linux-kernel - Re: [cdrom_check_status] BUG: unable to handle kernel NULL pointer dereference at 000001c0

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Message-ID: <1510072170.2656.19.camel@wdc.com>
Date:   Tue, 7 Nov 2017 16:29:31 +0000
From:   Bart Van Assche <Bart.VanAssche@....com>
To:     "fengguang.wu@...el.com" <fengguang.wu@...el.com>,
        "linux-ide@...r.kernel.org" <linux-ide@...r.kernel.org>
CC:     "torvalds@...ux-foundation.org" <torvalds@...ux-foundation.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Bart Van Assche <Bart.VanAssche@....com>,
        "bp@...en8.de" <bp@...en8.de>, "axboe@...nel.dk" <axboe@...nel.dk>
Subject: Re: [cdrom_check_status] BUG: unable to handle kernel NULL pointer
 dereference at 000001c0

On Tue, 2017-11-07 at 18:25 +0800, Fengguang Wu wrote:
> [   22.666764] BUG: unable to handle kernel NULL pointer dereference at 000001c0
> [   22.666773] IP: cdrom_check_status+0x2c/0x90

If it is a regression then this patch might fix this kernel oops:

https://www.mail-archive.com/linux-block@vger.kernel.org/msg15155.html

Bart.