linux-kernel - [RFC PATCH v2 0/2] Fix uprobe anon page be overwritten during mremap

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Message-Id: <20250527132351.2050820-1-pulehui@huaweicloud.com>
Date: Tue, 27 May 2025 13:23:49 +0000
From: Pu Lehui <pulehui@...weicloud.com>
To: mhiramat@...nel.org,
	oleg@...hat.com,
	peterz@...radead.org,
	akpm@...ux-foundation.org,
	Liam.Howlett@...cle.com,
	lorenzo.stoakes@...cle.com,
	vbabka@...e.cz,
	jannh@...gle.com,
	pfalcato@...e.de
Cc: linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	pulehui@...wei.com
Subject: [RFC PATCH v2 0/2] Fix uprobe anon page be overwritten during mremap

From: Pu Lehui <pulehui@...wei.com>

patch 1: the mainly fix for uprobe anon page be overwritten issue.
patch 2: WARN_ON_ONCE for new_pte not NULL during move_ptes.

RFC v2:
- skip uprobe_mmap on expanded vma.
- add skip_vma_uprobe field to struct vma_prepare and
  vma_merge_struct. (Lorenzo)
- add WARN_ON_ONCE when new_pte is not NULL. (Oleg)
- Corrected some of the comments.

RFC v1:
https://lore.kernel.org/all/20250521092503.3116340-1-pulehui@huaweicloud.com/

Pu Lehui (2):
  mm/mremap: Fix uprobe anon page be overwritten when expanding vma
    during mremap
  mm/mremap: Expose abnormal new_pte during move_ptes

 mm/mremap.c | 2 ++
 mm/vma.c    | 7 ++++++-
 mm/vma.h    | 7 +++++++
 3 files changed, 15 insertions(+), 1 deletion(-)

-- 
2.34.1