[stable-4.19] mm/memory-failure: fix an incorrect use of tail pages

Commit Message

Liu Shixin March 7, 2024, 12:51 p.m. UTC

When backport commit c79c5a0a00a9 to 4.19-stable, there is a mistake change.
The head page instead of tail page should be passed to try_to_unmap(),
otherwise unmap will failed as follows.

 Memory failure: 0x121c10: failed to unmap page (mapcount=1)
 Memory failure: 0x121c10: recovery action for unmapping failed page: Ignored

Fixes: c6f50413f2aa ("mm/memory-failure: check the mapcount of the precise page")
Signed-off-by: Liu Shixin <[e-mail]>
---
 mm/memory-failure.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index c971d5e11f93..5fce5df0fe35 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1033,7 +1033,7 @@  static bool hwpoison_user_mappings(struct page *p, unsigned long pfn,
 	if (kill)
 		collect_procs(hpage, &tokill, flags & MF_ACTION_REQUIRED);
 
-	unmap_success = try_to_unmap(p, ttu);
+	unmap_success = try_to_unmap(hpage, ttu);
 	if (!unmap_success)
 		pr_err("Memory failure: %#lx: failed to unmap page (mapcount=%d)\n",
 		       pfn, page_mapcount(p));