[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <87fs1bxe9h.wl-maz@kernel.org>
Date: Sun, 12 Nov 2023 14:00:42 +0000
From: Marc Zyngier <maz@...nel.org>
To: Paran Lee <p4ranlee@...il.com>
Cc: Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org,
shjy180909@...il.com, austindh.kim@...il.com
Subject: Re: [PATCH] irqdesc: Fail check on early_irq_init allocation.
On Sat, 11 Nov 2023 17:00:36 +0000,
Paran Lee <p4ranlee@...il.com> wrote:
>
> When doing start_kernel(),
> On early_irq_init(), alloc_desc() or alloc_percpu()
> may be fails. So, Explicit fail check needed on dynamic allocation.
A failing allocation already results in a massive splat describing how
the allocation failed. Further use of the NULL pointer will also
result in a terminal oops, particularly if this happens this early in
the boot sequence.
So what do these BUG_ON() calls buy us?
M.
--
Without deviation from the norm, progress is not possible.
Powered by blists - more mailing lists