linux-kernel - RE: [PATCH 2/3] x86/mce: Avoid infinite loop for copy from user recovery

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Date:   Fri, 30 Jul 2021 23:30:02 -0700
From:   Jue Wang <juew@...gle.com>
To:     "Luck, Tony" <tony.luck@...el.com>
Cc:     Borislav Petkov <bp@...en8.de>, dinghui@...gfor.com.cn,
        huangcun@...gfor.com.cn, Jue Wang <juew@...gle.com>,
        linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org,
        HORIGUCHI NAOYA(堀口 直也) 
        <naoya.horiguchi@....com>, Oscar Salvador <osalvador@...e.de>,
        x86 <x86@...nel.org>, "Song, Youquan" <youquan.song@...el.com>
Subject: RE: [PATCH 2/3] x86/mce: Avoid infinite loop for copy from user recovery

Been busy with some other work.

After cherry picking patch 1 & 2, I saw the following with 2 UC errors injected
into the user space buffer passed into write(2), as expected:

[  287.994754] Kernel panic - not syncing: Machine checks to different
user pages

The kernel tested with has its x86/mce and mm/memory-failure aligned with
upstream till around 2020/11.

Is there any other patch that I have missed to the write syscall etc?

Thanks,
-Jue