From 9b071576f891ee5be970df75499d9d5892815f8a Mon Sep 17 00:00:00 2001 From: David Hildenbrand Date: Tue, 17 Dec 2024 20:50:00 +0100 Subject: fs/proc/task_mmu: fix pagemap flags with PMD THP entries on 32bit commit 3754137d263f52f4b507cf9ae913f8f0497d1b0e upstream. Entries (including flags) are u64, even on 32bit. So right now we are cutting of the flags on 32bit. This way, for example the cow selftest complains about: # ./cow ... Bail Out! read and ioctl return unmatched results for populated: 0 1 Link: https://lkml.kernel.org/r/20241217195000.1734039-1-david@redhat.com Fixes: 2c1f057e5be6 ("fs/proc/task_mmu: properly detect PM_MMAP_EXCLUSIVE per page of PMD-mapped THPs") Signed-off-by: David Hildenbrand Cc: Oscar Salvador Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- fs/proc/task_mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 59571737e167..b8640f36ebf8 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -1516,7 +1516,7 @@ static int pagemap_pmd_range(pmd_t *pmdp, unsigned long addr, unsigned long end, flags |= PM_FILE; for (; addr != end; addr += PAGE_SIZE, idx++) { - unsigned long cur_flags = flags; + u64 cur_flags = flags; pagemap_entry_t pme; if (page && (flags & PM_PRESENT) && -- cgit v1.2.3