linux-hardening - Re: [PATCH 0/3] dm-pcache: built-in support and metadata hardening

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Message-ID: <19a5409a3bf.50871c0e1607989.1264040958211475507@linux.beauty>
Date: Wed, 05 Nov 2025 20:41:49 +0800
From: Li Chen <me@...ux.beauty>
To: "Kees Cook" <kees@...nel.org>, "Nathan Chancellor" <nathan@...nel.org>,
	"Nicolas Schier" <nicolas.schier@...ux.dev>,
	"linux-kernel" <linux-kernel@...r.kernel.org>,
	"linux-hardening" <linux-hardening@...r.kernel.org>,
	"linux-kbuild" <linux-kbuild@...r.kernel.org>
Subject: Re: [PATCH 0/3] dm-pcache: built-in support and metadata hardening

My apologies, please disregard the dm-pcache portion of this series. This series will focus solely on gcc-plugin.

 ---- On Wed, 05 Nov 2025 16:46:51 +0800  Li Chen <me@...ux.beauty> wrote --- 
 > From: Li Chen <chenl311@...natelecom.cn>
 > 
 > This three-patch series tidies dm-pcache’s build glue and tightens the metadata scan.
 > 
 > Patch 1 allow dm-pcache to be linked into vmlinux and avoids clashing with the sunrpc
 > cache_flush() by using obj-$(CONFIG_DM_PCACHE) and renaming the helper across the tree.
 > 
 > Patch 2 drops a redundant recomputation of the metadata slot pointer while walking headers.
 > 
 > Patch 3 zero-allocates a temporary buffer so callers never see stale metadata,
 > relies on __free(kvfree) for cleanup, and only copies back once a valid record is found.
 > 
 > Thanks for your review.
 > 
 > Li Chen (3):
 >   dm-pcache: allow built-in build and rename flush helper
 >   dm-pcache: reuse meta_addr in pcache_meta_find_latest
 >   dm-pcache: avoid leaking invalid metadata in pcache_meta_find_latest()
 > 
 >  drivers/md/dm-pcache/Makefile          |  2 +-
 >  drivers/md/dm-pcache/cache.c           |  2 +-
 >  drivers/md/dm-pcache/cache.h           |  2 +-
 >  drivers/md/dm-pcache/cache_req.c       |  6 +++---
 >  drivers/md/dm-pcache/pcache_internal.h | 15 ++++++++++-----
 >  5 files changed, 16 insertions(+), 11 deletions(-)
 > 
 > -- 
 > 2.51.0
 > 
 > 
Regards,

Li