linux-kernel - Re: [PATCH v6 0/2] x86/fred: Prevent immediate repeat of single step trap on return from SIGTRAP handler

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Message-ID: <a31448d0-bc0a-4bc9-8edd-1986ff5244bc@intel.com>
Date: Mon, 9 Jun 2025 09:34:27 -0700
From: Sohil Mehta <sohil.mehta@...el.com>
To: "Xin Li (Intel)" <xin@...or.com>, <linux-kernel@...r.kernel.org>,
	<linux-kselftest@...r.kernel.org>
CC: <tglx@...utronix.de>, <mingo@...hat.com>, <bp@...en8.de>,
	<dave.hansen@...ux.intel.com>, <x86@...nel.org>, <hpa@...or.com>,
	<shuah@...nel.org>, <andrew.cooper3@...rix.com>, <stable@...r.kernel.org>
Subject: Re: [PATCH v6 0/2] x86/fred: Prevent immediate repeat of single step
 trap on return from SIGTRAP handler

On 6/9/2025 1:40 AM, Xin Li (Intel) wrote:
> 
> Xin Li (Intel) (2):
>   x86/fred/signal: Prevent immediate repeat of single step trap on
>     return from SIGTRAP handler
>   selftests/x86: Add a test to detect infinite SIGTRAP handler loop
> 

I see that Dave just applied the patches. Sending this out anyway since
I was done reviewing them.

Reviewed-by: Sohil Mehta <sohil.mehta@...el.com>


>  arch/x86/include/asm/sighandling.h         |  22 +++++
>  arch/x86/kernel/signal_32.c                |   4 +
>  arch/x86/kernel/signal_64.c                |   4 +
>  tools/testing/selftests/x86/Makefile       |   2 +-
>  tools/testing/selftests/x86/sigtrap_loop.c | 101 +++++++++++++++++++++
>  5 files changed, 132 insertions(+), 1 deletion(-)
>  create mode 100644 tools/testing/selftests/x86/sigtrap_loop.c
> 
> 
> base-commit: dd2922dcfaa3296846265e113309e5f7f138839f