29 files changed, 212 insertions, 69 deletions

diff --git a/.mailmap b/.mailmap
index 7efe43237ca8..f5f97f947020 100644
--- a/.mailmap
+++ b/.mailmap
@@ -435,7 +435,7 @@ Martin Kepplinger <martink@posteo.de> <martin.kepplinger@ginzinger.com>
 Martin Kepplinger <martink@posteo.de> <martin.kepplinger@puri.sm>
 Martin Kepplinger <martink@posteo.de> <martin.kepplinger@theobroma-systems.com>
 Martyna Szapar-Mudlaw <martyna.szapar-mudlaw@linux.intel.com> <martyna.szapar-mudlaw@intel.com>
-Mathieu Othacehe <m.othacehe@gmail.com> <othacehe@gnu.org>
+Mathieu Othacehe <othacehe@gnu.org> <m.othacehe@gmail.com>
 Mat Martineau <martineau@kernel.org> <mathew.j.martineau@linux.intel.com>
 Mat Martineau <martineau@kernel.org> <mathewm@codeaurora.org>
 Matthew Wilcox <willy@infradead.org> <matthew.r.wilcox@intel.com>
diff --git a/Documentation/admin-guide/mm/transhuge.rst b/Documentation/admin-guide/mm/transhuge.rst
index 5034915f4e8e..8872203df088 100644
--- a/Documentation/admin-guide/mm/transhuge.rst
+++ b/Documentation/admin-guide/mm/transhuge.rst
@@ -436,7 +436,7 @@ AnonHugePmdMapped).
 The number of file transparent huge pages mapped to userspace is available
 by reading ShmemPmdMapped and ShmemHugePages fields in ``/proc/meminfo``.
 To identify what applications are mapping file transparent huge pages, it
-is necessary to read ``/proc/PID/smaps`` and count the FileHugeMapped fields
+is necessary to read ``/proc/PID/smaps`` and count the FilePmdMapped fields
 for each mapping.
 
 Note that reading the smaps file is expensive and reading it
diff --git a/MAINTAINERS b/MAINTAINERS
index 85c8a68d11d8..30cbc3d44cd5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -14756,7 +14756,7 @@ F:	drivers/memory/mtk-smi.c
 F:	include/soc/mediatek/smi.h
 
 MEDIATEK SWITCH DRIVER
-M:	Arınç ÜNAL <arinc.unal@arinc9.com>
+M:	Chester A. Unal <chester.a.unal@arinc9.com>
 M:	Daniel Golle <daniel@makrotopia.org>
 M:	DENG Qingfang <dqfext@gmail.com>
 M:	Sean Wang <sean.wang@mediatek.com>
@@ -18460,7 +18460,7 @@ F:	Documentation/devicetree/bindings/pinctrl/mediatek,mt8183-pinctrl.yaml
 F:	drivers/pinctrl/mediatek/
 
 PIN CONTROLLER - MEDIATEK MIPS
-M:	Arınç ÜNAL <arinc.unal@arinc9.com>
+M:	Chester A. Unal <chester.a.unal@arinc9.com>
 M:	Sergio Paracuellos <sergio.paracuellos@gmail.com>
 L:	linux-mediatek@lists.infradead.org (moderated for non-subscribers)
 L:	linux-mips@vger.kernel.org
@@ -19504,7 +19504,7 @@ S:	Maintained
 F:	arch/mips/ralink
 
 RALINK MT7621 MIPS ARCHITECTURE
-M:	Arınç ÜNAL <arinc.unal@arinc9.com>
+M:	Chester A. Unal <chester.a.unal@arinc9.com>
 M:	Sergio Paracuellos <sergio.paracuellos@gmail.com>
 L:	linux-mips@vger.kernel.org
 S:	Maintained
diff --git a/fs/ocfs2/quota_global.c b/fs/ocfs2/quota_global.c
index 2b0daced98eb..3404e7a30c33 100644
--- a/fs/ocfs2/quota_global.c
+++ b/fs/ocfs2/quota_global.c
@@ -893,7 +893,7 @@ static int ocfs2_get_next_id(struct super_block *sb, struct kqid *qid)
 	int status = 0;
 
 	trace_ocfs2_get_next_id(from_kqid(&init_user_ns, *qid), type);
-	if (!sb_has_quota_loaded(sb, type)) {
+	if (!sb_has_quota_active(sb, type)) {
 		status = -ESRCH;
 		goto out;
 	}
diff --git a/fs/ocfs2/quota_local.c b/fs/ocfs2/quota_local.c
index 73d3367c533b..2956d888c131 100644
--- a/fs/ocfs2/quota_local.c
+++ b/fs/ocfs2/quota_local.c
@@ -867,6 +867,7 @@ out:
 	brelse(oinfo->dqi_libh);
 	brelse(oinfo->dqi_lqi_bh);
 	kfree(oinfo);
+	info->dqi_priv = NULL;
 	return status;
 }
 
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 38a5a3e9cba2..f02cd362309a 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -1810,7 +1810,7 @@ static int pagemap_pmd_range(pmd_t *pmdp, unsigned long addr, unsigned long end,
 		}
 
 		for (; addr != end; addr += PAGE_SIZE, idx++) {
-			unsigned long cur_flags = flags;
+			u64 cur_flags = flags;
 			pagemap_entry_t pme;
 
 			if (folio && (flags & PM_PRESENT) &&
diff --git a/include/linux/memfd.h b/include/linux/memfd.h
index 3f2cf339ceaf..d437e3070850 100644
--- a/include/linux/memfd.h
+++ b/include/linux/memfd.h
@@ -7,6 +7,7 @@
 #ifdef CONFIG_MEMFD_CREATE
 extern long memfd_fcntl(struct file *file, unsigned int cmd, unsigned int arg);
 struct folio *memfd_alloc_folio(struct file *memfd, pgoff_t idx);
+unsigned int *memfd_file_seals_ptr(struct file *file);
 #else
 static inline long memfd_fcntl(struct file *f, unsigned int c, unsigned int a)
 {
@@ -16,6 +17,19 @@ static inline struct folio *memfd_alloc_folio(struct file *memfd, pgoff_t idx)
 {
 	return ERR_PTR(-EINVAL);
 }
+
+static inline unsigned int *memfd_file_seals_ptr(struct file *file)
+{
+	return NULL;
+}
 #endif
 
+/* Retrieve memfd seals associated with the file, if any. */
+static inline unsigned int memfd_file_seals(struct file *file)
+{
+	unsigned int *sealsp = memfd_file_seals_ptr(file);
+
+	return sealsp ? *sealsp : 0;
+}
+
 #endif /* __LINUX_MEMFD_H */
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 338a76ce9083..b1c3db9cf355 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -3125,6 +3125,7 @@ static inline bool pagetable_pmd_ctor(struct ptdesc *ptdesc)
 	if (!pmd_ptlock_init(ptdesc))
 		return false;
 	__folio_set_pgtable(folio);
+	ptdesc_pmd_pts_init(ptdesc);
 	lruvec_stat_add_folio(folio, NR_PAGETABLE);
 	return true;
 }
@@ -4101,6 +4102,37 @@ void mem_dump_obj(void *object);
 static inline void mem_dump_obj(void *object) {}
 #endif
 
+static inline bool is_write_sealed(int seals)
+{
+	return seals & (F_SEAL_WRITE | F_SEAL_FUTURE_WRITE);
+}
+
+/**
+ * is_readonly_sealed - Checks whether write-sealed but mapped read-only,
+ *                      in which case writes should be disallowing moving
+ *                      forwards.
+ * @seals: the seals to check
+ * @vm_flags: the VMA flags to check
+ *
+ * Returns whether readonly sealed, in which case writess should be disallowed
+ * going forward.
+ */
+static inline bool is_readonly_sealed(int seals, vm_flags_t vm_flags)
+{
+	/*
+	 * Since an F_SEAL_[FUTURE_]WRITE sealed memfd can be mapped as
+	 * MAP_SHARED and read-only, take care to not allow mprotect to
+	 * revert protections on such mappings. Do this only for shared
+	 * mappings. For private mappings, don't need to mask
+	 * VM_MAYWRITE as we still want them to be COW-writable.
+	 */
+	if (is_write_sealed(seals) &&
+	    ((vm_flags & (VM_SHARED | VM_WRITE)) == VM_SHARED))
+		return true;
+
+	return false;
+}
+
 /**
  * seal_check_write - Check for F_SEAL_WRITE or F_SEAL_FUTURE_WRITE flags and
  *                    handle them.
@@ -4112,24 +4144,15 @@ static inline void mem_dump_obj(void *object) {}
  */
 static inline int seal_check_write(int seals, struct vm_area_struct *vma)
 {
-	if (seals & (F_SEAL_WRITE | F_SEAL_FUTURE_WRITE)) {
-		/*
-		 * New PROT_WRITE and MAP_SHARED mmaps are not allowed when
-		 * write seals are active.
-		 */
-		if ((vma->vm_flags & VM_SHARED) && (vma->vm_flags & VM_WRITE))
-			return -EPERM;
-
-		/*
-		 * Since an F_SEAL_[FUTURE_]WRITE sealed memfd can be mapped as
-		 * MAP_SHARED and read-only, take care to not allow mprotect to
-		 * revert protections on such mappings. Do this only for shared
-		 * mappings. For private mappings, don't need to mask
-		 * VM_MAYWRITE as we still want them to be COW-writable.
-		 */
-		if (vma->vm_flags & VM_SHARED)
-			vm_flags_clear(vma, VM_MAYWRITE);
-	}
+	if (!is_write_sealed(seals))
+		return 0;
+
+	/*
+	 * New PROT_WRITE and MAP_SHARED mmaps are not allowed when
+	 * write seals are active.
+	 */
+	if ((vma->vm_flags & VM_SHARED) && (vma->vm_flags & VM_WRITE))
+		return -EPERM;
 
 	return 0;
 }
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 7361a8f3ab68..332cee285662 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -445,6 +445,7 @@ FOLIO_MATCH(compound_head, _head_2a);
  * @pt_index:         Used for s390 gmap.
  * @pt_mm:            Used for x86 pgds.
  * @pt_frag_refcount: For fragmented page table tracking. Powerpc only.
+ * @pt_share_count:   Used for HugeTLB PMD page table share count.
  * @_pt_pad_2:        Padding to ensure proper alignment.
  * @ptl:              Lock for the page table.
  * @__page_type:      Same as page->page_type. Unused for page tables.
@@ -471,6 +472,9 @@ struct ptdesc {
 		pgoff_t pt_index;
 		struct mm_struct *pt_mm;
 		atomic_t pt_frag_refcount;
+#ifdef CONFIG_HUGETLB_PMD_PAGE_TABLE_SHARING
+		atomic_t pt_share_count;
+#endif
 	};
 
 	union {
@@ -516,6 +520,32 @@ static_assert(sizeof(struct ptdesc) <= sizeof(struct page));
 	const struct page *:		(const struct ptdesc *)(p),	\
 	struct page *:			(struct ptdesc *)(p)))
 
+#ifdef CONFIG_HUGETLB_PMD_PAGE_TABLE_SHARING
+static inline void ptdesc_pmd_pts_init(struct ptdesc *ptdesc)
+{
+	atomic_set(&ptdesc->pt_share_count, 0);
+}
+
+static inline void ptdesc_pmd_pts_inc(struct ptdesc *ptdesc)
+{
+	atomic_inc(&ptdesc->pt_share_count);
+}
+
+static inline void ptdesc_pmd_pts_dec(struct ptdesc *ptdesc)
+{
+	atomic_dec(&ptdesc->pt_share_count);
+}
+
+static inline int ptdesc_pmd_pts_count(struct ptdesc *ptdesc)
+{
+	return atomic_read(&ptdesc->pt_share_count);
+}
+#else
+static inline void ptdesc_pmd_pts_init(struct ptdesc *ptdesc)
+{
+}
+#endif
+
 /*
  * Used for sizing the vmemmap region on some architectures
  */
diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h
index 35842d1e3879..5b520fe86b60 100644
--- a/include/linux/percpu-defs.h
+++ b/include/linux/percpu-defs.h
@@ -221,10 +221,7 @@ do {									\
 } while (0)
 
 #define PERCPU_PTR(__p)							\
-({									\
-	unsigned long __pcpu_ptr = (__force unsigned long)(__p);	\
-	(typeof(*(__p)) __force __kernel *)(__pcpu_ptr);		\
-})
+	(typeof(*(__p)) __force __kernel *)((__force unsigned long)(__p))
 
 #ifdef CONFIG_SMP
 
diff --git a/kernel/kcov.c b/kernel/kcov.c
index 28a6be6e64fd..187ba1b80bda 100644
--- a/kernel/kcov.c
+++ b/kernel/kcov.c
@@ -166,7 +166,7 @@ static void kcov_remote_area_put(struct kcov_remote_area *area,
  * Unlike in_serving_softirq(), this function returns false when called during
  * a hardirq or an NMI that happened in the softirq context.
  */
-static inline bool in_softirq_really(void)
+static __always_inline bool in_softirq_really(void)
 {
 	return in_serving_softirq() && !in_hardirq() && !in_nmi();
 }
diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index d0ae808f3a14..047397136f15 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -4354,6 +4354,7 @@ int mas_alloc_cyclic(struct ma_state *mas, unsigned long *startp,
 		ret = 1;
 	}
 	if (ret < 0 && range_lo > min) {
+		mas_reset(mas);
 		ret = mas_empty_area(mas, min, range_hi, 1);
 		if (ret == 0)
 			ret = 1;
diff --git a/mm/damon/core.c b/mm/damon/core.c
index 8b8e2933dcd4..0776452a1abb 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -868,6 +868,11 @@ static int damon_commit_schemes(struct damon_ctx *dst, struct damon_ctx *src)
 				NUMA_NO_NODE);
 		if (!new_scheme)
 			return -ENOMEM;
+		err = damos_commit(new_scheme, src_scheme);
+		if (err) {
+			damon_destroy_scheme(new_scheme);
+			return err;
+		}
 		damon_add_scheme(dst, new_scheme);
 	}
 	return 0;
@@ -961,8 +966,11 @@ static int damon_commit_targets(
 			return -ENOMEM;
 		err = damon_commit_target(new_target, false,
 				src_target, damon_target_has_pid(src));
-		if (err)
+		if (err) {
+			damon_destroy_target(new_target);
 			return err;
+		}
+		damon_add_target(dst, new_target);
 	}
 	return 0;
 }
diff --git a/mm/filemap.c b/mm/filemap.c
index f61cf51c2238..33b60d448fca 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -124,15 +124,6 @@
  *    ->private_lock		(zap_pte_range->block_dirty_folio)
  */
 
-static void mapping_set_update(struct xa_state *xas,
-		struct address_space *mapping)
-{
-	if (dax_mapping(mapping) || shmem_mapping(mapping))
-		return;
-	xas_set_update(xas, workingset_update_node);
-	xas_set_lru(xas, &shadow_nodes);
-}
-
 static void page_cache_delete(struct address_space *mapping,
 				   struct folio *folio, void *shadow)
 {
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index cec4b121193f..c498874a7170 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -7211,7 +7211,7 @@ pte_t *huge_pmd_share(struct mm_struct *mm, struct vm_area_struct *vma,
 			spte = hugetlb_walk(svma, saddr,
 					    vma_mmu_pagesize(svma));
 			if (spte) {
-				get_page(virt_to_page(spte));
+				ptdesc_pmd_pts_inc(virt_to_ptdesc(spte));
 				break;
 			}
 		}
@@ -7226,7 +7226,7 @@ pte_t *huge_pmd_share(struct mm_struct *mm, struct vm_area_struct *vma,
 				(pmd_t *)((unsigned long)spte & PAGE_MASK));
 		mm_inc_nr_pmds(mm);
 	} else {
-		put_page(virt_to_page(spte));
+		ptdesc_pmd_pts_dec(virt_to_ptdesc(spte));
 	}
 	spin_unlock(&mm->page_table_lock);
 out:
@@ -7238,10 +7238,6 @@ out:
 /*
  * unmap huge page backed by shared pte.
  *
- * Hugetlb pte page is ref counted at the time of mapping.  If pte is shared
- * indicated by page_count > 1, unmap is achieved by clearing pud and
- * decrementing the ref count. If count == 1, the pte page is not shared.
- *
  * Called with page table lock held.
  *
  * returns: 1 successfully unmapped a shared pte page
@@ -7250,18 +7246,20 @@ out:
 int huge_pmd_unshare(struct mm_struct *mm, struct vm_area_struct *vma,
 					unsigned long addr, pte_t *ptep)
 {
+	unsigned long sz = huge_page_size(hstate_vma(vma));
 	pgd_t *pgd = pgd_offset(mm, addr);
 	p4d_t *p4d = p4d_offset(pgd, addr);
 	pud_t *pud = pud_offset(p4d, addr);
 
 	i_mmap_assert_write_locked(vma->vm_file->f_mapping);
 	hugetlb_vma_assert_locked(vma);
-	BUG_ON(page_count(virt_to_page(ptep)) == 0);
-	if (page_count(virt_to_page(ptep)) == 1)
+	if (sz != PMD_SIZE)
+		return 0;
+	if (!ptdesc_pmd_pts_count(virt_to_ptdesc(ptep)))
 		return 0;
 
 	pud_clear(pud);
-	put_page(virt_to_page(ptep));
+	ptdesc_pmd_pts_dec(virt_to_ptdesc(ptep));
 	mm_dec_nr_pmds(mm);
 	return 1;
 }
diff --git a/mm/internal.h b/mm/internal.h
index 3bd08bafad04..9826f7dce607 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -1504,6 +1504,12 @@ static inline void shrinker_debugfs_remove(struct dentry *debugfs_entry,
 /* Only track the nodes of mappings with shadow entries */
 void workingset_update_node(struct xa_node *node);
 extern struct list_lru shadow_nodes;
+#define mapping_set_update(xas, mapping) do {			\
+	if (!dax_mapping(mapping) && !shmem_mapping(mapping)) {	\
+		xas_set_update(xas, workingset_update_node);	\
+		xas_set_lru(xas, &shadow_nodes);		\
+	}							\
+} while (0)
 
 /* mremap.c */
 unsigned long move_page_tables(struct vm_area_struct *vma,
diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index 6f8d46d107b4..653dbb1ff05c 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -19,6 +19,7 @@
 #include <linux/rcupdate_wait.h>
 #include <linux/swapops.h>
 #include <linux/shmem_fs.h>
+#include <linux/dax.h>
 #include <linux/ksm.h>
 
 #include <asm/tlb.h>
@@ -1837,6 +1838,8 @@ static int collapse_file(struct mm_struct *mm, unsigned long addr,
 	if (result != SCAN_SUCCEED)
 		goto out;
 
+	mapping_set_update(&xas, mapping);
+
 	__folio_set_locked(new_folio);
 	if (is_shmem)
 		__folio_set_swapbacked(new_folio);
diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index 2a945c07ae99..737af23f4f4e 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -373,7 +373,7 @@ static void print_unreferenced(struct seq_file *seq,
 
 	for (i = 0; i < nr_entries; i++) {
 		void *ptr = (void *)entries[i];
-		warn_or_seq_printf(seq, "    [<%pK>] %pS\n", ptr, ptr);
+		warn_or_seq_printf(seq, "    %pS\n", ptr);
 	}
 }
 
diff --git a/mm/list_lru.c b/mm/list_lru.c
index f93ada6a207b..7d69434c70e0 100644
--- a/mm/list_lru.c
+++ b/mm/list_lru.c
@@ -77,7 +77,6 @@ again:
 			spin_lock(&l->lock);
 		nr_items = READ_ONCE(l->nr_items);
 		if (likely(nr_items != LONG_MIN)) {
-			WARN_ON(nr_items < 0);
 			rcu_read_unlock();
 			return l;
 		}
@@ -450,6 +449,7 @@ static void memcg_reparent_list_lru_one(struct list_lru *lru, int nid,
 
 	list_splice_init(&src->list, &dst->list);
 	if (src->nr_items) {
+		WARN_ON(src->nr_items < 0);
 		dst->nr_items += src->nr_items;
 		set_shrinker_bit(dst_memcg, nid, lru_shrinker_id(lru));
 	}
diff --git a/mm/memfd.c b/mm/memfd.c
index c17c3ea701a1..35a370d75c9a 100644
--- a/mm/memfd.c
+++ b/mm/memfd.c
@@ -170,7 +170,7 @@ static int memfd_wait_for_pins(struct address_space *mapping)
 	return error;
 }
 
-static unsigned int *memfd_file_seals_ptr(struct file *file)
+unsigned int *memfd_file_seals_ptr(struct file *file)
 {
 	if (shmem_file(file))
 		return &SHMEM_I(file_inode(file))->seals;
diff --git a/mm/mmap.c b/mm/mmap.c
index d32b7e701058..aec208f90337 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -47,6 +47,7 @@
 #include <linux/oom.h>
 #include <linux/sched/mm.h>
 #include <linux/ksm.h>
+#include <linux/memfd.h>
 
 #include <linux/uaccess.h>
 #include <asm/cacheflush.h>
@@ -368,6 +369,7 @@ unsigned long do_mmap(struct file *file, unsigned long addr,
 
 	if (file) {
 		struct inode *inode = file_inode(file);
+		unsigned int seals = memfd_file_seals(file);
 		unsigned long flags_mask;
 
 		if (!file_mmap_ok(file, inode, pgoff, len))
@@ -408,6 +410,8 @@ unsigned long do_mmap(struct file *file, unsigned long addr,
 			vm_flags |= VM_SHARED | VM_MAYSHARE;
 			if (!(file->f_mode & FMODE_WRITE))
 				vm_flags &= ~(VM_MAYWRITE | VM_SHARED);
+			else if (is_readonly_sealed(seals, vm_flags))
+				vm_flags &= ~VM_MAYWRITE;
 			fallthrough;
 		case MAP_PRIVATE:
 			if (!(file->f_mode & FMODE_READ))
@@ -888,7 +892,7 @@ __get_unmapped_area(struct file *file, unsigned long addr, unsigned long len,
 
 	if (get_area) {
 		addr = get_area(file, addr, len, pgoff, flags);
-	} else if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE)
+	} else if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE) && !file
 		   && !addr /* no hint */
 		   && IS_ALIGNED(len, PMD_SIZE)) {
 		/* Ensures that larger anonymous mappings are THP aligned. */
diff --git a/mm/readahead.c b/mm/readahead.c
index ea650b8b02fb..e151f4b13ca4 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -646,7 +646,11 @@ void page_cache_async_ra(struct readahead_control *ractl,
 			1UL << order);
 	if (index == expected) {
 		ra->start += ra->size;
-		ra->size = get_next_ra_size(ra, max_pages);
+		/*
+		 * In the case of MADV_HUGEPAGE, the actual size might exceed
+		 * the readahead window.
+		 */
+		ra->size = max(ra->size, get_next_ra_size(ra, max_pages));
 		ra->async_size = ra->size;
 		goto readit;
 	}
diff --git a/mm/shmem.c b/mm/shmem.c
index f6fb053ac50d..ac58d4fb2e6f 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1535,7 +1535,7 @@ try_split:
 			    !shmem_falloc->waitq &&
 			    index >= shmem_falloc->start &&
 			    index < shmem_falloc->next)
-				shmem_falloc->nr_unswapped++;
+				shmem_falloc->nr_unswapped += nr_pages;
 			else
 				shmem_falloc = NULL;
 			spin_unlock(&inode->i_lock);
@@ -1689,6 +1689,7 @@ unsigned long shmem_allowable_huge_orders(struct inode *inode,
 	unsigned long mask = READ_ONCE(huge_shmem_orders_always);
 	unsigned long within_size_orders = READ_ONCE(huge_shmem_orders_within_size);
 	unsigned long vm_flags = vma ? vma->vm_flags : 0;
+	pgoff_t aligned_index;
 	bool global_huge;
 	loff_t i_size;
 	int order;
@@ -1723,9 +1724,9 @@ unsigned long shmem_allowable_huge_orders(struct inode *inode,
 	/* Allow mTHP that will be fully within i_size. */
 	order = highest_order(within_size_orders);
 	while (within_size_orders) {
-		index = round_up(index + 1, order);
+		aligned_index = round_up(index + 1, 1 << order);
 		i_size = round_up(i_size_read(inode), PAGE_SIZE);
-		if (i_size >> PAGE_SHIFT >= index) {
+		if (i_size >> PAGE_SHIFT >= aligned_index) {
 			mask |= within_size_orders;
 			break;
 		}
diff --git a/mm/util.c b/mm/util.c
index c1c3b06ab4f9..60aa40f612b8 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -297,12 +297,7 @@ void *memdup_user_nul(const void __user *src, size_t len)
 {
 	char *p;
 
-	/*
-	 * Always use GFP_KERNEL, since copy_from_user() can sleep and
-	 * cause pagefault, which makes it pointless to use GFP_NOFS
-	 * or GFP_ATOMIC.
-	 */
-	p = kmalloc_track_caller(len + 1, GFP_KERNEL);
+	p = kmem_buckets_alloc_track_caller(user_buckets, len + 1, GFP_USER | __GFP_NOWARN);
 	if (!p)
 		return ERR_PTR(-ENOMEM);
 
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 76378bc257e3..9a859b7d18d7 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -374,7 +374,14 @@ unsigned long zone_reclaimable_pages(struct zone *zone)
 	if (can_reclaim_anon_pages(NULL, zone_to_nid(zone), NULL))
 		nr += zone_page_state_snapshot(zone, NR_ZONE_INACTIVE_ANON) +
 			zone_page_state_snapshot(zone, NR_ZONE_ACTIVE_ANON);
-
+	/*
+	 * If there are no reclaimable file-backed or anonymous pages,
+	 * ensure zones with sufficient free pages are not skipped.
+	 * This prevents zones like DMA32 from being ignored in reclaim
+	 * scenarios where they can still help alleviate memory pressure.
+	 */
+	if (nr == 0)
+		nr = zone_page_state_snapshot(zone, NR_FREE_PAGES);
 	return nr;
 }
 
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 4d016314a56c..0889b75cef14 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -2148,13 +2148,14 @@ static int vmstat_cpu_online(unsigned int cpu)
 	if (!node_state(cpu_to_node(cpu), N_CPU)) {
 		node_set_state(cpu_to_node(cpu), N_CPU);
 	}
+	enable_delayed_work(&per_cpu(vmstat_work, cpu));
 
 	return 0;
 }
 
 static int vmstat_cpu_down_prep(unsigned int cpu)
 {
-	cancel_delayed_work_sync(&per_cpu(vmstat_work, cpu));
+	disable_delayed_work_sync(&per_cpu(vmstat_work, cpu));
 	return 0;
 }
 
diff --git a/mm/zswap.c b/mm/zswap.c
index f6316b66fb23..5a27af8d86ea 100644
--- a/mm/zswap.c
+++ b/mm/zswap.c
@@ -880,6 +880,18 @@ static int zswap_cpu_comp_dead(unsigned int cpu, struct hlist_node *node)
 	return 0;
 }
 
+/* Prevent CPU hotplug from freeing up the per-CPU acomp_ctx resources */
+static struct crypto_acomp_ctx *acomp_ctx_get_cpu(struct crypto_acomp_ctx __percpu *acomp_ctx)
+{
+	cpus_read_lock();
+	return raw_cpu_ptr(acomp_ctx);
+}
+
+static void acomp_ctx_put_cpu(void)
+{
+	cpus_read_unlock();
+}
+
 static bool zswap_compress(struct page *page, struct zswap_entry *entry,
 			   struct zswap_pool *pool)
 {
@@ -893,8 +905,7 @@ static bool zswap_compress(struct page *page, struct zswap_entry *entry,
 	gfp_t gfp;
 	u8 *dst;
 
-	acomp_ctx = raw_cpu_ptr(pool->acomp_ctx);
-
+	acomp_ctx = acomp_ctx_get_cpu(pool->acomp_ctx);
 	mutex_lock(&acomp_ctx->mutex);
 
 	dst = acomp_ctx->buffer;
@@ -950,6 +961,7 @@ unlock:
 		zswap_reject_alloc_fail++;
 
 	mutex_unlock(&acomp_ctx->mutex);
+	acomp_ctx_put_cpu();
 	return comp_ret == 0 && alloc_ret == 0;
 }
 
@@ -960,7 +972,7 @@ static void zswap_decompress(struct zswap_entry *entry, struct folio *folio)
 	struct crypto_acomp_ctx *acomp_ctx;
 	u8 *src;
 
-	acomp_ctx = raw_cpu_ptr(entry->pool->acomp_ctx);
+	acomp_ctx = acomp_ctx_get_cpu(entry->pool->acomp_ctx);
 	mutex_lock(&acomp_ctx->mutex);
 
 	src = zpool_map_handle(zpool, entry->handle, ZPOOL_MM_RO);
@@ -990,6 +1002,7 @@ static void zswap_decompress(struct zswap_entry *entry, struct folio *folio)
 
 	if (src != acomp_ctx->buffer)
 		zpool_unmap_handle(zpool, entry->handle);
+	acomp_ctx_put_cpu();
 }
 
 /*********************************
diff --git a/scripts/sorttable.h b/scripts/sorttable.h
index 7bd0184380d3..a7c5445baf00 100644
--- a/scripts/sorttable.h
+++ b/scripts/sorttable.h
@@ -110,7 +110,7 @@ static inline unsigned long orc_ip(const int *ip)
 
 static int orc_sort_cmp(const void *_a, const void *_b)
 {
-	struct orc_entry *orc_a;
+	struct orc_entry *orc_a, *orc_b;
 	const int *a = g_orc_ip_table + *(int *)_a;
 	const int *b = g_orc_ip_table + *(int *)_b;
 	unsigned long a_val = orc_ip(a);
@@ -128,6 +128,9 @@ static int orc_sort_cmp(const void *_a, const void *_b)
 	 * whitelisted .o files which didn't get objtool generation.
 	 */
 	orc_a = g_orc_table + (a - g_orc_ip_table);
+	orc_b = g_orc_table + (b - g_orc_ip_table);
+	if (orc_a->type == ORC_TYPE_UNDEFINED && orc_b->type == ORC_TYPE_UNDEFINED)
+		return 0;
 	return orc_a->type == ORC_TYPE_UNDEFINED ? -1 : 1;
 }
 
diff --git a/tools/testing/selftests/memfd/memfd_test.c b/tools/testing/selftests/memfd/memfd_test.c
index 0a0b55516028..c0c53451a16d 100644
--- a/tools/testing/selftests/memfd/memfd_test.c
+++ b/tools/testing/selftests/memfd/memfd_test.c
@@ -282,6 +282,24 @@ static void *mfd_assert_mmap_shared(int fd)
 	return p;
 }
 
+static void *mfd_assert_mmap_read_shared(int fd)
+{
+	void *p;
+
+	p = mmap(NULL,
+		 mfd_def_size,
+		 PROT_READ,
+		 MAP_SHARED,
+		 fd,
+		 0);
+	if (p == MAP_FAILED) {
+		printf("mmap() failed: %m\n");
+		abort();
+	}
+
+	return p;
+}
+
 static void *mfd_assert_mmap_private(int fd)
 {
 	void *p;
@@ -980,6 +998,30 @@ static void test_seal_future_write(void)
 	close(fd);
 }
 
+static void test_seal_write_map_read_shared(void)
+{
+	int fd;
+	void *p;
+
+	printf("%s SEAL-WRITE-MAP-READ\n", memfd_str);
+
+	fd = mfd_assert_new("kern_memfd_seal_write_map_read",
+			    mfd_def_size,
+			    MFD_CLOEXEC | MFD_ALLOW_SEALING);
+
+	mfd_assert_add_seals(fd, F_SEAL_WRITE);
+	mfd_assert_has_seals(fd, F_SEAL_WRITE);
+
+	p = mfd_assert_mmap_read_shared(fd);
+
+	mfd_assert_read(fd);
+	mfd_assert_read_shared(fd);
+	mfd_fail_write(fd);
+
+	munmap(p, mfd_def_size);
+	close(fd);
+}
+
 /*
  * Test SEAL_SHRINK
  * Test whether SEAL_SHRINK actually prevents shrinking
@@ -1593,6 +1635,7 @@ int main(int argc, char **argv)
 
 	test_seal_write();
 	test_seal_future_write();
+	test_seal_write_map_read_shared();
 	test_seal_shrink();
 	test_seal_grow();
 	test_seal_resize();