linux-kernel - Re: WARNING: CPU: 1 PID: 67 at drivers/ata/libata-core.c:1688 ata_read_log

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Date:   Mon, 24 Jul 2023 13:54:20 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Niklas Cassel <nks@...wful.org>
Cc:     linux-ide@...r.kernel.org, Damien Le Moal <dlemoal@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Hannes Reinecke <hare@...e.de>
Subject: Re: WARNING: CPU: 1 PID: 67 at drivers/ata/libata-core.c:1688
 ata_read_log_page+0x173/0x1f0

+ hare.

On Mon, Jul 24, 2023 at 01:51:19PM +0200, Niklas Cassel wrote:
> Hello Boris,
> 
> this is a null pointer dereference,
> because ap->ncq_sense_buf buffer is only allocated when CDL is enabled.
> 
> We are not supposed to fetch sense data for successful NCQ commands when
> CDL is not enabled.
> 
> This is my bad.
> Could you please test and see if this patch solves your problem:
> https://lore.kernel.org/linux-ide/20230723130315.427513-1-nks@flawful.org/

Yap, saw it, thanks.

I'll be able to get to it towards the end of the week.

Will let you know,

Thx.

-- 
Regards/Gruss,
    Boris.

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