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

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Bjorn Helgaas <helgaas@xxxxxxxxxx> writes:

> On Sat, Jun 01, 2024 at 11:39:03AM +0300, Kalle Valo wrote:
>
>> Kalle Valo <kvalo@xxxxxxxxxx> writes:
>> 
>> > 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.
>> 
>> Ok, I'm now quite confident that the issues I saw are solved so:
>> 
>> Tested-by: Kalle Valo <kvalo@xxxxxxxxxx>
>
> Thanks for reporting the issue and testing the fix!  Can you please
> respond with your Tested-by to the actual patch(es) you tested?

Not easily as I'm not subscribed to linux-pci list and I haven't
researched how to import mbox files to my mailer :) So feel free to
ignore my Tested-by tag in this case.

-- 
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