6.6-stable review patch. If anyone has any objections, please let me know.
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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;