Re: [linux-next:master] [mm] bbcbf2a3f0: kernel_BUG_at_mm/memory.c

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On 21.12.23 12:23, Oliver Sang wrote:
hi, Andrew Morton,

On Wed, Dec 20, 2023 at 02:11:35PM -0800, Andrew Morton wrote:
On Tue, 19 Dec 2023 23:46:50 +0800 kernel test robot <oliver.sang@xxxxxxxxx> wrote:



Hello,

kernel test robot noticed "kernel_BUG_at_mm/memory.c" on:

commit: bbcbf2a3f05f74f9d268eab57abbdce6a65a94ad ("mm: convert ksm_might_need_to_copy() to work on folios")

I assume this is a bisection result, so it's quite repeatable?

yes, we bisect to this commit, it's quite repeatable:

ddd06bb63d9793ce bbcbf2a3f05f74f9d268eab57ab
---------------- ---------------------------
        fail:runs  %reproduction    fail:runs
            |             |             |
            :6          100%           6:6     dmesg.Kernel_panic-not_syncing:Fatal_exception
            :6          100%           6:6     dmesg.RIP:do_swap_page
            :6          100%           6:6     dmesg.invalid_opcode:#[##]
            :6          100%           6:6     dmesg.kernel_BUG_at_mm/memory.c



Can you try with the snipped I sent? Please let me know if you need a full patch for testing purposes.

--
Cheers,

David / dhildenb





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