Re: 6.6.8 stable: crash in folio_mark_dirty

[Genes Lists <lists@xxxxxxxxxxxx>]

On Sun, 2023-12-31 at 20:59 +0000, Matthew Wilcox wrote:

On Sat, Dec 30, 2023 at 10:23:26AM -0500, Genes Lists wrote:

Apologies in advance, but I cannot git bisect this since machine was

running for 10 days on 6.6.8 before this happened.

This problem simply doesn't make sense.  There's just no way we shoud be

able to get a not-uptodate folio into the page tables.  We do have one

pending patch which fixes a situation in which we can get some very

odd-looking situations due to reusing a page which has been freed.

I appreciate your ability to reproduce this is likely nil, but if you

could add

https://lore.kernel.org/all/20231220214715.912B4C433CA@xxxxxxxxxxxxxxx/

to your kernel, it might make things more stable for you.

Ok looks like that's in mainline - machine is now running 6.7.0-rc7 - unless you prefer I patch 6.6.8 with above and change to that.

thanks and sorry about bringing up wacky problem.

gene

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