fix(emulation): avoid nil pointer dereference in registeredBinfmtMisc

SquallATF · SquallATF · commit 430b258152e4 · 2025-09-09T09:48:53.000+08:00
When `/proc/sys/fs/binfmt_misc` is not mounted, filepath.WalkDir may pass a nil DirEntry. This caused podman info to panic. Add a nil check to avoid dereferencing it.

Signed-off-by: Peiyuan Song &lt;squallatf@gmail.com&gt;
diff --git a/pkg/emulation/binfmtmisc_linux.go b/pkg/emulation/binfmtmisc_linux.go
@@ -27,7 +27,10 @@ func registeredBinfmtMisc() ([]string, error) {
 		if filepath.Base(path) == "register" { // skip this one
 			return nil
 		}
-		if err != nil && !errors.Is(err, os.ErrNotExist) {
+		if err != nil {
+			if errors.Is(err, fs.ErrNotExist) {
+				return nil
+			}
 			return err
 		}
 		info, err := d.Info()

Original file line number	Diff line number	Diff line change
`@@ -27,7 +27,10 @@ func registeredBinfmtMisc() ([]string, error) {`
`27`	`27`	`if filepath.Base(path) == "register" { // skip this one`
`28`	`28`	`return nil`
`29`	`29`	`}`
`30`		`- if err != nil && !errors.Is(err, os.ErrNotExist) {`
	`30`	`+ if err != nil {`
	`31`	`+ if errors.Is(err, fs.ErrNotExist) {`
	`32`	`+ return nil`
	`33`	`+ }`
`31`	`34`	`return err`
`32`	`35`	`}`
`33`	`36`	`info, err := d.Info()`