Hi Linus, Please pull these hardening updates for 6.10-rc1. The bulk of the changes here are related to refactoring and expanding the KUnit tests for string helper and fortify behavior. Some trivial strncpy replacements in fs/ were carried in my tree. Also some fixes to SCSI string handling were carried in my tree since the helper for those was introduce here. Beyond that, just little fixes all around: objtool getting confused about LKDTM+KCFI, preparing for future refactors (constification of sysctl tables, additional __counted_by annotations), a Clang UBSAN+i386 crash fix, and adding more options in the hardening.config Kconfig fragment.
Thanks! -Kees The following changes since commit 39cd87c4eb2b893354f3b850f916353f2658ae6f: Linux 6.9-rc2 (2024-03-31 14:32:39 -0700) are available in the Git repository at: https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git tags/hardening-6.10-rc1 for you to fetch changes up to 6d305cbef1aa01b9714e01e35f3d5c28544cf04d: uapi: stddef.h: Provide UAPI macros for __counted_by_{le, be} (2024-05-08 00:42:25 -0700) ---------------------------------------------------------------- hardening updates for 6.10-rc1 - selftests: Add str*cmp tests (Ivan Orlov) - __counted_by: provide UAPI for _le/_be variants (Erick Archer) - Various strncpy deprecation refactors (Justin Stitt) - stackleak: Use a copy of soon-to-be-const sysctl table (Thomas Weißschuh) - UBSAN: Work around i386 -regparm=3 bug with Clang prior to version 19 - Provide helper to deal with non-NUL-terminated string copying - SCSI: Fix older string copying bugs (with new helper) - selftests: Consolidate string helper behavioral tests - selftests: add memcpy() fortify tests - string: Add additional __realloc_size() annotations for "dup" helpers - LKDTM: Fix KCFI+rodata+objtool confusion - hardening.config: Enable KCFI ---------------------------------------------------------------- Erick Archer (1): uapi: stddef.h: Provide UAPI macros for __counted_by_{le, be} Ivan Orlov (1): string_kunit: Add test cases for str*cmp functions Justin Stitt (5): virt: acrn: replace deprecated strncpy with strscpy reiserfs: replace deprecated strncpy with scnprintf hfsplus: refactor copy_name to not use strncpy fs: ecryptfs: replace deprecated strncpy with strscpy init: replace deprecated strncpy with strscpy_pad Kees Cook (21): string: Prepare to merge strscpy_kunit.c into string_kunit.c string: Merge strscpy KUnit tests into string_kunit.c string: Prepare to merge strcat KUnit tests into string_kunit.c string: Merge strcat KUnit tests into string_kunit.c string: Convert KUnit test names to standard convention string.h: Introduce memtostr() and memtostr_pad() string_kunit: Move strtomem KUnit test to string_kunit.c MAINTAINERS: Add ubsan.h to the UBSAN section ubsan: Remove 1-element array usage in debug reporting ubsan: Avoid i386 UBSAN handler crashes with Clang scsi: mptfusion: Avoid possible run-time warning with long manufacturer strings scsi: mpi3mr: Avoid possible run-time warning with long manufacturer strings scsi: qla2xxx: Avoid possible run-time warning with long model_num kunit/fortify: Fix mismatched kvalloc()/vfree() usage kunit/fortify: Rename tests to use recommended conventions kunit/fortify: Do not spam logs with fortify WARNs kunit/fortify: Add memcpy() tests lkdtm: Disable CFI checking for perms functions hardening: Enable KCFI and some other options kunit/fortify: Fix replaced failure path to unbreak __alloc_size string: Add additional __realloc_size() annotations for "dup" helpers Thomas Weißschuh (1): stackleak: Use a copy of the ctl_table argument MAINTAINERS | 3 +- arch/arm64/configs/hardening.config | 1 + arch/x86/configs/hardening.config | 3 + drivers/message/fusion/mptsas.c | 14 +- drivers/misc/lkdtm/Makefile | 2 +- drivers/misc/lkdtm/perms.c | 2 +- drivers/scsi/mpi3mr/mpi3mr_transport.c | 14 +- drivers/scsi/qla2xxx/qla_mr.c | 6 +- drivers/virt/acrn/ioreq.c | 2 +- fs/ecryptfs/crypto.c | 4 +- fs/ecryptfs/main.c | 26 +- fs/hfsplus/xattr.c | 22 +- fs/reiserfs/item_ops.c | 13 +- include/linux/fortify-string.h | 9 +- include/linux/string.h | 62 ++++- include/uapi/linux/stddef.h | 8 + init/do_mounts.c | 3 +- kernel/configs/hardening.config | 8 + kernel/stackleak.c | 6 +- lib/Kconfig.debug | 10 - lib/Makefile | 2 - lib/fortify_kunit.c | 222 ++++++++++++---- lib/memcpy_kunit.c | 53 ---- lib/strcat_kunit.c | 104 -------- lib/string_kunit.c | 461 ++++++++++++++++++++++++++++++++- lib/strscpy_kunit.c | 142 ---------- lib/ubsan.h | 43 +-- 27 files changed, 768 insertions(+), 477 deletions(-) delete mode 100644 lib/strcat_kunit.c delete mode 100644 lib/strscpy_kunit.c -- Kees Cook