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debug/macho: nil dereference #58642

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catenacyber opened this issue Feb 22, 2023 · 1 comment
Closed

debug/macho: nil dereference #58642

catenacyber opened this issue Feb 22, 2023 · 1 comment
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compiler/runtime Issues related to the Go compiler and/or runtime. FrozenDueToAge

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

$ go version
go version go1.19 linux/amd64

Does this issue reproduce with the latest release?

Yes

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

go env Output
$ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/root/.cache/go-build"
GOENV="/root/.config/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/root/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/root/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/root/.go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/root/.go/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.19"
GCCGO="gccgo"
GOAMD64="v1"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/src/ngolo-fuzzing/go.mod"
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 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -Wl,--no-gc-sections -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build2481516251=/tmp/go-build -gno-record-gcc-switches"

What did you do?

Run https://go.dev/play/p/zAqXa_V6_Oj

What did you expect to see?

The program finishing and printing Hello

What did you see instead?

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x38 pc=0x48d2c1]

goroutine 1 [running]:
debug/macho.NewFile({0x4ccc08?, 0xc0000a8240})
	/usr/local/go-faketime/src/debug/macho/file.go:353 +0x641
main.main()
	/tmp/sandbox2330595786/prog.go:12 +0xae

Program exited.

Found by https://github.com/catenacyber/ngolo-fuzzing without oss-fuzz (and using some corpus)
@bcmills bcmills added the compiler/runtime Issues related to the Go compiler and/or runtime. label Feb 22, 2023
@catenacyber catenacyber mentioned this issue Feb 22, 2023
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@gopherbot
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Change https://go.dev/cl/470397 mentions this issue: debug/macho: don't crash if dynamic symtab with no symtab

DavidKorczynski pushed a commit to google/oss-fuzz that referenced this issue Feb 23, 2023
@catenacyber
ngolo-fuzzing: generate corpus for targets (#9783)
05d03d3 
Should allow to find new bugs such as
golang/go#58642
eamonnmcmanus pushed a commit to eamonnmcmanus/oss-fuzz that referenced this issue Mar 15, 2023
@catenacyber @eamonnmcmanus
ngolo-fuzzing: generate corpus for targets (google#9783)
fd65520 
Should allow to find new bugs such as
golang/go#58642
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@bcmills @gopherbot @catenacyber