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ubsan: enable for all*config builds

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With UBSAN_OBJECT_SIZE disabled for GCC, only UBSAN_ALIGNMENT remained a
noisy UBSAN option.  Disable it for COMPILE_TEST so the rest of UBSAN can
be used for full all*config builds or other large combinations.

[[email protected]: add .data..Lubsan_data*/.data..Lubsan_type* sections explicitly]
  Link: https://lkml.kernel.org/r/[email protected]

Link: https://lore.kernel.org/lkml/CAHk-=wgXW=YLxGN0QVpp-1w5GDd2pf1W-FqY15poKzoVfik2qA@mail.gmail.com/
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Kees Cook <[email protected]>
Signed-off-by: Stephen Rothwell <[email protected]>
Cc: Andrey Ryabinin <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Dmitry Vyukov <[email protected]>
Cc: George Popescu <[email protected]>
Cc: Herbert Xu <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Marco Elver <[email protected]>
Cc: Masahiro Yamada <[email protected]>
Cc: Michal Marek <[email protected]>
Cc: Nathan Chancellor <[email protected]>
Cc: Nick Desaulniers <[email protected]>
Cc: Peter Oberparleiter <[email protected]>
Cc: Randy Dunlap <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Kees Cook authored and Linus Torvalds committed 2020-12-15 22:46:18 -08:00
1 parent 79791378a1
commit d0a3ac549f
2 files changed
+5 -2
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arch/powerpc/kernel/vmlinux.lds.S
+4
View File
@@ -313,6 +313,10 @@ SECTIONS
#else
.data : AT(ADDR(.data) - LOAD_OFFSET) {
DATA_DATA
#ifdef CONFIG_UBSAN
*(.data..Lubsan_data*)
*(.data..Lubsan_type*)
#endif
*(.data.rel*)
*(.toc1)
*(.branch_lt)
lib/Kconfig.ubsan
+1 -2
View File
@@ -130,7 +130,6 @@ config UBSAN_ENUM
config UBSAN_SANITIZE_ALL
bool "Enable instrumentation for the entire kernel"
depends on ARCH_HAS_UBSAN_SANITIZE_ALL
depends on !COMPILE_TEST
default y
help
This option activates instrumentation for the entire kernel.
@@ -142,7 +141,7 @@ config UBSAN_SANITIZE_ALL
config UBSAN_ALIGNMENT
bool "Enable checks for pointers alignment"
default !HAVE_EFFICIENT_UNALIGNED_ACCESS
depends on !UBSAN_TRAP
depends on !UBSAN_TRAP && !COMPILE_TEST
depends on $(cc-option,-fsanitize=alignment)
help
This option enables the check of unaligned memory accesses.