linux-kernel - RE: [PATCH v3] clk: imx: Fix an out-of-bounds access in dispmix_csr_clk_dev

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Message-ID:
 <PAXPR04MB845926715E9311F30E5BFDEE887CA@PAXPR04MB8459.eurprd04.prod.outlook.com>
Date: Fri, 20 Jun 2025 00:29:46 +0000
From: Peng Fan <peng.fan@....com>
To: Xiaolei Wang <xiaolei.wang@...driver.com>, "abelvesa@...nel.org"
	<abelvesa@...nel.org>, Frank Li <frank.li@....com>, "mturquette@...libre.com"
	<mturquette@...libre.com>, "sboyd@...nel.org" <sboyd@...nel.org>,
	"shawnguo@...nel.org" <shawnguo@...nel.org>, "s.hauer@...gutronix.de"
	<s.hauer@...gutronix.de>, "kernel@...gutronix.de" <kernel@...gutronix.de>,
	"festevam@...il.com" <festevam@...il.com>
CC: "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
	"imx@...ts.linux.dev" <imx@...ts.linux.dev>,
	"linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v3] clk: imx: Fix an out-of-bounds access in
 dispmix_csr_clk_dev_data

> Subject: [PATCH v3] clk: imx: Fix an out-of-bounds access in
> dispmix_csr_clk_dev_data
> 
> When num_parents is 4, __clk_register() occurs an out-of-bounds when
> accessing parent_names member. Use ARRAY_SIZE() instead of
> hardcode number here.
> 
>  BUG: KASAN: global-out-of-bounds in __clk_register+0x1844/0x20d8
> Read of size 8 at addr ffff800086988e78 by task kworker/u24:3/59
>   Hardware name: NXP i.MX95 19X19 board (DT)
>   Workqueue: events_unbound deferred_probe_work_func
>   Call trace:
>     dump_backtrace+0x94/0xec
>     show_stack+0x18/0x24
>     dump_stack_lvl+0x8c/0xcc
>     print_report+0x398/0x5fc
>     kasan_report+0xd4/0x114
>     __asan_report_load8_noabort+0x20/0x2c
>     __clk_register+0x1844/0x20d8
>     clk_hw_register+0x44/0x110
>     __clk_hw_register_mux+0x284/0x3a8
>     imx95_bc_probe+0x4f4/0xa70
> 
> Fixes: 5224b189462f ("clk: imx: add i.MX95 BLK CTL clk driver")
> Cc: stable@...r.kernel.org
> Reviewed-by: Frank Li <Frank.Li@....com>
> Signed-off-by: Xiaolei Wang <xiaolei.wang@...driver.com>

Reviewed-by: Peng Fan <peng.fan@....com>