linux-kernel - Re: [PATCH] arm: Show real address of stack limit in _

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Date:   Mon, 27 Dec 2021 09:56:47 +0800
From:   He Ying <heying24@...wei.com>
To:     <rmk+kernel@...linux.org.uk>, <arnd@...db.de>, <ardb@...nel.org>,
        <akpm@...ux-foundation.org>, <maninder1.s@...sung.com>,
        <wangkefeng.wang@...wei.com>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm: Show real address of stack limit in __die()

Ping. Any ideas about this patch?

在 2021/12/2 14:19, He Ying 写道:
> Printing real address of stack limit makes debug easier.
> And system is dying, there is no security risk to show real
> address.
>
> Signed-off-by: He Ying <heying24@...wei.com>
> ---
>   arch/arm/kernel/traps.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
> index 195dff58bafc..7d7c86d00482 100644
> --- a/arch/arm/kernel/traps.c
> +++ b/arch/arm/kernel/traps.c
> @@ -273,7 +273,7 @@ static int __die(const char *str, int err, struct pt_regs *regs)
>   	print_modules();
>   	__show_regs(regs);
>   	__show_regs_alloc_free(regs);
> -	pr_emerg("Process %.*s (pid: %d, stack limit = 0x%p)\n",
> +	pr_emerg("Process %.*s (pid: %d, stack limit = 0x%px)\n",
>   		 TASK_COMM_LEN, tsk->comm, task_pid_nr(tsk), end_of_stack(tsk));
>   
>   	if (!user_mode(regs) || in_interrupt()) {