[merged mm-stable] mm-swap-ratelimit-bad-swap-entry-reports.patch removed from -mm tree

The quilt patch titled
     Subject: mm, swap: ratelimit bad swap entry reports
has been removed from the -mm tree.  Its filename was
     mm-swap-ratelimit-bad-swap-entry-reports.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Breno Leitao <[email protected]>
Subject: mm, swap: ratelimit bad swap entry reports
Date: Tue, 18 Aug 2026 02:03:40 -0700

A corrupt page table hands the same bogus entry to get_swap_device() on
every access to the mapping, and every rejection is logged.  One machine
logged 6185620 copies of the same line in a few hours.

swap_dup_entry_direct() prints the same message from the fork path, once
per call: the WARN_ON_ONCE() guarding it warns once, the pr_err() inside
does not.

Rate limit all three prints.

Link: https://lore.kernel.org/[email protected]
Fixes: 23b230ba8ac3 ("mm/swap: print bad swap offset entry in get_swap_device")
Signed-off-by: Breno Leitao <[email protected]>
Reviewed-by: Barry Song <[email protected]>
Reviewed-by: Nhat Pham <[email protected]>
Acked-by: Kairui Song <[email protected]>
Acked-by: David Hildenbrand (Arm) <[email protected]>
Cc: Baoquan He <[email protected]>
Cc: Chris Li <[email protected]>
Cc: Kemeng Shi <[email protected]>
Cc: Miaohe Lin <[email protected]>
Cc: Oscar Salvador <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---

 mm/swapfile.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/mm/swapfile.c~mm-swap-ratelimit-bad-swap-entry-reports
+++ a/mm/swapfile.c
@@ -1899,11 +1899,11 @@ struct swap_info_struct *get_swap_device
 
 	return si;
 bad_nofile:
-	pr_err("%s: %s%08lx\n", __func__, Bad_file, entry.val);
+	pr_err_ratelimited("%s: %s%08lx\n", __func__, Bad_file, entry.val);
 out:
 	return NULL;
 put_out:
-	pr_err("%s: %s%08lx\n", __func__, Bad_offset, entry.val);
+	pr_err_ratelimited("%s: %s%08lx\n", __func__, Bad_offset, entry.val);
 	percpu_ref_put(&si->users);
 	return NULL;
 }
@@ -3883,7 +3883,7 @@ int swap_dup_entry_direct(swp_entry_t en
 
 	si = swap_entry_to_info(entry);
 	if (WARN_ON_ONCE(!si)) {
-		pr_err("%s%08lx\n", Bad_file, entry.val);
+		pr_err_ratelimited("%s%08lx\n", Bad_file, entry.val);
 		return -EINVAL;
 	}
 
_

Patches currently in -mm which might be from [email protected] are