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// Copyright 2024 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package image_test
import (
"fmt"
"io"
"os"
"path/filepath"
"strings"
"testing"
. "github.com/google/syzkaller/pkg/image"
"github.com/google/syzkaller/prog"
"github.com/google/syzkaller/sys/targets"
)
// To get maximum test coverage here, install the following Debian packages:
// dosfstools e2fsprogs btrfs-progs util-linux f2fs-tools jfsutils util-linux
// dosfstools ocfs2-tools reiserfsprogs xfsprogs erofs-utils exfatprogs
// gfs2-utils.
const corruptedFs = "IAmACorruptedFs"
func TestFsck(t *testing.T) {
target, err := prog.GetTarget(targets.Linux, targets.AMD64)
if err != nil {
t.Fatal(err)
}
fsckChecker := FsckChecker{}
// Use the images generated by syz-imagegen as a collection of clean file systems.
cleanFsProgs, err := filepath.Glob(filepath.Join("..", "sys", "linux", "test", "syz_mount_image_*_0"))
if err != nil {
t.Fatalf("directory read failed: %v", err)
}
for _, file := range cleanFsProgs {
sourceProg, err := os.ReadFile(file)
if err != nil {
t.Fatal(err)
}
p, err := target.Deserialize(sourceProg, prog.NonStrict)
if err != nil {
t.Fatalf("failed to deserialize %s: %s", file, err)
}
p.ForEachAsset(func(name string, typ prog.AssetType, r io.Reader, c *prog.Call) {
if c.Meta.Attrs.Fsck == "" {
return
}
fsckCmd := c.Meta.Attrs.Fsck
// Tolerate missing fsck commands except during CI runs.
skip := !fsckChecker.Exists(fsckCmd) && os.Getenv("CI") == ""
fsName := strings.TrimPrefix(c.Meta.Name, "syz_mount_image$")
// Check that the file system in the image is detected as clean.
t.Run(fmt.Sprintf("clean %s", fsName), func(t *testing.T) {
if skip {
t.Skipf("%s not available", fsckCmd)
}
logs, isClean, err := Fsck(r, fsckCmd)
if err != nil {
t.Fatalf("failed to run fsck %s", err)
}
if !isClean {
t.Fatalf("%s should exit 0 on a clean file system %s", fsckCmd, string(logs))
}
})
// And use the same fsck command on a dummy fs to make sure that fails.
t.Run(fmt.Sprintf("corrupt %s", fsName), func(t *testing.T) {
if skip {
t.Skipf("%s not available", fsckCmd)
}
logs, isClean, err := Fsck(strings.NewReader(corruptedFs), fsckCmd)
if err != nil {
t.Fatalf("failed to run fsck %s", err)
}
if isClean {
t.Fatalf("%s shouldn't exit 0 on a corrupt file system %s", fsckCmd, string(logs))
}
})
})
}
}
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