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From: Thomas Gleixner <tglx@linutronix.de>
To: Kuan-Wei Chiu <visitorckw@gmail.com>,
	anup@brainfault.org, paul.walmsley@sifive.com,
	palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr,
	maz@kernel.org
Cc: jserv@ccns.ncku.edu.tw, linux-riscv@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	Kuan-Wei Chiu <visitorckw@gmail.com>,
	kernel test robot <lkp@intel.com>,
	Dan Carpenter <error27@gmail.com>
Subject: Re: [PATCH] irqchip/riscv-imsic: Fix 'imsic' dereferenced before NULL check
Date: Sun, 03 Aug 2025 00:19:24 +0200	[thread overview]
Message-ID: <87ms8hgydv.ffs@tglx> (raw)
In-Reply-To: <20250801172459.94708-1-visitorckw@gmail.com>

On Sat, Aug 02 2025 at 01:24, Kuan-Wei Chiu wrote:
> Smatch reported a warning in imsic_irqdomain_init():
>
> drivers/irqchip/irq-riscv-imsic-platform.c:317 imsic_irqdomain_init() warn: variable dereferenced before check 'imsic' (see line 311)
>
> The variable imsic was dereferenced before being checked for NULL.
> To fix this, move the initialization of struct irq_domain_info after
> the NULL check to avoid accessing imsic prematurely.

It's fixed already w/o moving the struct into the middle of the code:

https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?h=irq/urgent

But thanks a lot for caring!

Thanks,

        tglx

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http://lists.infradead.org/mailman/listinfo/linux-riscv

WARNING: multiple messages have this Message-ID (diff)
From: Thomas Gleixner <tglx@linutronix.de>
To: Kuan-Wei Chiu <visitorckw@gmail.com>,
	anup@brainfault.org, paul.walmsley@sifive.com,
	palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr,
	maz@kernel.org
Cc: jserv@ccns.ncku.edu.tw, linux-riscv@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	Kuan-Wei Chiu <visitorckw@gmail.com>,
	kernel test robot <lkp@intel.com>,
	Dan Carpenter <error27@gmail.com>
Subject: Re: [PATCH] irqchip/riscv-imsic: Fix 'imsic' dereferenced before NULL check
Date: Sun, 03 Aug 2025 00:19:24 +0200	[thread overview]
Message-ID: <87ms8hgydv.ffs@tglx> (raw)
In-Reply-To: <20250801172459.94708-1-visitorckw@gmail.com>

On Sat, Aug 02 2025 at 01:24, Kuan-Wei Chiu wrote:
> Smatch reported a warning in imsic_irqdomain_init():
>
> drivers/irqchip/irq-riscv-imsic-platform.c:317 imsic_irqdomain_init() warn: variable dereferenced before check 'imsic' (see line 311)
>
> The variable imsic was dereferenced before being checked for NULL.
> To fix this, move the initialization of struct irq_domain_info after
> the NULL check to avoid accessing imsic prematurely.

It's fixed already w/o moving the struct into the middle of the code:

https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?h=irq/urgent

But thanks a lot for caring!

Thanks,

        tglx

  reply	other threads:[~2025-08-02 22:19 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-08-01 17:24 [PATCH] irqchip/riscv-imsic: Fix 'imsic' dereferenced before NULL check Kuan-Wei Chiu
2025-08-01 17:24 ` Kuan-Wei Chiu
2025-08-02 22:19 ` Thomas Gleixner [this message]
2025-08-02 22:19   ` Thomas Gleixner

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