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From: Yeoreum Yun <yeoreum.yun@arm.com>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com,
	dvyukov@google.com, vincenzo.frascino@arm.com,
	kpm@linux-foundation.org, clrkwllms@kernel.org,
	rostedt@goodmis.org, byungchul@sk.com,
	max.byungchul.park@gmail.com, kasan-dev@googlegroups.com,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	linux-rt-devel@lists.linux.dev, nd@arm.com,
	Yunseong Kim <ysk@kzalloc.com>
Subject: Re: [PATCH] kasan: don't call find_vm_area() in in_interrupt() for possible deadlock
Date: Mon, 7 Jul 2025 09:07:58 +0100	[thread overview]
Message-ID: <aGuAXup8Zap5pvMB@e129823.arm.com> (raw)
In-Reply-To: <20250707075946.2lAwc0OR@linutronix.de>

Hi Sebastian,

> On 2025-07-01 21:35:45 [+0100], Yeoreum Yun wrote:
> > diff --git a/mm/kasan/report.c b/mm/kasan/report.c
> > index 8357e1a33699..61c590e8005e 100644
> > --- a/mm/kasan/report.c
> > +++ b/mm/kasan/report.c
> > @@ -387,7 +387,7 @@ static inline struct vm_struct *kasan_find_vm_area(void *addr)
> >  	static DEFINE_WAIT_OVERRIDE_MAP(vmalloc_map, LD_WAIT_SLEEP);
> >  	struct vm_struct *va;
> >
> > -	if (IS_ENABLED(CONFIG_PREEMPT_RT))
> > +	if (IS_ENABLED(CONFIG_PREEMPT_RT) || in_interrupt())
>
> Could we stick to irq_count() ?

I determine to remove kasan_find_vm_area() since there's some case
couldn't be avoid with irq_count()

Please see the latest discussion:
 https://lore.kernel.org/all/20250703181018.580833-1-yeoreum.yun@arm.com/

Thanks ;)

--
Sincerely,
Yeoreum Yun

      reply	other threads:[~2025-07-07  8:08 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-07-01 20:35 [PATCH] kasan: don't call find_vm_area() in in_interrupt() for possible deadlock Yeoreum Yun
2025-07-02  6:01 ` Byungchul Park
2025-07-02  6:09   ` Byungchul Park
2025-07-02  6:28     ` Yeoreum Yun
2025-07-02 15:46 ` Andrey Ryabinin
2025-07-02 16:04   ` Yeoreum Yun
2025-07-03 17:10     ` Andrey Ryabinin
2025-07-03 18:07       ` Yeoreum Yun
2025-07-07  7:59 ` Sebastian Andrzej Siewior
2025-07-07  8:07   ` Yeoreum Yun [this message]

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