linux-kernel - drivers/clk/mediatek: suspected missing null check for return pointer of mtk_alloc_clk

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Message-ID: <TYCP286MB118864E74927A579396451588A849@TYCP286MB1188.JPNP286.PROD.OUTLOOK.COM>
Date:   Tue, 26 Oct 2021 07:14:43 +0000
From:   YE Chengfeng <cyeaa@...nect.ust.hk>
To:     "mturquette@...libre.com" <mturquette@...libre.com>,
        "sboyd@...nel.org" <sboyd@...nel.org>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: drivers/clk/mediatek: suspected missing null check for return pointer
 of mtk_alloc_clk_data

Hi,

https://github.com/torvalds/linux/blob/master/drivers/clk/mediatek/clk-mt7622.c#L622

The return pointer of mtk_alloc_clk_data could be null, but null check is missing. It seems like there could be a potential null-pointer dereference problem at #line 639 and so on. Would you like to spare some time to have a look at it?

Thanks so much,
Chengfeng