From: Markus Elfring <Markus.Elfring@web.de>
To: make24@iscas.ac.cn, linux-i2c@vger.kernel.org,
Andi Shyti <andi.shyti@kernel.org>,
Elie Morisse <syniurge@gmail.com>,
Shyam Sundar S K <Shyam-sundar.S-k@amd.com>,
Wolfram Sang <wsa@kernel.org>
Cc: stable@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH] i2c: fix reference leak in MP2 PCI device
Date: Sat, 27 Sep 2025 14:56:49 +0200 [thread overview]
Message-ID: <e6703b6c-0ae5-450a-ae3a-1ad899c8f374@web.de> (raw)
In-Reply-To: <20250927105729.19164-1-make24@iscas.ac.cn>
> In i2c_amd_probe(), amd_mp2_find_device() utilizes
> driver_find_next_device() which internally calls driver_find_device()
> to locate the matching device. driver_find_device() increments the
> reference count of the found device by calling get_device(), but
> amd_mp2_find_device() fails to call put_device() to decrement the
> reference count before returning. This results in a reference count
> leak of the PCI device each time i2c_amd_probe() is executed, which
> may prevent the device from being properly released and cause a memory
> leak.
How do you think about to increase the application of scope-based resource management?
https://elixir.bootlin.com/linux/v6.17-rc7/source/include/linux/device.h#L1180
Regards,
Markus
next prev parent reply other threads:[~2025-09-27 12:57 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-27 10:57 [PATCH] i2c: fix reference leak in MP2 PCI device Ma Ke
2025-09-27 12:56 ` Markus Elfring [this message]
2025-09-27 18:08 ` Greg KH
2025-09-28 3:29 ` kernel test robot
2025-09-28 5:34 ` kernel test robot
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