Re: [linux-next:master] [slub] b82c7add4c: WARNING:at_mm/slub.c:#slab_free_after_rcu_debug

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Hi!

On Wed, Aug 7, 2024 at 10:42 AM kernel test robot <oliver.sang@xxxxxxxxx> wrote:
> hi, Jann Horn,
>
> as you educated me last time, I know this b82c7add4c is v5:)
> the CONFIG_SLUB_RCU_DEBUG is really enabled, and we saw lots of WARNING in dmesg
> https://download.01.org/0day-ci/archive/20240807/202408071606.258f19a0-oliver.sang@xxxxxxxxx/dmesg.xz
>
> not sure if it's expected? below report (parsed one of WARNING) just FYI.

Thanks a lot, and sorry that my series is creating so much work for you...

Okay, all these warnings at mm/slub.c:4550 are for the "if
(WARN_ON(is_kfence_address(rcu_head)))" check, which was wrong up to
v5 and fixed in v6. syzbot had also encountered that bug...

Thanks for letting me know, and have a nice day!





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