On Tue, Jul 04, 2023 at 02:13:03PM +0530, Harshit Mogalapalli wrote:

Hi Greg,

On 04/07/23 1:54 pm, Greg Kroah-Hartman wrote:

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While running LTP hugetlb testing on x86 the following kernel BUG noticed on running stable-rc 6.3.12-rc1.

Reported-by: Linux Kernel Functional Testing lkft@linaro.org

Crash log:

[ 54.386939] hugefallocate01 (410): drop_caches: 3 g tests.......

And this worked on 6.3.11 just fine?

Trying to narrow down what would have caused this...

Any chance you can run Linus's tree with thie LTP test as well?

Ah, I can hit this here locally too! Let me bisect...

Have you looked at Patch 9 of this series:

https://lore.kernel.org/stable/2023070416-wow-phrasing-b92c@gregkh/T/#m12068...

Looks very much related, it also has a note on Backporting. As I think it could be related, I am sharing this.(But haven't tested anything)

Yes, that's the offending patch. I should have read over the full changelogs before doing bisection, but bisection/test proved that this was not correct for 6.3.y at this point in time.

thanks,

greg k-h