"k8s.io/apimachinery/pkg/apis/meta/v1.ManagedFieldsEntry")(0xc003082240),
		],},
	Spec: k8s.io/api/core/v1.PodSpec {
		Volumes: []k8s.io/api/core/v1.Volume len: 3, cap: 4, [
			(*"k8s.io/api/core/v1.Volume")(0xc001527408),
			(*"k8s.io/api/core/v1.Volume")(0xc001527500),
			(*"k8s.io/api/core/v1.Volume")(0xc0015275f8),
		],
		InitContainers: []k8s.io/api/core/v1.Container len: 0, cap: 0, nil,
		Containers: []k8s.io/api/core/v1.Container len: 1, cap: 1, [
			(*"k8s.io/api/core/v1.Container")(0xc003082600),
		],
		EphemeralContainers: []k8s.io/api/core/v1.EphemeralContainer len: 0, cap: 0, nil,
		RestartPolicy: "",
		TerminationGracePeriodSeconds: *int64 nil,
		ActiveDeadlineSeconds: *int64 nil,
		DNSPolicy: "",
		NodeSelector: map[string]string nil,
		ServiceAccountName: "",
		DeprecatedServiceAccount: "",
		AutomountServiceAccountToken: *bool nil,
		NodeName: "",
		HostNetwork: false,
		HostPID: false,
		HostIPC: false,
		ShareProcessNamespace: *bool nil,
		SecurityContext: *k8s.io/api/core/v1.PodSecurityContext nil,
		ImagePullSecrets: []k8s.io/api/core/v1.LocalObjectReference len: 0, cap: 0, nil,
		Hostname: "",
		Subdomain: "",
		Affinity: *k8s.io/api/core/v1.Affinity nil,
		SchedulerName: "",
		Tolerations: []k8s.io/api/core/v1.Toleration len: 0, cap: 0, nil,
		HostAliases: []k8s.io/api/core/v1.HostAlias len: 0, cap: 0, nil,
		PriorityClassName: "",
		Priority: *int32 nil,
		DNSConfig: *k8s.io/api/core/v1.PodDNSConfig nil,
		ReadinessGates: []k8s.io/api/core/v1.PodReadinessGate len: 0, cap: 0, nil,
		RuntimeClassName: *string nil,
		EnableServiceLinks: *bool nil,
		PreemptionPolicy: *k8s.io/api/core/v1.PreemptionPolicy nil,
		Overhead: k8s.io/api/core/v1.ResourceList nil,
		TopologySpreadConstraints: []k8s.io/api/core/v1.TopologySpreadConstraint len: 0, cap: 0, nil,
		SetHostnameAsFQDN: *bool nil,
		OS: *k8s.io/api/core/v1.PodOS nil,
		HostUsers: *bool nil,
		SchedulingGates: []k8s.io/api/core/v1.PodSchedulingGate len: 0, cap: 0, nil,
		ResourceClaims: []k8s.io/api/core/v1.PodResourceClaim len: 0, cap: 0, nil,},
	Status: k8s.io/api/core/v1.PodStatus {
		Phase: "",
		Conditions: []k8s.io/api/core/v1.PodCondition len: 0, cap: 0, nil,
		Message: "",
		Reason: "",
		NominatedNodeName: "",
		HostIP: "",
		HostIPs: []k8s.io/api/core/v1.HostIP len: 0, cap: 0, nil,
		PodIP: "",
		PodIPs: []k8s.io/api/core/v1.PodIP len: 0, cap: 0, nil,
		StartTime: *k8s.io/apimachinery/pkg/apis/meta/v1.Time nil,
		InitContainerStatuses: []k8s.io/api/core/v1.ContainerStatus len: 0, cap: 0, nil,
		ContainerStatuses: []k8s.io/api/core/v1.ContainerStatus len: 0, cap: 0, nil,
		QOSClass: "",
		EphemeralContainerStatuses: []k8s.io/api/core/v1.ContainerStatus len: 0, cap: 0, nil,
		Resize: "",
		ResourceClaimStatuses: []k8s.io/api/core/v1.PodResourceClaimStatus len: 0, cap: 0, nil,},}





(dlv) frame 16
(dlv) frame 16
> runtime.raise() /usr/local/go/src/runtime/sys_linux_amd64.s:154 (PC: 0x479501)
Warning: debugging optimized function
Frame 16: vendor/k8s.io/apimachinery/pkg/runtime/converter.go:546 (PC: c7c5bc)

(dlv) args
sv = reflect.Value {typ_: ("*internal/abi.Type")(0x197b5e0), ptr: unsafe.Pointer(0xc003ec9860), flag: 21}
dv = reflect.Value {typ_: ("*internal/abi.Type")(0x1bd1820), ptr: unsafe.Pointer(0xc003082600), flag: 409}
ctx = ("*k8s.io/apimachinery/pkg/runtime.fromUnstructuredContext")(0xc002af9778)
(~r0) = (unreadable empty OP stack)
~r0 = (unreadable empty OP stack)
(dlv) p *(*"k8s.io/api/core/v1.Container")(0xc003ec9860)
k8s.io/api/core/v1.Container {
	Name: (unreadable invalid length: -3442974251240390400),
	Image: "",
	Command: []string len: 0, cap: 2, [],
	Args: []string len: 824699571008, cap: 0, [(unreadable could not read string pointer error while reading spliced memory at 0x832f3f0f00000000: EOF),(unreadable could not read string pointer error while reading spliced memory at 0x832f3f0f00000000: EOF),(unreadable could not read string pointer error while reading spliced memory at 0x832f3f0f00000000: EOF),(unreadable could not read string pointer error while reading spliced memory at 0x832f3f0f00000000: EOF),...+824699571004 more],
	WorkingDir: "",
	Ports: []k8s.io/api/core/v1.ContainerPort len: 2350715723715706880, cap: 824699571296, [
		(*"k8s.io/api/core/v1.ContainerPort")(0x3),
		(*"k8s.io/api/core/v1.ContainerPort")(0x3b),
		(*"k8s.io/api/core/v1.ContainerPort")(0x73),
		(*"k8s.io/api/core/v1.ContainerPort")(0xab),
		(*"k8s.io/api/core/v1.ContainerPort")(0xe3),
		(*"k8s.io/api/core/v1.ContainerPort")(0x11b),
		(*"k8s.io/api/core/v1.ContainerPort")(0x153),
		(*"k8s.io/api/core/v1.ContainerPort")(0x18b),
		(*"k8s.io/api/core/v1.ContainerPort")(0x1c3),
		(*"k8s.io/api/core/v1.ContainerPort")(0x1fb),
		(*"k8s.io/api/core/v1.ContainerPort")(0x233),
		(*"k8s.io/api/core/v1.ContainerPort")(0x26b),
		(*"k8s.io/api/core/v1.ContainerPort")(0x2a3),
		(*"k8s.io/api/core/v1.ContainerPort")(0x2db),
		(*"k8s.io/api/core/v1.ContainerPort")(0x313),
		(*"k8s.io/api/core/v1.ContainerPort")(0x34b),
		(*"k8s.io/api/core/v1.ContainerPort")(0x383),
		(*"k8s.io/api/core/v1.ContainerPort")(0x3bb),
		(*"k8s.io/api/core/v1.ContainerPort")(0x3f3),
		(*"k8s.io/api/core/v1.ContainerPort")(0x42b),
		(*"k8s.io/api/core/v1.ContainerPort")(0x463),
		(*"k8s.io/api/core/v1.ContainerPort")(0x49b),
		(*"k8s.io/api/core/v1.ContainerPort")(0x4d3),
		(*"k8s.io/api/core/v1.ContainerPort")(0x50b),
		(*"k8s.io/api/core/v1.ContainerPort")(0x543),
		(*"k8s.io/api/core/v1.ContainerPort")(0x57b),
		(*"k8s.io/api/core/v1.ContainerPort")(0x5b3),
		(*"k8s.io/api/core/v1.ContainerPort")(0x5eb),
		(*"k8s.io/api/core/v1.ContainerPort")(0x623),
		(*"k8s.io/api/core/v1.ContainerPort")(0x65b),
		(*"k8s.io/api/core/v1.ContainerPort")(0x693),
		(*"k8s.io/api/core/v1.ContainerPort")(0x6cb),
		(*"k8s.io/api/core/v1.ContainerPort")(0x703),
		(*"k8s.io/api/core/v1.ContainerPort")(0x73b),
		(*"k8s.io/api/core/v1.ContainerPort")(0x773),
		(*"k8s.io/api/core/v1.ContainerPort")(0x7ab),
		(*"k8s.io/api/core/v1.ContainerPort")(0x7e3),
		(*"k8s.io/api/core/v1.ContainerPort")(0x81b),
		(*"k8s.io/api/core/v1.ContainerPort")(0x853),
		(*"k8s.io/api/core/v1.ContainerPort")(0x88b),
		(*"k8s.io/api/core/v1.ContainerPort")(0x8c3),
		(*"k8s.io/api/core/v1.ContainerPort")(0x8fb),
		(*"k8s.io/api/core/v1.ContainerPort")(0x933),
		(*"k8s.io/api/core/v1.ContainerPort")(0x96b),
		(*"k8s.io/api/core/v1.ContainerPort")(0x9a3),
		(*"k8s.io/api/core/v1.ContainerPort")(0x9db),
		(*"k8s.io/api/core/v1.ContainerPort")(0xa13),
		(*"k8s.io/api/core/v1.ContainerPort")(0xa4b),
		(*"k8s.io/api/core/v1.ContainerPort")(0xa83),
		(*"k8s.io/api/core/v1.ContainerPort")(0xabb),
		(*"k8s.io/api/core/v1.ContainerPort")(0xaf3),
		(*"k8s.io/api/core/v1.ContainerPort")(0xb2b),
		(*"k8s.io/api/core/v1.ContainerPort")(0xb63),
		(*"k8s.io/api/core/v1.ContainerPort")(0xb9b),
		(*"k8s.io/api/core/v1.ContainerPort")(0xbd3),
		(*"k8s.io/api/core/v1.ContainerPort")(0xc0b),
		(*"k8s.io/api/core/v1.ContainerPort")(0xc43),
		(*"k8s.io/api/core/v1.ContainerPort")(0xc7b),
		(*"k8s.io/api/core/v1.ContainerPort")(0xcb3),
		(*"k8s.io/api/core/v1.ContainerPort")(0xceb),
		(*"k8s.io/api/core/v1.ContainerPort")(0xd23),
		(*"k8s.io/api/core/v1.ContainerPort")(0xd5b),
		(*"k8s.io/api/core/v1.ContainerPort")(0xd93),
		(*"k8s.io/api/core/v1.ContainerPort")(0xdcb),
		...+2350715723715706816 more
	],
	EnvFrom: []k8s.io/api/core/v1.EnvFromSource len: 0, cap: 0, nil,
	Env: (unreadable Negative array length),
	Resources: k8s.io/api/core/v1.ResourceRequirements {
		Limits: k8s.io/api/core/v1.ResourceList nil,
		Requests: k8s.io/api/core/v1.ResourceList nil,
		Claims: (unreadable non-zero length array with nil base),},
	ResizePolicy: []k8s.io/api/core/v1.ContainerResizePolicy len: 0, cap: 0, [],
	RestartPolicy: *k8s.io/api/core/v1.ContainerRestartPolicy nil,
	VolumeMounts: (unreadable Negative array length),
	VolumeDevices: []k8s.io/api/core/v1.VolumeDevice len: 0, cap: 0, nil,
	LivenessProbe: *k8s.io/api/core/v1.Probe {
		ProbeHandler: (*"k8s.io/api/core/v1.ProbeHandler")(0x1),
		InitialDelaySeconds: (unreadable error while reading spliced memory at 0x1: EOF),
		TimeoutSeconds: (unreadable error while reading spliced memory at 0x1: EOF),
		PeriodSeconds: (unreadable error while reading spliced memory at 0x1: EOF),
		SuccessThreshold: (unreadable error while reading spliced memory at 0x1: EOF),
		FailureThreshold: (unreadable error while reading spliced memory at 0x1: EOF),
		TerminationGracePeriodSeconds: (unreadable error while reading spliced memory at 0x1: EOF),},
	ReadinessProbe: *k8s.io/api/core/v1.Probe {
		ProbeHandler: (*"k8s.io/api/core/v1.ProbeHandler")(0xa4c9ba4900000000),
		InitialDelaySeconds: (unreadable error while reading spliced memory at 0xa4c9ba4900000000: EOF),
		TimeoutSeconds: (unreadable error while reading spliced memory at 0xa4c9ba4900000000: EOF),
		PeriodSeconds: (unreadable error while reading spliced memory at 0xa4c9ba4900000000: EOF),
		SuccessThreshold: (unreadable error while reading spliced memory at 0xa4c9ba4900000000: EOF),
		FailureThreshold: (unreadable error while reading spliced memory at 0xa4c9ba4900000000: EOF),
		TerminationGracePeriodSeconds: (unreadable error while reading spliced memory at 0xa4c9ba4900000000: EOF),},
	StartupProbe: *k8s.io/api/core/v1.Probe {
		ProbeHandler: (*"k8s.io/api/core/v1.ProbeHandler")(0xc003eccfc0),
		InitialDelaySeconds: 0,
		TimeoutSeconds: 0,
		PeriodSeconds: 0,
		SuccessThreshold: 0,
		FailureThreshold: 0,
		TerminationGracePeriodSeconds: *int64 nil,},
	Lifecycle: *k8s.io/api/core/v1.Lifecycle nil,
	TerminationMessagePath: "",
	TerminationMessagePolicy: (unreadable invalid length: -960315560233533440),
	ImagePullPolicy: "",
	SecurityContext: *k8s.io/api/core/v1.SecurityContext nil,
	Stdin: false,
	StdinOnce: false,
	TTY: false,}


(dlv) locals 
.autotmp_60 = struct {} {}
.autotmp_51 = struct {} {}
~r0ptr = (unreadable empty OP stack)
~r0flag = (unreadable empty OP stack)
st = reflect.Type(*reflect.rtype) 0xbeef000000000e08
dt = reflect.Type(*reflect.rtype) 0xbeef000000000f08
svInlined = (unreadable could not find loclist entry at 0xb05e76 for address 0xc7c5bc)
i = 19
fieldInfo = ("*k8s.io/apimachinery/pkg/runtime.fieldInfo")(0xc0032240c0)
(dlv) p *("*k8s.io/apimachinery/pkg/runtime.fieldInfo")(0xc0032240c0)
k8s.io/apimachinery/pkg/runtime.fieldInfo {
	name: (unreadable could not read string at 0x5000d33db7565000 due to error while reading spliced memory at 0x5000d33db7565000: EOF),
	nameValue: reflect.Value {
		typ_: *(*"internal/abi.Type")(0x6ff0040c6013c00),
		ptr: unsafe.Pointer(0x1e0a1d001e0a8165),
		flag: 17817648600600026112,},
	omitempty: true,}



Frame 15: /usr/local/go/src/reflect/value.go:1821 (PC: 4d7728)
(dlv) args
v = reflect.Value {typ_: ("*internal/abi.Type")(0x197b5e0), ptr: unsafe.Pointer(0xc003ec9860), flag: 0}
key = (unreadable could not find loclist entry at 0x15c5af for address 0x4d7728)
~r0 = (unreadable empty OP stack)
(dlv) locals
e = (unreadable could not find loclist entry at 0x15c66a for address 0x4d7728)
(dlv)

@seankhliao seankhliao added WaitingForInfo Issue is not actionable because of missing required information, which needs to be provided. and removed WaitingForInfo Issue is not actionable because of missing required information, which needs to be provided. labels Jul 10, 2024
@gopherbot
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Timed out in state WaitingForInfo. Closing.

(I am just a bot, though. Please speak up if this is a mistake or you have the requested information.)

@gopherbot gopherbot closed this as not planned Won't fix, can't repro, duplicate, stale Aug 10, 2024
@lukai249324454
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I also encountered this issue in the go 1.23.1 version,
It occurs multiple times and takes over 10 minutes to appear.
Each time, it occurs during a map of type map [string] any,
when i for range a map to copy

image
image

@ianlancetaylor
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@lukai249324454 Thanks. I don't see any obvious reason to think that you are seeing the same bug. Please open a new issue.

Please also include plain text as text, not as an image. Images are much harder to read. Thanks.

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compiler/runtime Issues related to the Go compiler and/or runtime. WaitingForInfo Issue is not actionable because of missing required information, which needs to be provided.
Projects
Go Compiler / Runtime
Status: Done
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6 participants
@ianlancetaylor @gopherbot @seankhliao @lukai249324454 @shaj13 @gabyhelp