linux-kernel - Re: [PATCH 04/11] regmap: kunit: Run sparse cache tests at non-zero register addresses

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Date: Fri, 17 May 2024 08:19:52 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: Mark Brown <broonie@...nel.org>
Cc: Richard Fitzgerald <rf@...nsource.cirrus.com>,
 linux-kernel@...r.kernel.org, patches@...nsource.cirrus.com
Subject: Re: [PATCH 04/11] regmap: kunit: Run sparse cache tests at non-zero
 register addresses

On 5/17/24 04:28, Mark Brown wrote:
> On Thu, May 16, 2024 at 12:53:34PM -0700, Guenter Roeck wrote:
> 
>>
>> With this patch in mainline, I get lots of errors such as
>>
>> [   23.494308] =============================================================================
>> [   23.496391] BUG kmalloc-64 (Tainted: G                 N): kmalloc Redzone overwritten
>>
>> Bisect log and first of many backtraces attached for reference.
> 
> What's your kernel architecture and config for this - it looks like
> there's some sanitiser enabled?

I have CONFIG_SLUB_DEBUG and CONFIG_SLUB_DEBUG_ON enabled. I also have
various other debug options enabled, but slub debugging should be the
relevant one. I see the problem with several architectures.

- arm (all variants)
- arm64 (little and big endian)
- loongarch
- mips (all variants)
- nios2
- ppc (all variants)
- riscv (32 and 64 bit)
- x86 (32 and 64 bit)

Guenter