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

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: 48204aba80 ("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>
This commit is contained in:
Ard Biesheuvel 2024-03-28 07:42:57 +01:00 committed by Kees Cook
parent 39cd87c4eb
commit e7d24c0aa8
1 changed files with 2 additions and 0 deletions
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2
scripts/gcc-plugins/stackleak_plugin.c
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@ -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;