linux-ext4 - Re: [aarch64] Kernel crash on v5.1-rc5, __arch_copy_from

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Date:   Sun, 21 Apr 2019 06:28:40 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     Qu Wenruo <quwenruo.btrfs@....com>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Ext4 <linux-ext4@...r.kernel.org>,
        Linux FS Devel <linux-fsdevel@...r.kernel.org>
Subject: Re: [aarch64] Kernel crash on v5.1-rc5,
 __arch_copy_from_user+0x1bc/0x240

On Sun, Apr 21, 2019 at 05:12:50PM +0800, Qu Wenruo wrote:
> 
> 
> On 2019/4/21 下午4:20, Qu Wenruo wrote:
> > Hi,
> > 
> > Just hit one crash on v5.1-rc5 kernel, on ext4 filesystem.
> 
> Well, also hit the same one in v5.0.8 kernel.
> 
> Exact the same backtrace.
> 
> Really not sure which part is to blame, ARM or ext4?

You probably have faulty hardware:

https://community.arm.com/developer/ip-products/processors/f/cortex-a-forum/3205/re-what-is-serror-detailed-explanation-is-required