dvyukov/go-fuzz

/snap/go/10489/src/crypto/internal/bigmod/nat_asm.go:21: misplaced compiler directive

yqiao18 opened this issue · 13 comments

yqiao18 commented

When I ran go-fuzz-build, I encountered this problem:
failed to execute go build: exit status 1

crypto/internal/bigmod

/snap/go/10489/src/crypto/internal/bigmod/nat_asm.go:21: misplaced compiler directive
Is this because the go that my program is using does not match the go that installed on my machine?

wulie commented
  • 🚀1
josharian commented

i just pushed a few commits that should help with this. please make sure you've got the very latest version of go-fuzz and try again. if that doesn't work, please provide a public-code-only complete fuzz file that doesn't build. thanks.

yqiao18 commented

Hello,
Is this command to get the latest version of go-fuzz?
go install github.com/dvyukov/go-fuzz/go-fuzz@latest github.com/dvyukov/go-fuzz/go-fuzz-build@latest
Should I run this command inside the package which I wanna fuzz?

josharian commented

go install github.com/dvyukov/go-fuzz/go-fuzz@latest github.com/dvyukov/go-fuzz/go-fuzz-build@latest

that should work

you should be able to run it anywhere 

yqiao18 commented

I still get the same problem. "misplaced compiler directive"

josharian commented

if that doesn't work, please provide a public-code-only complete fuzz file that doesn't build.

yqiao18 commented

package integration

import (
"crypto/x509"
)

func Fuzz(data []byte) int {
// Call the function you want to fuzz, e.g., x509.ParseCertificateRequest
_, err := x509.ParseCertificateRequest(data)
if err != nil {
return 0 // Tell go-fuzz this input didn't trigger a panic
}
return 1 // This input is interesting
}
I can successfully run the go-fuzz github's example, but cannot run the above code

josharian commented

sigh. i've fixed this bug so many times in so many ways. i'll look again next time i have the heart to. if you want to tackle it yourself, take a look at 7356175 and b1ce7bc -- the fix is very likely to be similar, and in the same area of code.

yqiao18 commented

The fix your provided to me is already there in the latest version of go-fuzz. However, I still have the same error:
/usr/local/go/src/crypto/internal/bigmod/nat_asm.go:21: misplaced compiler directive

Should I change the go-fuzz version to 1.14?

wulie commented
  • 🚀1
hrissan commented

I'm getting the same bug with the following latest versions

go.sum:
github.com/dvyukov/go-fuzz v0.0.0-20240203152606-b1ce7bc07150 h1:8ww/RtfHmtJSLk7nK/TspKZDdgDvvXwp0JMIIhJF35s=
github.com/dvyukov/go-fuzz v0.0.0-20240203152606-b1ce7bc07150/go.mod h1:11Gm+ccJnvAhCNLlf5+cS9KjtbaD5I5zaZpFMsTHWTw=

go install github.com/dvyukov/go-fuzz/go-fuzz@latest github.com/dvyukov/go-fuzz/go-fuzz-build@latest

$ ~/go/bin/go-fuzz-build
failed to execute go build: exit status 1

crypto/internal/bigmod

/usr/local/go/src/crypto/internal/bigmod/nat_asm.go:21: misplaced compiler directive

wulie commented
  • 🚀1
hrissan commented

There is an workaround. You can avoid transpiling module in question.

$ ~/go/bin/go-fuzz-build -preserve crypto/internal/bigmod