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Fix rebuild problem with LKDTM's rodata test.

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 Comment: Kees Cook <kees@outflux.net>
 
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Merge tag 'lkdtm-v4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull lkdtm update from Kees Cook:
 "Fix rebuild problem with LKDTM's rodata test"

[ This, and the usercopy branch, both came in before the merge window
  closed, but ended up in my 'need to look more' queue and thus got
  merged only after rc1 was out ]

* tag 'lkdtm-v4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  lkdtm: Fix targets for objcopy usage
  lkdtm: fix false positive warning from -Wmaybe-uninitialized
This commit is contained in:
Linus Torvalds 2016-08-08 15:39:24 -07:00
commit 81abf25258
2 changed files with 3 additions and 2 deletions
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3
drivers/misc/Makefile
View File

@ -69,5 +69,6 @@ OBJCOPYFLAGS :=
OBJCOPYFLAGS_lkdtm_rodata_objcopy.o := \
--set-section-flags .text=alloc,readonly \
--rename-section .text=.rodata
$(obj)/lkdtm_rodata_objcopy.o: $(obj)/lkdtm_rodata.o
targets += lkdtm_rodata.o lkdtm_rodata_objcopy.o
$(obj)/lkdtm_rodata_objcopy.o: $(obj)/lkdtm_rodata.o FORCE
$(call if_changed,objcopy)

2
drivers/misc/lkdtm_usercopy.c
View File

@ -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;