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From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: Christophe Leroy <christophe.leroy@c-s.fr>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] powerpc/irq: fix stack overflow verification
Date: Wed, 18 Dec 2019 15:05:09 +1100 (AEDT)	[thread overview]
Message-ID: <47d1cj6QD8z9sS3@ozlabs.org> (raw)
In-Reply-To: <e033aa8116ab12b7ca9a9c75189ad0741e3b9b5f.1575872340.git.christophe.leroy@c-s.fr>

On Mon, 2019-12-09 at 06:19:08 UTC, Christophe Leroy wrote:
> Before commit 0366a1c70b89 ("powerpc/irq: Run softirqs off the top of
> the irq stack"), check_stack_overflow() was called by do_IRQ(), before
> switching to the irq stack.
> In that commit, do_IRQ() was renamed __do_irq(), and is now executing
> on the irq stack, so check_stack_overflow() has just become almost
> useless.
> 
> Move check_stack_overflow() call in do_IRQ() to do the check while
> still on the current stack.
> 
> Fixes: 0366a1c70b89 ("powerpc/irq: Run softirqs off the top of the irq stack")
> Cc: stable@vger.kernel.org
> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/099bc4812f09155da77eeb960a983470249c9ce1

cheers

      reply	other threads:[~2019-12-18  4:05 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-09  6:19 [PATCH] powerpc/irq: fix stack overflow verification Christophe Leroy
2019-12-18  4:05 ` Michael Ellerman [this message]

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