The variable in use here doesn't matter (it's just used to exercise taking
up stack space), but this changes its use to pass its address instead,
to avoid a compiler warning:
drivers/misc/lkdtm_usercopy.c:54:15: warning: 'bad_stack' may be used
uninitialized in this function [-Wmaybe-uninitialized]
Reported-by: Arnd Bergmann <a...@arndb.de>
Signed-off-by: Kees Cook <keesc...@chromium.org>
---
drivers/misc/lkdtm_usercopy.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/misc/lkdtm_usercopy.c b/drivers/misc/lkdtm_usercopy.c
index 5a3fd76eec27..5525a204db93 100644
--- a/drivers/misc/lkdtm_usercopy.c
+++ b/drivers/misc/lkdtm_usercopy.c
@@ -49,7 +49,7 @@ static noinline void do_usercopy_stack(bool to_user, bool
bad_frame)
/* This is a pointer to outside our current stack frame. */
if (bad_frame) {
- bad_stack = do_usercopy_stack_callee((uintptr_t)bad_stack);
+ bad_stack = do_usercopy_stack_callee((uintptr_t)&bad_stack);
} else {
/* Put start address just inside stack. */
bad_stack = task_stack_page(current) + THREAD_SIZE;
--
2.7.4
