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tools/syz-symbolize: Store crash report if outdir is given

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We want to check if the original crash reproducer was generated is
reproduced. We need to generate syzkaller style crash report on
reproducer log and check if hash matches with the original hash.
This patch adds outdir flags to syz-symbolize and stores crashes found
from given log into it.
This commit is contained in:
Jouni Högander 2020-03-04 11:35:51 +02:00 committed by Dmitry Vyukov
parent 9a5264054c
commit 5ed396e666
1 changed files with 29 additions and 0 deletions
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29
tools/syz-symbolize/symbolize.go
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@ -8,9 +8,12 @@ import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"runtime"
"github.com/google/syzkaller/pkg/hash"
"github.com/google/syzkaller/pkg/mgrconfig"
"github.com/google/syzkaller/pkg/osutil"
"github.com/google/syzkaller/pkg/report"
)
@ -19,6 +22,7 @@ var (
flagArch = flag.String("arch", runtime.GOARCH, "target arch")
flagKernelObj = flag.String("kernel_obj", ".", "path to kernel build/obj dir")
flagKernelSrc = flag.String("kernel_src", "", "path to kernel sources (defaults to kernel_obj)")
flagOutDir = flag.String("outdir", "", "output directory")
)
func main() {
@ -49,6 +53,8 @@ func main() {
rep := reporter.Parse(text)
if rep == nil {
rep = &report.Report{Report: text}
} else if *flagOutDir != "" {
saveCrash(rep, *flagOutDir)
}
if err := reporter.Symbolize(rep); err != nil {
fmt.Fprintf(os.Stderr, "failed to symbolize report: %v\n", err)
@ -60,3 +66,26 @@ func main() {
fmt.Printf("\n")
os.Stdout.Write(rep.Report)
}
func saveCrash(rep *report.Report, path string) {
sig := hash.Hash([]byte(rep.Title))
id := sig.String()
dir := filepath.Join(path, id)
osutil.MkdirAll(dir)
if err := osutil.WriteFile(filepath.Join(dir, "description"), []byte(rep.Title+"\n")); err != nil {
fmt.Fprintf(os.Stderr, "failed to write description: %v", err)
os.Exit(1)
}
if err := osutil.WriteFile(filepath.Join(dir, "log"), rep.Output); err != nil {
fmt.Fprintf(os.Stderr, "failed to write log: %v", err)
os.Exit(1)
}
if len(rep.Report) > 0 {
if err := osutil.WriteFile(filepath.Join(dir, "report"), rep.Report); err != nil {
fmt.Fprintf(os.Stderr, "failed to write report: %v", err)
os.Exit(1)
}
}
}