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32 lines
1.2 KiB
Diff
32 lines
1.2 KiB
Diff
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From e7d24c0aa8e678f41457d1304e2091cac6fd1a2e Mon Sep 17 00:00:00 2001
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From: Ard Biesheuvel <ardb@kernel.org>
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Date: Thu, 28 Mar 2024 07:42:57 +0100
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Subject: gcc-plugins/stackleak: Avoid .head.text section
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The .head.text section carries the startup code that runs with the MMU
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off or with a translation of memory that deviates from the ordinary one.
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So avoid instrumentation with the stackleak plugin, which already avoids
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.init.text and .noinstr.text entirely.
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Fixes: 48204aba801f1b51 ("x86/sme: Move early SME kernel encryption handling into .head.text")
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Reported-by: kernel test robot <oliver.sang@intel.com>
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Closes: https://lore.kernel.org/oe-lkp/202403221630.2692c998-oliver.sang@intel.com
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Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
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Link: https://lore.kernel.org/r/20240328064256.2358634-2-ardb+git@google.com
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Signed-off-by: Kees Cook <keescook@chromium.org>
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---
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scripts/gcc-plugins/stackleak_plugin.c | 2 ++
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1 file changed, 2 insertions(+)
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--- a/scripts/gcc-plugins/stackleak_plugin.c
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+++ b/scripts/gcc-plugins/stackleak_plugin.c
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@@ -467,6 +467,8 @@ static bool stackleak_gate(void)
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return false;
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if (STRING_EQUAL(section, ".entry.text"))
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return false;
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+ if (STRING_EQUAL(section, ".head.text"))
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+ return false;
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}
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return track_frame_size >= 0;
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