| From e7d24c0aa8e678f41457d1304e2091cac6fd1a2e Mon Sep 17 00:00:00 2001 |
| From: Ard Biesheuvel <ardb@kernel.org> |
| Date: Thu, 28 Mar 2024 07:42:57 +0100 |
| Subject: gcc-plugins/stackleak: Avoid .head.text section |
| |
| From: Ard Biesheuvel <ardb@kernel.org> |
| |
| commit e7d24c0aa8e678f41457d1304e2091cac6fd1a2e upstream. |
| |
| 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. |
| |
| Fixes: 48204aba801f1b51 ("x86/sme: Move early SME kernel encryption handling into .head.text") |
| Reported-by: kernel test robot <oliver.sang@intel.com> |
| Closes: https://lore.kernel.org/oe-lkp/202403221630.2692c998-oliver.sang@intel.com |
| Signed-off-by: Ard Biesheuvel <ardb@kernel.org> |
| Link: https://lore.kernel.org/r/20240328064256.2358634-2-ardb+git@google.com |
| Signed-off-by: Kees Cook <keescook@chromium.org> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| --- |
| scripts/gcc-plugins/stackleak_plugin.c | 2 ++ |
| 1 file changed, 2 insertions(+) |
| |
| --- a/scripts/gcc-plugins/stackleak_plugin.c |
| +++ b/scripts/gcc-plugins/stackleak_plugin.c |
| @@ -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; |
