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debug/elf: infinite loop? in elf.NewFile (recent regression from go 1.19) #56129

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catenacyber opened this issue Oct 10, 2022 · 2 comments
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debug/elf: infinite loop? in elf.NewFile (recent regression from go 1.19) #56129

catenacyber opened this issue Oct 10, 2022 · 2 comments
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@ianlancetaylor
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compiler/runtime Issues related to the Go compiler and/or runtime. FrozenDueToAge
Milestone
Go1.20

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

$ go version
go version go1.18.3 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
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/catena/Library/Caches/go-build"
GOENV="/Users/catena/Library/Application Support/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/catena/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/catena/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GOVCS=""
GOVERSION="go1.18.3"
GCCGO="gccgo"
GOAMD64="v1"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/dev/null"
GOWORK=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/pp/dc1dtf9x2js3v0jx_m010nqr0000gn/T/go-build2205394633=/tmp/go-build -gno-record-gcc-switches -fno-common"
GOROOT/bin/go version: go version go1.18.3 darwin/amd64
GOROOT/bin/go tool compile -V: compile version go1.18.3
uname -v: Darwin Kernel Version 21.6.0: Mon Aug 22 20:17:10 PDT 2022; root:xnu-8020.140.49~2/RELEASE_X86_64
ProductName:	macOS
ProductVersion:	12.6
BuildVersion:	21G115
lldb --version: lldb-1400.0.30.3
Apple Swift version 5.7 (swiftlang-5.7.0.127.4 clang-1400.0.29.50)
gdb --version: GNU gdb (GDB) 12.1

What did you do?

Run https://go.dev/play/p/43zIUU90Ko9?v=gotip

No problem on go 1.19 cf https://go.dev/play/p/43zIUU90Ko9

What did you expect to see?

The program printing Hello

What did you see instead?


Program exited.

Found by ngolo-fuzzing https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=52297
@gopherbot gopherbot added the compiler/runtime Issues related to the Go compiler and/or runtime. label Oct 10, 2022
@Jorropo
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Jorropo commented Oct 10, 2022

Bisected to 7d157fd first bad commit.

@gopherbot
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Change https://go.dev/cl/441976 mentions this issue: debug/elf: validate phentsize and shentsize

@thanm thanm added this to the Go1.20 milestone Oct 12, 2022
romaindoumenc pushed a commit to TroutSoftware/go that referenced this issue Nov 3, 2022
@ianlancetaylor @romaindoumenc
debug/elf: validate phentsize and shentsize
1776909 
No test case because the problem can only happen for invalid data. Let
the fuzzer find cases like this.

Fixes golang#56129

Change-Id: I6c81933781384c5e2c8ba0fd99cec50455b9664a
Reviewed-on: https://go-review.googlesource.com/c/go/+/441976
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Joedian Reid <joedian@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
@golang golang locked and limited conversation to collaborators Oct 12, 2023
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@ianlancetaylor @gopherbot @thanm @Jorropo @catenacyber