Re: [PATCH] lib/dynamic_queue_limits.c: relax BUG_ON to WARN_ON in dql_complete()

[Ard Biesheuvel]

On 19 October 2017 at 11:57, David Miller <davem@xxxxxxxxxxxxx> wrote:
> From: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
> Date: Wed, 18 Oct 2017 16:45:15 +0100
>
>> Even though calling dql_completed() with a count that exceeds the
>> queued count is a serious error, it still does not justify bringing
>> down the entire kernel with a BUG_ON(). So relax it to a WARN_ON()
>> instead.
>>
>> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
>
> This is bogus.
>
> Unless you are going to do all of the work necessary to fix
> the out-of-bounds condition here, you cannot safely continue
> into the rest of this function.
>
> Things are going to explode in many places if you don't, at
> a minimum, fix the 'count' value to be in range.
>
> But like others I don't like this, the driver needs to be fixed
> urgently if this condition triggers.
>
> Sorry I'm not applying this.

Fair enough.