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From: Jackie Liu <liu.yun@linux.dev>
To: glider@google.com
Cc: dvyukov@google.com, elver@google.com, pjw@kernel.org,
	alex@ghiti.fr, aou@eecs.berkeley.edu,
	linux-riscv@lists.infradead.org, linux-mm@kvack.org,
	kasan-dev@googlegroups.com, muchun.song@linux.dev,
	liu.yun@linux.dev
Subject: [PATCH v2 0/3] kfence: fix pool allocation failure handling
Date: Thu, 29 Oct 2026 10:57:40 +0800	[thread overview]
Message-ID: <cover.1793242457.git.liuyun01@kylinos.cn> (raw)

From: Jackie Liu <liuyun01@kylinos.cn>

Fix the cleanup address and page reuse window in failed late KFENCE
initialization. Also let RISC-V boot if the early pool reservation fails.

Patch 2 depends on patch 1. Patch 3 can be applied independently.

Changes in v2:
- Add Marco Elver's Reviewed-by to patches 1 and 2; their code is unchanged.
- Drop the unused asm/kfence.h include from patch 3. Sashiko reported that
  its unconditional inclusion breaks RV32 and NOMMU builds.
- Credit Sashiko and kernel test robot with Reported-by and Closes tags
  in patch 3.

v1: https://lore.kernel.org/all/cover.1793017073.git.liuyun01@kylinos.cn/
Reports:
https://sashiko.dev/#/patchset/cover.1793017073.git.liuyun01@kylinos.cn?part=3
https://lore.kernel.org/all/sashiko-outbox-186543@kernel.org/
https://lore.kernel.org/oe-kbuild-all/202610290904.wbrEL97y-lkp@intel.com/

Validation on AArch64 Linux with Clang 17.0.6 and GNU ld 2.40:
- RV32 and NOMMU: reproduced v1 failures; v2 init.o builds successfully.
- RV64 defconfig with CONFIG_KFENCE=y: init.o, mm/kfence/core.o, and the
  full Image build pass without warnings.
The existing NOMMU warning in include/asm-generic/io.h is identical to
that from the unpatched base. No boot or failure-injection tests were run.
All three patches pass checkpatch.pl --strict and git diff --check.

OpenAI Codex assisted with review, adaptation, wording, and validation.

Jackie Liu (3):
  kfence: fix pool cleanup on metadata allocation failure
  kfence: clear the pool pointer before freeing pages
  riscv: keep booting if KFENCE pool reservation fails

 arch/riscv/include/asm/kfence.h |  4 +++-
 arch/riscv/mm/init.c            | 18 ++++++++++++++----
 mm/kfence/core.c                |  6 ++++--
 3 files changed, 21 insertions(+), 7 deletions(-)


base-commit: 7be4bc52fd9e0e55dc9a2e0232b89427d2c4b614
-- 
2.56.0


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http://lists.infradead.org/mailman/listinfo/linux-riscv

WARNING: multiple messages have this Message-ID (diff)
From: Jackie Liu <liu.yun@linux.dev>
To: glider@google.com
Cc: dvyukov@google.com, elver@google.com, pjw@kernel.org,
	alex@ghiti.fr, aou@eecs.berkeley.edu,
	linux-riscv@lists.infradead.org, linux-mm@kvack.org,
	kasan-dev@googlegroups.com, muchun.song@linux.dev,
	liu.yun@linux.dev
Subject: [PATCH v2 0/3] kfence: fix pool allocation failure handling
Date: Thu, 29 Oct 2026 10:57:40 +0800	[thread overview]
Message-ID: <cover.1793242457.git.liuyun01@kylinos.cn> (raw)

From: Jackie Liu <liuyun01@kylinos.cn>

Fix the cleanup address and page reuse window in failed late KFENCE
initialization. Also let RISC-V boot if the early pool reservation fails.

Patch 2 depends on patch 1. Patch 3 can be applied independently.

Changes in v2:
- Add Marco Elver's Reviewed-by to patches 1 and 2; their code is unchanged.
- Drop the unused asm/kfence.h include from patch 3. Sashiko reported that
  its unconditional inclusion breaks RV32 and NOMMU builds.
- Credit Sashiko and kernel test robot with Reported-by and Closes tags
  in patch 3.

v1: https://lore.kernel.org/all/cover.1793017073.git.liuyun01@kylinos.cn/
Reports:
https://sashiko.dev/#/patchset/cover.1793017073.git.liuyun01@kylinos.cn?part=3
https://lore.kernel.org/all/sashiko-outbox-186543@kernel.org/
https://lore.kernel.org/oe-kbuild-all/202610290904.wbrEL97y-lkp@intel.com/

Validation on AArch64 Linux with Clang 17.0.6 and GNU ld 2.40:
- RV32 and NOMMU: reproduced v1 failures; v2 init.o builds successfully.
- RV64 defconfig with CONFIG_KFENCE=y: init.o, mm/kfence/core.o, and the
  full Image build pass without warnings.
The existing NOMMU warning in include/asm-generic/io.h is identical to
that from the unpatched base. No boot or failure-injection tests were run.
All three patches pass checkpatch.pl --strict and git diff --check.

OpenAI Codex assisted with review, adaptation, wording, and validation.

Jackie Liu (3):
  kfence: fix pool cleanup on metadata allocation failure
  kfence: clear the pool pointer before freeing pages
  riscv: keep booting if KFENCE pool reservation fails

 arch/riscv/include/asm/kfence.h |  4 +++-
 arch/riscv/mm/init.c            | 18 ++++++++++++++----
 mm/kfence/core.c                |  6 ++++--
 3 files changed, 21 insertions(+), 7 deletions(-)


base-commit: 7be4bc52fd9e0e55dc9a2e0232b89427d2c4b614
-- 
2.56.0



             reply	other threads:[~2026-10-29  2:58 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-29  2:57 Jackie Liu [this message]
2026-10-29  2:57 ` [PATCH v2 0/3] kfence: fix pool allocation failure handling Jackie Liu
2026-10-29  2:57 ` [PATCH v2 1/3] kfence: fix pool cleanup on metadata allocation failure Jackie Liu
2026-10-29  2:57   ` Jackie Liu
2026-10-29  2:57 ` [PATCH v2 2/3] kfence: clear the pool pointer before freeing pages Jackie Liu
2026-10-29  2:57   ` Jackie Liu
2026-10-29  2:57 ` [PATCH v2 3/3] riscv: keep booting if KFENCE pool reservation fails Jackie Liu
2026-10-29  2:57   ` Jackie Liu
2026-10-30  2:58   ` sashiko-bot
2026-10-30  1:26 ` [PATCH v2 0/3] kfence: fix pool allocation failure handling Andrew Morton
2026-10-30  1:26   ` Andrew Morton
2026-10-30  5:55   ` Jackie Liu
2026-10-30  5:55     ` Jackie Liu
2026-10-30  6:55     ` Andrew Morton
2026-10-30  6:55       ` Andrew Morton

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