From: Kees Cook <kees@kernel.org>
To: Andrew Pinski <andrew.pinski@oss.qualcomm.com>
Cc: Kees Cook <kees@kernel.org>, Uros Bizjak <ubizjak@gmail.com>,
Joseph Myers <josmyers@redhat.com>,
Richard Biener <rguenther@suse.de>,
Jeff Law <jeffreyalaw@gmail.com>,
Andrew Pinski <pinskia@gmail.com>,
Jakub Jelinek <jakub@redhat.com>,
Martin Uecker <uecker@tugraz.at>,
Peter Zijlstra <peterz@infradead.org>,
Ard Biesheuvel <ardb@kernel.org>, Jan Hubicka <hubicka@ucw.cz>,
Richard Earnshaw <richard.earnshaw@arm.com>,
Richard Sandiford <richard.sandiford@arm.com>,
Marcus Shawcroft <marcus.shawcroft@arm.com>,
Kyrylo Tkachov <kyrylo.tkachov@arm.com>,
Kito Cheng <kito.cheng@gmail.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Andrew Waterman <andrew@sifive.com>,
Jim Wilson <jim.wilson.gcc@gmail.com>,
Dan Li <ashimida.1990@gmail.com>,
Sami Tolvanen <samitolvanen@google.com>,
Ramon de C Valle <rcvalle@google.com>,
Joao Moreira <joao@overdrivepizza.com>,
Nathan Chancellor <nathan@kernel.org>,
Bill Wendling <morbo@google.com>,
"Osterlund, Sebastian" <sebastian.osterlund@intel.com>,
"Constable, Scott D" <scott.d.constable@intel.com>,
gcc-patches@gcc.gnu.org, linux-hardening@vger.kernel.org
Subject: [PATCH v11 0/7] Introduce Kernel Control Flow Integrity ABI [PR107048]
Date: Mon, 11 May 2026 12:48:44 -0700 [thread overview]
Message-ID: <20260511194847.faster.180-kees@kernel.org> (raw)
Hi,
This series implements[1][2] the Linux Kernel Control Flow Integrity
ABI, which provides a function prototype based forward edge control flow
integrity protection by instrumenting every indirect call to check for
a hash value before the target function address. If the hash at the call
site and the hash at the target do not match, execution will trap.
I was asked to wait to resend this series until gcc 16 released, which
it has now. I'm hoping we can land the front-, middle-, and back-ends
for aarch64 and x86_64. I'd really like to get this in a position where
more people can test with GCC snapshots, etc. Since I don't have commit
access, who is the right person to commit this?
Thanks!
-Kees
Changes since v10[3]:
- Rebase to latest.
- Update tests to aarch64 brk instruction immediate printing in hex.
[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107048
[2] https://github.com/KSPP/linux/issues/369
[3] https://lore.kernel.org/linux-hardening/20260107200301.better.465-kees@kernel.org/
Kees Cook (7):
typeinfo: Introduce KCFI typeinfo mangling API
kcfi: Add core Kernel Control Flow Integrity infrastructure
kcfi: Add regression test suite
x86: Add x86_64 Kernel Control Flow Integrity implementation
aarch64: Add AArch64 Kernel Control Flow Integrity implementation
arm: Add ARM 32-bit Kernel Control Flow Integrity implementation
riscv: Add RISC-V Kernel Control Flow Integrity implementation
gcc/kcfi.h | 59 ++
gcc/kcfi.cc | 696 ++++++++++++++
gcc/config/aarch64/aarch64-protos.h | 4 +
gcc/config/arm/arm-protos.h | 4 +
gcc/config/i386/i386-protos.h | 2 +-
gcc/config/i386/i386.h | 3 +-
gcc/config/riscv/riscv-protos.h | 3 +
gcc/config/aarch64/aarch64.md | 56 ++
gcc/config/arm/arm.md | 62 ++
gcc/config/i386/i386.md | 63 +-
gcc/config/riscv/riscv.md | 76 +-
gcc/config/aarch64/aarch64.cc | 93 ++
gcc/config/arm/arm.cc | 170 ++++
gcc/config/i386/i386-expand.cc | 22 +-
gcc/config/i386/i386.cc | 210 ++++-
gcc/config/riscv/riscv.cc | 180 ++++
gcc/doc/extend.texi | 137 +++
gcc/doc/invoke.texi | 127 +++
gcc/doc/tm.texi | 32 +
gcc/testsuite/gcc.dg/kcfi/kcfi.exp | 51 ++
gcc/testsuite/lib/target-supports.exp | 14 +
.../gcc.dg/builtin-typeinfo-errors.c | 28 +
gcc/testsuite/gcc.dg/builtin-typeinfo.c | 350 +++++++
.../gcc.dg/kcfi/kcfi-aarch64-ilp32.c | 7 +
gcc/testsuite/gcc.dg/kcfi/kcfi-adjacency.c | 114 +++
gcc/testsuite/gcc.dg/kcfi/kcfi-arm-fixed-ip.c | 15 +
.../gcc.dg/kcfi/kcfi-arm-fixed-r12.c | 15 +
gcc/testsuite/gcc.dg/kcfi/kcfi-basics.c | 149 +++
gcc/testsuite/gcc.dg/kcfi/kcfi-call-sharing.c | 90 ++
.../gcc.dg/kcfi/kcfi-cold-partition.c | 126 +++
.../gcc.dg/kcfi/kcfi-complex-addressing.c | 203 ++++
.../gcc.dg/kcfi/kcfi-complex-addressing.s | 0
.../gcc.dg/kcfi/kcfi-ipa-robustness.c | 54 ++
.../gcc.dg/kcfi/kcfi-move-preservation.c | 118 +++
.../gcc.dg/kcfi/kcfi-no-sanitize-inline.c | 100 ++
gcc/testsuite/gcc.dg/kcfi/kcfi-no-sanitize.c | 39 +
.../gcc.dg/kcfi/kcfi-offset-validation.c | 38 +
.../gcc.dg/kcfi/kcfi-patchable-entry-only.c | 64 ++
.../gcc.dg/kcfi/kcfi-patchable-incompatible.c | 7 +
.../gcc.dg/kcfi/kcfi-patchable-large.c | 54 ++
.../gcc.dg/kcfi/kcfi-patchable-medium.c | 60 ++
.../gcc.dg/kcfi/kcfi-patchable-prefix-only.c | 61 ++
gcc/testsuite/gcc.dg/kcfi/kcfi-riscv-32bit.c | 7 +
.../gcc.dg/kcfi/kcfi-riscv-fixed-t1.c | 7 +
.../gcc.dg/kcfi/kcfi-riscv-fixed-t2.c | 7 +
.../gcc.dg/kcfi/kcfi-riscv-fixed-t3.c | 7 +
gcc/testsuite/gcc.dg/kcfi/kcfi-runtime.c | 276 ++++++
gcc/testsuite/gcc.dg/kcfi/kcfi-tail-calls.c | 140 +++
.../gcc.dg/kcfi/kcfi-trap-encoding.c | 70 ++
gcc/testsuite/gcc.dg/kcfi/kcfi-trap-section.c | 29 +
gcc/testsuite/gcc.dg/kcfi/kcfi-x86-32bit.c | 7 +
gcc/testsuite/gcc.dg/kcfi/kcfi-x86-arity.c | 93 ++
.../gcc.dg/kcfi/kcfi-x86-fixed-r10.c | 7 +
.../gcc.dg/kcfi/kcfi-x86-fixed-r11.c | 7 +
.../gcc.dg/kcfi/kcfi-x86-retpoline-r11.c | 40 +
gcc/Makefile.in | 2 +
gcc/c-family/c-common.h | 1 +
gcc/flag-types.h | 2 +
gcc/gimple.h | 22 +
gcc/kcfi-typeinfo.h | 32 +
gcc/selftest.h | 1 +
gcc/tree-pass.h | 1 +
gcc/c-family/c-attribs.cc | 17 +-
gcc/c-family/c-common.cc | 2 +
gcc/c/c-parser.cc | 72 ++
gcc/common.opt | 8 +
gcc/df-scan.cc | 7 +
gcc/doc/tm.texi.in | 12 +
gcc/final.cc | 3 +
gcc/kcfi-typeinfo.cc | 866 ++++++++++++++++++
gcc/opts.cc | 2 +
gcc/passes.cc | 1 +
gcc/passes.def | 1 +
gcc/rtl.def | 6 +
gcc/rtlanal.cc | 5 +
gcc/selftest-run-tests.cc | 1 +
gcc/target.def | 39 +
gcc/toplev.cc | 12 +
gcc/tree-inline.cc | 10 +
gcc/varasm.cc | 37 +-
80 files changed, 5571 insertions(+), 44 deletions(-)
create mode 100644 gcc/kcfi.h
create mode 100644 gcc/kcfi.cc
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi.exp
create mode 100644 gcc/testsuite/gcc.dg/builtin-typeinfo-errors.c
create mode 100644 gcc/testsuite/gcc.dg/builtin-typeinfo.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-aarch64-ilp32.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-adjacency.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-arm-fixed-ip.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-arm-fixed-r12.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-basics.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-call-sharing.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-cold-partition.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-complex-addressing.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-complex-addressing.s
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-ipa-robustness.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-move-preservation.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-no-sanitize-inline.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-no-sanitize.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-offset-validation.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-patchable-entry-only.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-patchable-incompatible.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-patchable-large.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-patchable-medium.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-patchable-prefix-only.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-riscv-32bit.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-riscv-fixed-t1.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-riscv-fixed-t2.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-riscv-fixed-t3.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-runtime.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-tail-calls.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-trap-encoding.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-trap-section.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-x86-32bit.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-x86-arity.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-x86-fixed-r10.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-x86-fixed-r11.c
create mode 100644 gcc/testsuite/gcc.dg/kcfi/kcfi-x86-retpoline-r11.c
create mode 100644 gcc/kcfi-typeinfo.h
create mode 100644 gcc/kcfi-typeinfo.cc
--
2.34.1
next reply other threads:[~2026-05-11 19:49 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-11 19:48 Kees Cook [this message]
2026-05-11 19:48 ` [PATCH v11 1/7] typeinfo: Introduce KCFI typeinfo mangling API Kees Cook
2026-05-11 20:08 ` Martin Uecker
2026-05-11 20:41 ` Kees Cook
2026-05-12 8:13 ` Martin Uecker
2026-05-12 8:35 ` Peter Zijlstra
2026-05-12 18:12 ` Martin Uecker
2026-05-12 18:25 ` Andrew Pinski
2026-05-11 19:48 ` [PATCH v11 2/7] kcfi: Add core Kernel Control Flow Integrity infrastructure Kees Cook
2026-05-11 19:48 ` [PATCH v11 3/7] kcfi: Add regression test suite Kees Cook
2026-05-11 19:48 ` [PATCH v11 4/7] x86: Add x86_64 Kernel Control Flow Integrity implementation Kees Cook
2026-05-11 19:48 ` [PATCH v11 5/7] aarch64: Add AArch64 " Kees Cook
2026-05-11 19:48 ` [PATCH v11 6/7] arm: Add ARM 32-bit " Kees Cook
2026-05-11 19:48 ` [PATCH v11 7/7] riscv: Add RISC-V " Kees Cook
2026-05-12 7:50 ` [PATCH v11 0/7] Introduce Kernel Control Flow Integrity ABI [PR107048] Peter Zijlstra
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