Re: [PATCH 6.12.y] mm: khugepaged: fix call hpage_collapse_scan_file() for anonymous vma

[Sasha Levin <sashal@kernel.org>]

[ Sasha's backport helper bot ]

Hi,

✅ All tests passed successfully. No issues detected.
No action required from the submitter.

The upstream commit SHA1 provided is correct: f1897f2f08b28ae59476d8b73374b08f856973af

WARNING: Author mismatch between patch and upstream commit:
Backport author: Jakub Acs <acsjakub@amazon.de>
Commit author: Liu Shixin <liushixin2@huawei.com>

Status in newer kernel trees:
6.15.y | Present (exact SHA1)

Note: The patch differs from the upstream commit:
---
1:  f1897f2f08b2 ! 1:  9575e41a87ec mm: khugepaged: fix call hpage_collapse_scan_file() for anonymous vma
    @@ Metadata
      ## Commit message ##
         mm: khugepaged: fix call hpage_collapse_scan_file() for anonymous vma
     
    +    commit f1897f2f08b28ae59476d8b73374b08f856973af upstream.
    +
         syzkaller reported such a BUG_ON():
     
          ------------[ cut here ]------------
    @@ Commit message
         Cc: Nanyong Sun <sunnanyong@huawei.com>
         Cc: Qi Zheng <zhengqi.arch@bytedance.com>
         Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    +    [acsjakub: backport, clean apply]
    +    Cc: Jakub Acs <acsjakub@amazon.de>
    +    Cc: linux-mm@kvack.org
     
      ## mm/khugepaged.c ##
     @@ mm/khugepaged.c: static unsigned int khugepaged_scan_mm_slot(unsigned int pages, int *result,

---

Results of testing on various branches:

| Branch                    | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| origin/linux-6.12.y       | Success     | Success    |