all: use special placeholder for errors

5 files changed, 12 insertions, 12 deletions

diff --git a/pkg/osutil/fileutil.go b/pkg/osutil/fileutil.go
index 966560649..850335cfe 100644
--- a/pkg/osutil/fileutil.go
+++ b/pkg/osutil/fileutil.go
@@ -55,12 +55,12 @@ func WriteTempFile(data []byte) (string, error) {
 	// Note: pkg/report knows about "syzkaller" prefix as it appears in crashes as process name.
 	f, err := os.CreateTemp("", "syzkaller")
 	if err != nil {
-		return "", fmt.Errorf("failed to create a temp file: %v", err)
+		return "", fmt.Errorf("failed to create a temp file: %w", err)
 	}
 	if _, err := f.Write(data); err != nil {
 		f.Close()
 		os.Remove(f.Name())
-		return "", fmt.Errorf("failed to write a temp file: %v", err)
+		return "", fmt.Errorf("failed to write a temp file: %w", err)
 	}
 	f.Close()
 	return f.Name(), nil
diff --git a/pkg/osutil/fileutil_test.go b/pkg/osutil/fileutil_test.go
index 20d02ea22..33a450fda 100644
--- a/pkg/osutil/fileutil_test.go
+++ b/pkg/osutil/fileutil_test.go
@@ -38,7 +38,7 @@ func TestProcessTempDir(t *testing.T) {
 				go func() {
 					dir, err := ProcessTempDir(tmp)
 					if err != nil {
-						done <- fmt.Errorf("failed to create temp dir: %v", err)
+						done <- fmt.Errorf("failed to create temp dir: %w", err)
 						return
 					}
 					mu.Lock()
diff --git a/pkg/osutil/osutil.go b/pkg/osutil/osutil.go
index ba1fb8729..1687cef9d 100644
--- a/pkg/osutil/osutil.go
+++ b/pkg/osutil/osutil.go
@@ -43,7 +43,7 @@ func Run(timeout time.Duration, cmd *exec.Cmd) ([]byte, error) {
 	}
 	setPdeathsig(cmd, true)
 	if err := cmd.Start(); err != nil {
-		return nil, fmt.Errorf("failed to start %v %+v: %v", cmd.Path, cmd.Args, err)
+		return nil, fmt.Errorf("failed to start %v %+v: %w", cmd.Path, cmd.Args, err)
 	}
 	done := make(chan bool)
 	timedout := make(chan bool, 1)
@@ -125,7 +125,7 @@ func PrependContext(ctx string, err error) error {
 		err1.Title = fmt.Sprintf("%v: %v", ctx, err1.Title)
 		return err1
 	default:
-		return fmt.Errorf("%v: %v", ctx, err)
+		return fmt.Errorf("%v: %w", ctx, err)
 	}
 }
 
@@ -147,7 +147,7 @@ func IsAccessible(name string) error {
 	}
 	f, err := os.Open(name)
 	if err != nil {
-		return fmt.Errorf("%v can't be opened (%v)", name, err)
+		return fmt.Errorf("%v can't be opened (%w)", name, err)
 	}
 	f.Close()
 	return nil
@@ -157,7 +157,7 @@ func IsAccessible(name string) error {
 func IsWritable(name string) error {
 	f, err := os.OpenFile(name, os.O_WRONLY, DefaultFilePerm)
 	if err != nil {
-		return fmt.Errorf("%v can't be written (%v)", name, err)
+		return fmt.Errorf("%v can't be written (%w)", name, err)
 	}
 	f.Close()
 	return nil
@@ -297,7 +297,7 @@ func WriteExecFile(filename string, data []byte) error {
 func TempFile(prefix string) (string, error) {
 	f, err := os.CreateTemp("", prefix)
 	if err != nil {
-		return "", fmt.Errorf("failed to create temp file: %v", err)
+		return "", fmt.Errorf("failed to create temp file: %w", err)
 	}
 	f.Close()
 	return f.Name(), nil
diff --git a/pkg/osutil/osutil_unix.go b/pkg/osutil/osutil_unix.go
index 5563fb5fd..cf6b0284e 100644
--- a/pkg/osutil/osutil_unix.go
+++ b/pkg/osutil/osutil_unix.go
@@ -89,7 +89,7 @@ func HandleInterrupts(shutdown chan struct{}) {
 func LongPipe() (io.ReadCloser, io.WriteCloser, error) {
 	r, w, err := os.Pipe()
 	if err != nil {
-		return nil, nil, fmt.Errorf("failed to create pipe: %v", err)
+		return nil, nil, fmt.Errorf("failed to create pipe: %w", err)
 	}
 	prolongPipe(r, w)
 	return r, w, err
@@ -108,14 +108,14 @@ func CreateMemMappedFile(size int) (f *os.File, mem []byte, err error) {
 		return
 	}
 	if err = f.Truncate(int64(size)); err != nil {
-		err = fmt.Errorf("failed to truncate shared mem file: %v", err)
+		err = fmt.Errorf("failed to truncate shared mem file: %w", err)
 		CloseSharedMemFile(f)
 		return
 	}
 
 	mem, err = syscall.Mmap(int(f.Fd()), 0, size, syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_SHARED)
 	if err != nil {
-		err = fmt.Errorf("failed to mmap shm file: %v", err)
+		err = fmt.Errorf("failed to mmap shm file: %w", err)
 		CloseSharedMemFile(f)
 	}
 	return
diff --git a/pkg/osutil/sharedmem_memfd.go b/pkg/osutil/sharedmem_memfd.go
index 9eb3a4075..213080e49 100644
--- a/pkg/osutil/sharedmem_memfd.go
+++ b/pkg/osutil/sharedmem_memfd.go
@@ -18,7 +18,7 @@ func CreateSharedMemFile(size int) (f *os.File, err error) {
 	// The name is actually irrelevant and can even be the same for all such files.
 	fd, err := unix.MemfdCreate("syz-shared-mem", unix.MFD_CLOEXEC)
 	if err != nil {
-		err = fmt.Errorf("failed to do memfd_create: %v", err)
+		err = fmt.Errorf("failed to do memfd_create: %w", err)
 		return
 	}
 	f = os.NewFile(uintptr(fd), fmt.Sprintf("/proc/self/fd/%d", fd))