linux-kernel - [PATCH v3 0/1] arm64: ptrace: fix hw_break

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Message-ID: <20251016154401.35799-1-b10902118@ntu.edu.tw>
Date: Thu, 16 Oct 2025 23:44:00 +0800
From: Bill Tsui <b10902118@....edu.tw>
To: oleg@...hat.com,
	catalin.marinas@....com,
	will@...nel.org
Cc: nathan@...nel.org,
	nick.desaulniers+lkml@...il.com,
	morbo@...gle.com,
	justinstitt@...gle.com,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	llvm@...ts.linux.dev,
	Bill Tsui <b10902118@....edu.tw>
Subject: [PATCH v3 0/1] arm64: ptrace: fix hw_break_set() to set addr and ctrl together

After revisiting my patches a few weeks later, I have some additional
thoughts:

  1. Keep arm32 ptrace as it. Legacy APIs only need critical bug fix.
  2. For arm64 ptrace, the patch is not only a fix for 32-bit tracee
     but also a refactor that removes partially set state, making logic
	 clearer and preventing similar bugs.

The patch can be tested with the code in my previous mail:
https://lore.kernel.org/all/0fd573cc044584f00976c410955ed486@ntu.edu.tw/
---

Changes in v3:
- Remove patches for arm32 and compat ptrace
- Rewrite commit message
- Reformat the arg of the added function

Changes in v2:
- Fix username

Bill Tsui (1):
  arm64: ptrace: fix hw_break_set() to set addr and ctrl together

 arch/arm64/kernel/ptrace.c | 36 +++++++++++++++++++++++++++++++-----
 1 file changed, 31 insertions(+), 5 deletions(-)

-- 
2.51.0