Messages in this thread Patch in this message | | | Date | Wed, 25 Nov 2009 21:20:06 +0800 | From | "Liuweni" <> | Subject | Re: [PATCH]irq/core:Add a length limitation |
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Hi Ingo, I don't know whether this situation happened in the past. I upload this code for code Integrity. The WARN_ON is set on OFF, While anybody use it, and set it ON.
Thank you for you suggestion. I modify the code and use scripts/checkpatch.pl and scripts/get_maintainer.pl on the patch. Please have a check later.
-------------- Best Regards, Liuweni 2009-11-25
发件人: Ingo Molnar 发送时间: 2009-11-24 22:45:38 收件人: Liuweni; Thomas Gleixner 抄送: linux-kernel; xgr178; Jiri Kosina; qingshenlwy 主题: Re: [PATCH]irq/core:Add a length limitation * Liuweni <qingshenlwy@gmail.com> wrote: > In the register_handler_proc(), the max length of irqaction->name is > MAX_NAMELEN. And this function will call name_unique() to compare name > with other irqs'. > > There is no any code for limitation the length. I add a warning in the > function to notice that the irqaction->name is too long. > > Signed-off-by: Liuwenyi <qingshenlwy@gmail.com> > --- > diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c > index 0832145..9ab6e04 100644 > --- a/kernel/irq/proc.c > +++ b/kernel/irq/proc.c > @@ -196,6 +196,9 @@ void register_handler_proc(unsigned int irq, struct irqaction *action) > char name [MAX_NAMELEN]; > struct irq_desc *desc = irq_to_desc(irq); > > + if(strlen(action->name) >= MAX_NAMELEN) > + WARN_ON(1); > + Has this situation happened in the past that requires this check to be added? The current limit of 128 chars is quite generous. Also, the check is buggy, it's off by 1. ( Also, please use scripts/checkpatch.pl on patches and please use 'scripts/get_maintainer.pl -f kernel/irq/proc.c' when constructing Cc: lines. ) Thanks, Ingo
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