runtime: panic: runtime error: index out of range on ppc64x when accessing ftab #17854
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CL https://golang.org/cl/32972 mentions this issue. |
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Dec 1, 2016
If a program has had its text section split into multiple sections then the ftab that is built is based on addresses prior to splitting. That means all the function addresses are there and correct because of relocation but the but the computed idx won't always match up quite right and in some cases go beyond the end of the table, causing a panic. To resolve this, determine if the idx is too large and if it is, set it to the last index in ftab. Then search backward to find the matching function address. Fixes golang#17854 Change-Id: I6940e76a5238727b0a9ac23dc80000996db2579a Reviewed-on: https://go-review.googlesource.com/32972 Reviewed-by: David Chase <drchase@google.com>
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Please answer these questions before submitting your issue. Thanks!
What version of Go are you using (
go version)?go version devel +76d8e60 Tue Nov 8 19:58:09 2016 +0000 linux/ppc64le
What operating system and processor architecture are you using (
go env)?Ubuntu 16.04 ppc64le
What did you do?
Build and test of Kubernetes binaries on ppc64le
What did you expect to see?
Successful build and test
What did you see instead?
Failure when trying to run hyperkube -h
~/kublatest/kubernetes/_output/local/bin/linux/ppc64le$ ./hyperkube -h
panic: runtime error: index out of range
fatal error: panic on system stack
runtime stack:
panic(0x127cfba0, 0x15dab720)
/home/boger/golang/fix/go/src/runtime/panic.go:420 +0x700
goroutine 1 [copystack, locked to thread]:
math/big.nat.mul(0x0, 0x0, 0x0, 0xc420014300, 0x1, 0x5, 0xc4200144b0, 0x1, 0x5, 0x129c6a20, ...)
/home/boger/golang/fix/go/src/math/big/nat.go:401 +0x18 fp=0xc420096418 sp=0xc420096418
math/big.(*Int).Mul(0xc42000c3c0, 0xc42000c280, 0xc42000c3a0, 0xc4200144e0)
/home/boger/golang/fix/go/src/math/big/int.go:156 +0x78 fp=0xc420096498 sp=0xc420096418
k8s.io/kubernetes/vendor/gopkg.in/inf%2ev0.glob..func1(0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
/home/boger/kublatest/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/gopkg.in/inf.v0/dec.go:109 +0x144 fp=0xc420096d28 sp=0xc420096498
k8s.io/kubernetes/vendor/gopkg.in/inf%2ev0.init()
/home/boger/kublatest/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/gopkg.in/inf.v0/dec.go:112 +0x238 fp=0xc420097d48 sp=0xc420096d28
k8s.io/kubernetes/pkg/api/resource.init()
/home/boger/kublatest/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/api/resource/suffix.go:199 +0x68 fp=0xc420097da0 sp=0xc420097d48
k8s.io/kubernetes/pkg/api.init()
/home/boger/kublatest/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/api/zz_generated.deepcopy.go:3780 +0x74 fp=0xc420097ee0 sp=0xc420097da0
k8s.io/kubernetes/pkg/api/install.init()
/home/boger/kublatest/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/api/install/install.go:154 +0x68 fp=0xc420097f18 sp=0xc420097ee0
panic: runtime error: index out of range
fatal error: panic on system stack
panic during panic
runtime stack:
panic(0x127cfba0, 0x15dab720)
/home/boger/golang/fix/go/src/runtime/panic.go:420 +0x700
panic(0x127cfba0, 0x15dab720)
/home/boger/golang/fix/go/src/runtime/panic.go:420 +0x700
The panicindex occurs in runtime/symtab.go in findfunc at this line:
The error occurs because the idx that is computed is beyond the end of the ftab. Working on a fix.
The text was updated successfully, but these errors were encountered: