linux-kernel - Re: [PATCH] qe_ic: fix a buffer overflow error and add check elsewhere

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Date:	Tue, 26 Jan 2016 18:31:49 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Zhao Qiang <qiang.zhao@....com>
cc:	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	leoyang.li@....com, oss@...error.net, xiaobo.xie@....com
Subject: Re: [PATCH] qe_ic: fix a buffer overflow error and add check
 elsewhere

On Thu, 21 Jan 2016, Zhao Qiang wrote:

> 127 is the theoretical up boundary of QEIC number,
> in fact there only be 44 qe_ic_info now.
> add check to overflow for qe_ic_info

How do you trigger that overflow? The above does not explain WHY we need these
checks.

> diff --git a/drivers/soc/fsl/qe/qe_ic.c b/drivers/soc/fsl/qe/qe_ic.c
> index 5419527..90c00b7 100644
> --- a/drivers/soc/fsl/qe/qe_ic.c
> +++ b/drivers/soc/fsl/qe/qe_ic.c

Sigh. Another dump ground for SOC stuff? irq chip drivers belong into
drivers/irqchip.

Thanks,

	tglx