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lkdtm: fix false positive warning from -Wmaybe-uninitialized 

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 <arnd@arndb.de>
Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Kees Cook 2016-07-19 13:04:14 -07:00
parent 0e06f5c0de
commit 300108740b
1 changed files with 1 additions and 1 deletions
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2
drivers/misc/lkdtm_usercopy.c
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@ -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;