Re: [regression] BUG: KASAN: use-after-free in lockdep_register_key+0x755/0x8f0

[Kalle Valo]

Dan Williams <dan.j.williams@xxxxxxxxx> writes:

> Kalle Valo wrote:
> [..]
>> >> The proposed fix for that is here:
>> >>
>> >> http://lore.kernel.org/r/66560aa9dbedb_195e294b0@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.notmuch
>> >
>> > I get "Not Found" from that link, is there a typo?
>> 
>> I found this fix from for-linus branch:
>> 
>> # PCI: Fix missing lockdep annotation for pci_cfg_access_trylock()for-linus
>> https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git/commit/?h=for-linus&id=f941b9182c54a885a9d5d4cfd97af66873c98560
>> 
>> But at least that doesn't fix my crash.
>
> Sorry for the broken link I mistakenly used a message-id from an
> internal thread with the intel.com reporter. However, it is moot now
> because the new direction is to revert the lockdep infrastructure:
>
> https://lore.kernel.org/r/171711745834.1628941.5259278474013108507.stgit@xxxxxxxxxxxxxxxxxxxxxxxxx
>
> (that link works...)

Thanks, that links works :) I did a quick test with the three patches
and I didn't see any crashes anymore. But to be confident I need to run
overnight tests, I'll provide my Tested-by after that.

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