Merge tag 'mm-hotfixes-stable-2026-02-04-15-55' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull misc fixes from Andrew Morton:
 "Five hotfixes.  Two are cc:stable, two are for MM.

  All are singletons - please see the changelogs for details"

* tag 'mm-hotfixes-stable-2026-02-04-15-55' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  Documentation: document liveupdate cmdline parameter
  mm, shmem: prevent infinite loop on truncate race
  mailmap: update Alexander Mikhalitsyn's emails
  liveupdate: luo_file: do not clear serialized_data on unfreeze
  x86/kfence: fix booting on 32bit non-PAE systems

1 files changed, 14 insertions, 9 deletions

diff --git a/mm/shmem.c b/mm/shmem.c
index 6c3485d24d66..79af5f9f8b90 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1211,17 +1211,22 @@ whole_folios:
 				swaps_freed = shmem_free_swap(mapping, indices[i],
 							      end - 1, folio);
 				if (!swaps_freed) {
-					/*
-					 * If found a large swap entry cross the end border,
-					 * skip it as the truncate_inode_partial_folio above
-					 * should have at least zerod its content once.
-					 */
+					pgoff_t base = indices[i];
+
 					order = shmem_confirm_swap(mapping, indices[i],
 								   radix_to_swp_entry(folio));
-					if (order > 0 && indices[i] + (1 << order) > end)
-						continue;
-					/* Swap was replaced by page: retry */
-					index = indices[i];
+					/*
+					 * If found a large swap entry cross the end or start
+					 * border, skip it as the truncate_inode_partial_folio
+					 * above should have at least zerod its content once.
+					 */
+					if (order > 0) {
+						base = round_down(base, 1 << order);
+						if (base < start || base + (1 << order) > end)
+							continue;
+					}
+					/* Swap was replaced by page or extended, retry */
+					index = base;
 					break;
 				}
 				nr_swaps_freed += swaps_freed;