gcc-plugins/stackleak: Avoid .head.text section

From: Ard Biesheuvel <[email protected]>

The .head.text section carries the startup code that runs with the MMU off or with a translation of memory that deviates from the ordinary one. So avoid instrumentation with the stackleak plugin, which already avoids .init.text and .noinstr.text entirely.

---
 scripts/gcc-plugins/stackleak_plugin.c | 2 ++
 1 file changed, 2 insertions(+)

index c5c2ce113c92..d20c47d21ad8 100644
@@ -467,6 +467,8 @@ static bool stackleak_gate(void)
 			return false;
 		if (STRING_EQUAL(section, ".entry.text"))
 			return false;
+		if (STRING_EQUAL(section, ".head.text"))
+			return false;
 	}
 
 	return track_frame_size >= 0;

2.44.0.396.g6e790dbe36-goog

Applied to for-next/hardening, thanks!

[1/1] gcc-plugins/stackleak: Avoid .head.text section

      https://git.kernel.org/kees/c/4ac9a796ada0

Take care,

Kees Cook