linux-kernel - [PATCH] lib/test_stackinit: move a local outside the switch statement

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Date:   Tue, 18 Feb 2020 10:48:15 +0100
From:   glider@...gle.com
To:     keescook@...omium.org, jannh@...gle.com, ard.biesheuvel@...aro.org
Cc:     linux-kernel@...r.kernel.org,
        Alexander Potapenko <glider@...gle.com>
Subject: [PATCH] lib/test_stackinit: move a local outside the switch statement

Right now CONFIG_INIT_STACK_ALL is unable to initialize locals declared
in switch statements, see http://llvm.org/PR44916.
Move the variable declaration outside the switch in lib/test_stackinit.c
to prevent potential test failures until this is sorted out.

Cc: Kees Cook <keescook@...omium.org>
Signed-off-by: Alexander Potapenko <glider@...gle.com>
---
 lib/test_stackinit.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/test_stackinit.c b/lib/test_stackinit.c
index 2d7d257a430e..41e2a6e0cdaa 100644
--- a/lib/test_stackinit.c
+++ b/lib/test_stackinit.c
@@ -282,9 +282,9 @@ DEFINE_TEST(user, struct test_user, STRUCT, none);
  */
 static int noinline __leaf_switch_none(int path, bool fill)
 {
-	switch (path) {
-		uint64_t var;
+	uint64_t var;
 
+	switch (path) {
 	case 1:
 		target_start = &var;
 		target_size = sizeof(var);
-- 
2.25.0.265.gbab2e86ba0-goog