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

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Message-ID: <175037992976.4372.2373294324696093637@lazor>
Date: Thu, 19 Jun 2025 17:38:49 -0700
From: Stephen Boyd <sboyd@...nel.org>
To: Frank.li@....com, Xiaolei Wang <xiaolei.wang@...driver.com>, abelvesa@...nel.org, festevam@...il.com, kernel@...gutronix.de, mturquette@...libre.com, peng.fan@....com, s.hauer@...gutronix.de, shawnguo@...nel.org
Cc: linux-clk@...r.kernel.org, imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] clk: imx: Fix an out-of-bounds access in dispmix_csr_clk_dev_data

Quoting Xiaolei Wang (2025-06-18 23:21:08)
> 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>
> ---

Applied to clk-fixes