From: Sam James <sam@xxxxxxxxxx> This reverts commit cec11fa2eb512ebe3a459c185f4aca1d44059bbf which is commit 35e351780fa9d8240dd6f7e4f245f9ea37e96c19 upstream. The backport is incomplete and causes xfstests failures. The consequences of the incomplete backport seem worse than the original issue, so pick the lesser evil and revert until a full backport is ready. Link: https://lore.kernel.org/stable/20240604004751.3883227-1-leah.rumancik@xxxxxxxxx/ Reported-by: Leah Rumancik <leah.rumancik@xxxxxxxxx> Signed-off-by: Sam James <sam@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- kernel/fork.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) --- a/kernel/fork.c +++ b/kernel/fork.c @@ -727,15 +727,6 @@ static __latent_entropy int dup_mmap(str } else if (anon_vma_fork(tmp, mpnt)) goto fail_nomem_anon_vma_fork; vm_flags_clear(tmp, VM_LOCKED_MASK); - /* - * Copy/update hugetlb private vma information. - */ - if (is_vm_hugetlb_page(tmp)) - hugetlb_dup_vma_private(tmp); - - if (tmp->vm_ops && tmp->vm_ops->open) - tmp->vm_ops->open(tmp); - file = tmp->vm_file; if (file) { struct address_space *mapping = file->f_mapping; @@ -752,6 +743,12 @@ static __latent_entropy int dup_mmap(str i_mmap_unlock_write(mapping); } + /* + * Copy/update hugetlb private vma information. + */ + if (is_vm_hugetlb_page(tmp)) + hugetlb_dup_vma_private(tmp); + /* Link the vma into the MT */ if (vma_iter_bulk_store(&vmi, tmp)) goto fail_nomem_vmi_store; @@ -760,6 +757,9 @@ static __latent_entropy int dup_mmap(str if (!(tmp->vm_flags & VM_WIPEONFORK)) retval = copy_page_range(tmp, mpnt); + if (tmp->vm_ops && tmp->vm_ops->open) + tmp->vm_ops->open(tmp); + if (retval) goto loop_out; } Patches currently in stable-queue which might be from sam@xxxxxxxxxx are queue-6.6/revert-fork-defer-linking-file-vma-until-vma-is-fully-initialized.patch
