linux-kernel - Re: [PATCH] ARM: fix the incorrect value of sp in _

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Date:   Mon, 18 Apr 2022 16:36:09 +0800
From:   songyuanzheng <songyuanzheng@...wei.com>
To:     "Russell King (Oracle)" <linux@...linux.org.uk>
CC:     <ardb@...nel.org>, <arnd@...db.de>, <linus.walleij@...aro.org>,
        <akpm@...ux-foundation.org>, <ebiederm@...ssion.com>,
        <wangkefeng.wang@...wei.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ARM: fix the incorrect value of sp in __die()

Thanks for your reply.

I didn't fully understand these code, please ignore this patch.

Thanks.

On 2022/4/18 16:03, Russell King (Oracle) wrote:
> Insufficient stack space to handle exception!
> Task stack:     [0xf09dc000..0xf09de000]
> IRQ stack:      [0xf0800000..0xf0802000]
> Overflow stack: [0xc210e000..0xc210f000]
> Internal error: kernel stack overflow: 0 [#1] SMP ARM
> Modules linked in:
> CPU: 0 PID: 81 Comm: sh Not tainted 5.18.0-rc3 #4
> Hardware name: ARM-Versatile Express
> PC is at mmioset+0x20/0xa8
> LR is at recursive_loop+0x34/0x9c
> pc : [<c0777080>]    lr : [<c0a90c6c>]    psr: 20000013
> sp : f09dbf48  ip : f09dbf4c  fp : 00219644
> ...
> Stack: (0xf09dbf48 to 0xf09de000)