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Date: Tue, 15 Feb 2022 08:59:10 -0800 From: Kees Cook <keescook@...omium.org> To: Arnd Bergmann <arnd@...db.de> Cc: Kees Cook <keescook@...omium.org>, linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org Subject: [PATCH] lib/test_stackinit: Expand variable size for correct testing The pre-case switch variable was too small for the test to detect missing initialization. Expand the variable so the test will start to (expectedly) fail again. Cc: Arnd Bergmann <arnd@...db.de> Signed-off-by: Kees Cook <keescook@...omium.org> --- lib/test_stackinit.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/lib/test_stackinit.c b/lib/test_stackinit.c index a3c74e6a21ff..70bb4f7dea38 100644 --- a/lib/test_stackinit.c +++ b/lib/test_stackinit.c @@ -398,7 +398,7 @@ static int noinline __leaf_switch_none(int path, bool fill) * This is intentionally unreachable. To silence the * warning, build with -Wno-switch-unreachable */ - uint64_t var; + uint64_t var[10]; case 1: target_start = &var; @@ -423,8 +423,8 @@ static int noinline __leaf_switch_none(int path, bool fill) memcpy(check_buf, target_start, target_size); break; default: - var = 5; - return var & forced_mask; + var[1] = 5; + return var[1] & forced_mask; } return 0; } -- 2.30.2
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