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linux/drivers/misc/lkdtm
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Jan Hendrik Farr f06e108a3d Compiler Attributes: disable __counted_by for clang < 19.1.3 
This patch disables __counted_by for clang versions < 19.1.3 because
of the two issues listed below. It does this by introducing
CONFIG_CC_HAS_COUNTED_BY.

1. clang < 19.1.2 has a bug that can lead to __bdos returning 0:
https://github.com/llvm/llvm-project/pull/110497

2. clang < 19.1.3 has a bug that can lead to __bdos being off by 4:
https://github.com/llvm/llvm-project/pull/112636

Fixes: c8248faf3c ("Compiler Attributes: counted_by: Adjust name and identifier expansion")
Cc: stable@vger.kernel.org # 6.6.x: 16c31dd7fd: Compiler Attributes: counted_by: bump min gcc version
Cc: stable@vger.kernel.org # 6.6.x: 2993eb7a8d: Compiler Attributes: counted_by: fixup clang URL
Cc: stable@vger.kernel.org # 6.6.x: 231dc3f0c9: lkdtm/bugs: Improve warning message for compilers without counted_by support
Cc: stable@vger.kernel.org # 6.6.x
Reported-by: Nathan Chancellor <nathan@kernel.org>
Closes: https://lore.kernel.org/all/20240913164630.GA4091534@thelio-3990X/
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202409260949.a1254989-oliver.sang@intel.com
Link: https://lore.kernel.org/all/Zw8iawAF5W2uzGuh@archlinux/T/#m204c09f63c076586a02d194b87dffc7e81b8de7b
Suggested-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Jan Hendrik Farr <kernel@jfarr.cc>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Miguel Ojeda <ojeda@kernel.org>
Reviewed-by: Thorsten Blum <thorsten.blum@linux.dev>
Link: https://lore.kernel.org/r/20241029140036.577804-2-kernel@jfarr.cc
Signed-off-by: Kees Cook <kees@kernel.org>
2024-11-19 08:48:27 -08:00
..
bugs.c Compiler Attributes: disable __counted_by for clang < 19.1.3 2024-11-19 08:48:27 -08:00
cfi.c lkdtm: Fix CFI_BACKWARD on RISC-V 2023-10-27 14:43:10 -07:00
core.c lkdtm: Make lkdtm_do_action() return to avoid tail call optimization 2024-02-01 09:44:07 -08:00
fortify.c lkdtm: Update tests for memcpy() run-time warnings 2022-09-07 16:37:27 -07:00
heap.c mm/slub: unify all sl[au]b parameters with "slab_$param" 2024-01-22 10:31:08 +01:00
lkdtm.h lkdtm: Move crashtype definitions into each category 2022-04-12 16:16:48 -07:00
Makefile Kbuild updates for v6.10 2024-05-18 12:39:20 -07:00
perms.c lkdtm: Disable CFI checking for perms functions 2024-05-01 12:37:42 -07:00
powerpc.c lkdtm: Move crashtype definitions into each category 2022-04-12 16:16:48 -07:00
refcount.c refcount: Report UAF for refcount_sub_and_test(0) when counter==0 2024-08-05 14:34:23 -07:00
rodata.c lkdtm: don't move ctors to .rodata 2020-12-09 15:51:14 +01:00
stackleak.c lkdtm/stackleak: Fix noinstr violation 2023-04-14 16:08:26 +02:00
usercopy.c treewide: Drop function_nocfi 2022-09-26 10:13:14 -07:00