The patch titled
Subject: compiler-attributes-add-__alloc_size-for-better-bounds-checking-fix
has been added to the -mm tree. Its filename is
compiler-attributes-add-__alloc_size-for-better-bounds-checking-fix.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/compiler-attributes-add-__alloc_size-for-better-bounds-checking-fix.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/compiler-attributes-add-__alloc_size-for-better-bounds-checking-fix.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Kees Cook <keescook@xxxxxxxxxxxx>
Subject: compiler-attributes-add-__alloc_size-for-better-bounds-checking-fix
fix warning
cc1: warning: unrecognized command line option '-Wno-alloc-size-larger-than'
Ew. Thanks for letting me know. I thought I'd verified this existed in
gcc going back to 4.9, but it looks like I did something wrong in that
test.
Link: https://lkml.kernel.org/r/202108202248.921E8C66@keescook
Reported-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/Makefile~compiler-attributes-add-__alloc_size-for-better-bounds-checking-fix
+++ a/Makefile
@@ -1081,7 +1081,7 @@ KBUILD_CFLAGS += $(call cc-disable-warni
ifdef CONFIG_CC_IS_GCC
# The allocators already balk at large sizes, so silence the compiler
# warnings for bounds checks involving those possible values.
-KBUILD_CFLAGS += -Wno-alloc-size-larger-than
+KBUILD_CFLAGS += $(call cc-option, -Wno-alloc-size-larger-than)
endif
# disable invalid "can't wrap" optimizations for signed / pointers
_
Patches currently in -mm which might be from keescook@xxxxxxxxxxxx are
compiler-attributes-add-__alloc_size-for-better-bounds-checking.patch
compiler-attributes-add-__alloc_size-for-better-bounds-checking-fix.patch
checkpatch-add-__alloc_size-to-known-attribute.patch
slab-clean-up-function-declarations.patch
slab-add-__alloc_size-attributes-for-better-bounds-checking.patch
mm-page_alloc-add-__alloc_size-attributes-for-better-bounds-checking.patch
percpu-add-__alloc_size-attributes-for-better-bounds-checking.patch
