Re: [PATCH v2 4/4] mm: Don't skip arch_sync_kernel_mappings() in error paths

On Mon, Feb 17, 2025 at 02:04:17PM +0000, Ryan Roberts wrote:

Fix callers that previously skipped calling arch_sync_kernel_mappings() if an error occurred during a pgtable update. The call is still required to sync any pgtable updates that may have occurred prior to hitting the error condition.

These are theoretical bugs discovered during code review.

Cc: stable@vger.kernel.org Fixes: 2ba3e6947aed ("mm/vmalloc: track which page-table levels were modified") Fixes: 0c95cba49255 ("mm: apply_to_pte_range warn and fail if a large pte is encountered") Reviewed-by: Anshuman Khandual anshuman.khandual@arm.com Signed-off-by: Ryan Roberts ryan.roberts@arm.com

Reviewed-by: Catalin Marinas catalin.marinas@arm.com