1 files changed, 4 insertions, 0 deletions

diff --git a/mm/swapfile.c b/mm/swapfile.c
index c7a33717d079..a134d1e86795 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -2961,6 +2961,10 @@ static unsigned long read_swap_header(struct swap_info_struct *p,
         maxpages = swp_offset(pte_to_swp_entry(
                         swp_entry_to_pte(swp_entry(0, ~0UL)))) + 1;
         last_page = swap_header->info.last_page;
+        if (!last_page) {
+                pr_warn("Empty swap-file\n");
+                return 0;
+        }
         if (last_page > maxpages) {
                 pr_warn("Truncating oversized swap area, only using %luk out of %luk\n",
                         maxpages << (PAGE_SHIFT - 10),