linux-kernel - Re: clkdev: report over-sized strings when creating clkdev entries

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Message-Id: <11be44d3-0f32-49c6-b4ae-ba97a9f97763@app.fastmail.com>
Date: Tue, 07 May 2024 09:44:15 +0200
From: "Arnd Bergmann" <arnd@...db.de>
To: "Naresh Kamboju" <naresh.kamboju@...aro.org>,
 "open list" <linux-kernel@...r.kernel.org>,
 linux-clk <linux-clk@...r.kernel.org>,
 "Linux ARM" <linux-arm-kernel@...ts.infradead.org>,
 lkft-triage@...ts.linaro.org
Cc: "Russell King" <linux@...linux.org.uk>,
 "Anders Roxell" <anders.roxell@...aro.org>,
 "Dan Carpenter" <dan.carpenter@...aro.org>,
 "Michael Turquette" <mturquette@...libre.com>
Subject: Re: clkdev: report over-sized strings when creating clkdev entries

On Tue, May 7, 2024, at 09:20, Naresh Kamboju wrote:
> The WinLink E850-96 board boot failed with Linux next-20240506 but there
> is no kernel crash log on the serial [1].
>
> Anders bisection results pointing to this commit,
> # first bad commit:
>   [4d11c62ca8d77cb1f79054844b598e0f4e92dabe]
>   clkdev: report over-sized strings when creating clkdev entrie
>
> After reverting the above patch the boot test passed [2].
>
> Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
>
> Links:
> [1] - https://lkft.validation.linaro.org/scheduler/job/7546260
> [2] - https://lkft.validation.linaro.org/scheduler/job/7548064

I assume this is an actual overflow that was previously ignored
and is now causing vclkdev_alloc() to fail. Unfortunately this
happens before the console is up, so there is no output. Can
you run the broken version again with 'earlycon' added to the
boot arguments?

      Arnd