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| author | Christian Brauner <brauner@kernel.org> | 2025-09-17 12:01:05 +0200 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2025-09-19 14:26:14 +0200 |
| commit | 7914f15c5e45ea6c76f2b3272ff39d8fe67b13f5 (patch) | |
| tree | 32385a82110d012928536d7787b024add8818f63 /mm/userfaultfd.c | |
| parent | 885fc8ac0a4dc70f5d87b80b0977292870e35c60 (diff) | |
| parent | 38f4885088fc5ad41b8b0a2a2cfc73d01e709e5c (diff) | |
Merge branch 'no-rebase-mnt_ns_tree_remove'
Bring in the fix for removing a mount namespace from the mount namespace
rbtree and list.
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'mm/userfaultfd.c')
| -rw-r--r-- | mm/userfaultfd.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/mm/userfaultfd.c b/mm/userfaultfd.c index cbed91b09640..45e6290e2e8b 100644 --- a/mm/userfaultfd.c +++ b/mm/userfaultfd.c @@ -1821,13 +1821,16 @@ ssize_t move_pages(struct userfaultfd_ctx *ctx, unsigned long dst_start, /* Check if we can move the pmd without splitting it. */ if (move_splits_huge_pmd(dst_addr, src_addr, src_start + len) || !pmd_none(dst_pmdval)) { - struct folio *folio = pmd_folio(*src_pmd); - - if (!folio || (!is_huge_zero_folio(folio) && - !PageAnonExclusive(&folio->page))) { - spin_unlock(ptl); - err = -EBUSY; - break; + /* Can be a migration entry */ + if (pmd_present(*src_pmd)) { + struct folio *folio = pmd_folio(*src_pmd); + + if (!is_huge_zero_folio(folio) && + !PageAnonExclusive(&folio->page)) { + spin_unlock(ptl); + err = -EBUSY; + break; + } } spin_unlock(ptl); |