cmd/link: panic: runtime error: slice bounds out of range [::1751306] with length 1048576 #41621

w01fb0ss · 2020-09-25T01:30:49Z

What version of Go are you using (`go version`)?

$ go version
$ go version go1.15.2 darwin/amd64

Does this issue reproduce with the latest release?

What operating system and processor architecture are you using (`go env`)?

go env Output

$ go env
![image](https://user-images.githubusercontent.com/44709004/94216230-74f59580-ff11-11ea-8947-a36c8bfbf679.png)

What did you do?

$ go build -o xxx main.go

What did you expect to see?

build success

What did you see instead?

The text was updated successfully, but these errors were encountered:

w01fb0ss · 2020-09-25T01:32:04Z

$ go env

davecheney · 2020-09-25T01:32:14Z

@w01fb0ss please do not post screenshots of text, please just copy and paste the text. Thank you

ianlancetaylor · 2020-09-25T01:34:23Z

CC @thanm @cherrymui @jeremyfaller

w01fb0ss · 2020-09-25T01:34:50Z

$ go env
GO111MODULE="on"
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/xxx/Library/Caches/go-build"
GOENV="/Users/xxx/Library/Application Support/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/xxx/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/xxx/go"
GOPRIVATE=""
GOPROXY="https://goproxy.cn"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/Users/xxx/go/src/aiotools/server/go.mod"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/13/jzs_fl_10zqbptmd_9flzr040000gn/T/go-build766193444=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you see instead?

command-line-arguments

panic: runtime error: slice bounds out of range [::1751306] with length 1048576

goroutine 1 [running]:
cmd/internal/goobj2.(*Reader).Relocs(0xc00094f710, 0x6, 0xc0000680b0, 0x2d7b, 0xc00010ec80)
/usr/local/go/src/cmd/internal/goobj2/objfile.go:655 +0xb4
cmd/link/internal/loader.(*Loader).relocs(0xc000614000, 0xc000619f80, 0x6, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
/usr/local/go/src/cmd/link/internal/loader/loader.go:1712 +0xf0
cmd/link/internal/loader.(*Loader).Relocs(0xc000614000, 0x116e7, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
/usr/local/go/src/cmd/link/internal/loader/loader.go:1702 +0x7d
cmd/link/internal/ld.(*deadcodePass).flood(0xc0000680a0)
/usr/local/go/src/cmd/link/internal/ld/deadcode.go:119 +0x425
cmd/link/internal/ld.deadcode(0xc00007b880)
/usr/local/go/src/cmd/link/internal/ld/deadcode.go:264 +0xcc
cmd/link/internal/ld.Main(0x14709e0, 0x20, 0x20, 0x1, 0x7, 0x10, 0x0, 0x0, 0x12d81c2, 0x1b, ...)
/usr/local/go/src/cmd/link/internal/ld/main.go:235 +0xd3c
main.main()
/usr/local/go/src/cmd/link/main.go:68 +0x1dc

randall77 · 2020-09-25T02:06:13Z

@thanm @jeremyfaller @cherrymui

thanm · 2020-09-25T11:30:34Z

Would you be able to post instructions and/or source code so that we can reproduce this?

The panic is happening while the linker is reading relocations out of an object file -- the offset it reads from the file is insane, which triggers the bounds range error. It would probably be a good idea to try to rule out the possibility of a corrupted object file (e.g. go clean -cache and rebuild).

odeke-em · 2020-11-29T06:03:34Z

@w01fb0ss, kindly pinging you to take a look. Go1.16 will be released in the next 2.5 months and this issue is stalling completion of the milestone. @thanm asked some questions, @w01fb0ss please take a look.Thank you!

roger6106 · 2020-12-15T20:14:35Z

@thanm: I just ran into this same issue. I have included reproducible code. Run go generate and then go build.

golang-41621.zip

$ go version
go version go1.15.6 darwin/amd64

go env Output

$ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/roger/Library/Caches/go-build"
GOENV="/Users/roger/Library/Application Support/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/roger/go/pkg/mod"
GONOPROXY="[removed]"
GONOSUMDB="[removed]"
GOOS="darwin"
GOPATH="/Users/roger/go"
GOPRIVATE="[removed]"
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/_c/lb59l5wn1yv2sj3g83s0hqbm0000gn/T/go-build160846022=/tmp/go-build -gno-record-gcc-switches -fno-common"

thanm · 2020-12-15T20:24:32Z

Thanks @roger6106 . I will take a look.

thanm · 2020-12-15T20:33:57Z

I can reproduce this on tip; working on a fix.

gopherbot · 2020-12-15T21:11:10Z

Change https://golang.org/cl/278492 mentions this issue: cmd/internal/goobj: fix buglet in object file reader

gopherbot · 2020-12-15T21:11:11Z

Change https://golang.org/cl/278493 mentions this issue: test: add test case for object file reader

thanm · 2020-12-16T13:55:38Z

@gopherbot please consider this for backport to 1.15

gopherbot · 2020-12-16T13:55:53Z

Backport issue(s) opened: #43214 (for 1.15).

Remember to create the cherry-pick CL(s) as soon as the patch is submitted to master, according to https://golang.org/wiki/MinorReleases.

gopherbot · 2020-12-16T14:30:15Z

Change https://golang.org/cl/278673 mentions this issue: cmd/internal/goobj: fix buglet in object file reader

…e reader The code in the Go object file reader was casting a pointer to mmaped memory into a large array prior to performing a read of the relocations section: return (*[1<<20]Reloc)(unsafe.Pointer(&r.b[off]))[:n:n] For very large object files, this artificial array isn't large enough (that is, there are more than 1048576 relocs to read), so update the code to use a larger artifical array size. Fixes #43214. Updates #41621. Change-Id: Ic047c8aef4f8a3839f2e7e3594bce652ebd6bd5b Reviewed-on: https://go-review.googlesource.com/c/go/+/278492 Run-TryBot: Than McIntosh <thanm@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com> Reviewed-by: Jeremy Faller <jeremy@golang.org> Trust: Than McIntosh <thanm@google.com> (cherry picked from commit f4e7a6b) Reviewed-on: https://go-review.googlesource.com/c/go/+/278673

Add test in which a input Go object file contains a very large number of relocations (more than 1<<20). Updates #41621. Change-Id: If1ebf3c4fefbf55ddec4e05c5299e7c48fc697d8 Reviewed-on: https://go-review.googlesource.com/c/go/+/278493 Run-TryBot: Than McIntosh <thanm@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com> Trust: Than McIntosh <thanm@google.com>

ianlancetaylor changed the title ~~panic: runtime error: slice bounds out of range [::1751306] with length 1048576~~ cmd/link: panic: runtime error: slice bounds out of range [::1751306] with length 1048576 Sep 25, 2020

ianlancetaylor added the NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. label Sep 25, 2020

ianlancetaylor added this to the Go1.16 milestone Sep 25, 2020

jeremyfaller added the WaitingForInfo Issue is not actionable because of missing required information, which needs to be provided. label Nov 24, 2020

w01fb0ss closed this as completed Nov 30, 2020

thanm reopened this Dec 15, 2020

aclements added okay-after-beta1 Used by release team to mark a release-blocker issue as okay to resolve either before or after beta1 release-blocker and removed WaitingForInfo Issue is not actionable because of missing required information, which needs to be provided. labels Dec 15, 2020

thanm added NeedsFix The path to resolution is known, but the work has not been done. and removed NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. labels Dec 15, 2020

gopherbot mentioned this issue Dec 16, 2020

cmd/link: panic: runtime error: slice bounds out of range [::1751306] with length 1048576 [1.15 backport] #43214

Closed

gopherbot closed this as completed in f4e7a6b Dec 16, 2020

ncabatoff mentioned this issue Jan 5, 2021

build fails on Fedora 33 hashicorp/vault#10657

Closed

golang locked and limited conversation to collaborators Dec 16, 2021

gopherbot added the FrozenDueToAge label Dec 16, 2021

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cmd/link: panic: runtime error: slice bounds out of range [::1751306] with length 1048576 #41621

cmd/link: panic: runtime error: slice bounds out of range [::1751306] with length 1048576 #41621

w01fb0ss commented Sep 25, 2020

w01fb0ss commented Sep 25, 2020

davecheney commented Sep 25, 2020

ianlancetaylor commented Sep 25, 2020

w01fb0ss commented Sep 25, 2020

randall77 commented Sep 25, 2020

thanm commented Sep 25, 2020

odeke-em commented Nov 29, 2020

roger6106 commented Dec 15, 2020

thanm commented Dec 15, 2020

thanm commented Dec 15, 2020

gopherbot commented Dec 15, 2020

gopherbot commented Dec 15, 2020

thanm commented Dec 16, 2020

gopherbot commented Dec 16, 2020

gopherbot commented Dec 16, 2020

cmd/link: panic: runtime error: slice bounds out of range [::1751306] with length 1048576 #41621

cmd/link: panic: runtime error: slice bounds out of range [::1751306] with length 1048576 #41621

Comments

w01fb0ss commented Sep 25, 2020

What version of Go are you using (go version)?

Does this issue reproduce with the latest release?

What operating system and processor architecture are you using (go env)?

What did you do?

What did you expect to see?

What did you see instead?

w01fb0ss commented Sep 25, 2020

davecheney commented Sep 25, 2020

ianlancetaylor commented Sep 25, 2020

w01fb0ss commented Sep 25, 2020

command-line-arguments

randall77 commented Sep 25, 2020

thanm commented Sep 25, 2020

odeke-em commented Nov 29, 2020

roger6106 commented Dec 15, 2020

thanm commented Dec 15, 2020

thanm commented Dec 15, 2020

gopherbot commented Dec 15, 2020

gopherbot commented Dec 15, 2020

thanm commented Dec 16, 2020

gopherbot commented Dec 16, 2020

gopherbot commented Dec 16, 2020

What version of Go are you using (`go version`)?

What operating system and processor architecture are you using (`go env`)?