13 hotfixes. 9 are for MM. 9 are cc:stable and the remaining 4 address

post-7.1 issues or aren't considered suitable for backporting.
 
 All patches are singletons - please see the individual changelogs for
 details.
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Merge tag 'mm-hotfixes-stable-2026-05-25-16-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull misc fixes from Andrew Morton:
 "13 hotfixes. 9 are for MM. 9 are cc:stable and the remaining 4 address
  post-7.1 issues or aren't considered suitable for backporting.

  All patches are singletons - please see the individual changelogs for
  details"

* tag 'mm-hotfixes-stable-2026-05-25-16-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  Revert "mm: introduce a new page type for page pool in page type"
  mm/vmalloc: do not trigger BUG() on BH disabled context
  MAINTAINERS, mailmap: change email for Eugen Hristev
  mm/migrate_device: fix pgtable leak in migrate_vma_insert_huge_pmd_page
  kernel/fork: validate exit_signal in kernel_clone()
  mm: memcontrol: propagate NMI slab stats to memcg vmstats
  mm/damon/sysfs-schemes: delete tried region in regions_rmdirs()
  mm/rmap: initialize nr_pages to 1 at loop start in try_to_unmap_one
  zram: fix use-after-free in zram_writeback_endio
  memfd: deny writeable mappings when implying SEAL_WRITE
  ipc: limit next_id allocation to the valid ID range
  Revert "mm/hugetlbfs: update hugetlbfs to use mmap_prepare"
  MAINTAINERS: .mailmap: update after GEHC spin-off

.mailmap

@@ -263,8 +263,9 @@ Enric Balletbo i Serra <eballetbo@kernel.org> <enric.balletbo@collabora.com>
 Enric Balletbo i Serra <eballetbo@kernel.org> <eballetbo@iseebcn.com>
 Erik Kaneda <erik.kaneda@intel.com> <erik.schmauss@intel.com>
 Ethan Carter Edwards <ethan@ethancedwards.com> Ethan Edwards <ethancarteredwards@gmail.com>
-Eugen Hristev <eugen.hristev@linaro.org> <eugen.hristev@microchip.com>
+Eugen Hristev <ehristev@kernel.org> <eugen.hristev@microchip.com>
-Eugen Hristev <eugen.hristev@linaro.org> <eugen.hristev@collabora.com>
+Eugen Hristev <ehristev@kernel.org> <eugen.hristev@linaro.org>
+Eugen Hristev <ehristev@kernel.org> <eugen.hristev@collabora.com>
 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
 Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> <ezequiel@collabora.com>
 Faith Ekstrand <faith.ekstrand@collabora.com> <jason@jlekstrand.net>
@@ -339,6 +340,7 @@ Henrik Rydberg <rydberg@bitmath.org>
 Herbert Xu <herbert@gondor.apana.org.au>
 Huacai Chen <chenhuacai@kernel.org> <chenhc@lemote.com>
 Huacai Chen <chenhuacai@kernel.org> <chenhuacai@loongson.cn>
+Ian Ray <ian.ray@gehealthcare.com> <ian.ray@ge.com>
 Ignat Korchagin <ignat@linux.win> <ignat@cloudflare.com>
 Igor Korotin <igor.korotin@linux.dev> <igor.korotin.linux@gmail.com>
 Ike Panhc <ikepanhc@gmail.com> <ike.pan@canonical.com>

MAINTAINERS

@@ -10835,7 +10835,7 @@ F:	include/linux/generic-radix-tree.h
 F:	lib/generic-radix-tree.c
 
 GENERIC RESISTIVE TOUCHSCREEN ADC DRIVER
-M:	Eugen Hristev <eugen.hristev@microchip.com>
+M:	Eugen Hristev <ehristev@kernel.org>
 L:	linux-input@vger.kernel.org
 S:	Maintained
 F:	drivers/input/touchscreen/resistive-adc-touch.c
@@ -16506,7 +16506,7 @@ F:	drivers/usb/mtu3/
 
 MEGACHIPS STDPXXXX-GE-B850V3-FW LVDS/DP++ BRIDGES
 M:	Peter Senna Tschudin <peter.senna@gmail.com>
-M:	Ian Ray <ian.ray@ge.com>
+M:	Ian Ray <ian.ray@gehealthcare.com>
 M:	Martyn Welch <martyn.welch@collabora.co.uk>
 S:	Maintained
 F:	Documentation/devicetree/bindings/display/bridge/megachips-stdpxxxx-ge-b850v3-fw.txt
@@ -17345,7 +17345,7 @@ F:	Documentation/devicetree/bindings/sound/mikroe,mikroe-proto.txt
 F:	sound/soc/atmel
 
 MICROCHIP CSI2DC DRIVER
-M:	Eugen Hristev <eugen.hristev@microchip.com>
+M:	Eugen Hristev <ehristev@kernel.org>
 L:	linux-media@vger.kernel.org
 S:	Supported
 F:	Documentation/devicetree/bindings/media/microchip,csi2dc.yaml
@@ -17372,7 +17372,7 @@ F:	drivers/i2c/busses/i2c-at91-*.c
 F:	drivers/i2c/busses/i2c-at91.h
 
 MICROCHIP ISC DRIVER
-M:	Eugen Hristev <eugen.hristev@microchip.com>
+M:	Eugen Hristev <ehristev@kernel.org>
 L:	linux-media@vger.kernel.org
 S:	Supported
 F:	Documentation/devicetree/bindings/media/atmel,isc.yaml
@@ -17384,7 +17384,7 @@ F:	drivers/staging/media/deprecated/atmel/atmel-sama*-isc*
 F:	include/linux/atmel-isc-media.h
 
 MICROCHIP ISI DRIVER
-M:	Eugen Hristev <eugen.hristev@microchip.com>
+M:	Eugen Hristev <ehristev@kernel.org>
 L:	linux-media@vger.kernel.org
 S:	Supported
 F:	drivers/media/platform/atmel/atmel-isi.c
@@ -17574,7 +17574,7 @@ F:	Documentation/devicetree/bindings/display/bridge/microchip,sam9x75-lvds.yaml
 F:	drivers/gpu/drm/bridge/microchip-lvds.c
 
 MICROCHIP SAMA5D2-COMPATIBLE ADC DRIVER
-M:	Eugen Hristev <eugen.hristev@microchip.com>
+M:	Eugen Hristev <ehristev@kernel.org>
 L:	linux-iio@vger.kernel.org
 S:	Supported
 F:	Documentation/devicetree/bindings/iio/adc/atmel,sama5d2-adc.yaml
@@ -24124,7 +24124,7 @@ F:	drivers/mmc/host/sdhci*
 
 SECURE DIGITAL HOST CONTROLLER INTERFACE (SDHCI) MICROCHIP DRIVER
 M:	Aubin Constans <aubin.constans@microchip.com>
-R:	Eugen Hristev <eugen.hristev@collabora.com>
+R:	Eugen Hristev <ehristev@kernel.org>
 L:	linux-mmc@vger.kernel.org
 S:	Supported
 F:	drivers/mmc/host/sdhci-of-at91.c

drivers/block/zram/zram_drv.c

@@ -33,6 +33,7 @@
 #include <linux/cpuhotplug.h>
 #include <linux/part_stat.h>
 #include <linux/kernel_read_file.h>
+#include <linux/rcupdate.h>
 
 #include "zram_drv.h"
 
@@ -504,6 +505,7 @@ struct zram_wb_ctl {
 	wait_queue_head_t done_wait;
 	spinlock_t done_lock;
 	atomic_t num_inflight;
+	struct rcu_head rcu;
 };
 
 struct zram_wb_req {
@@ -847,7 +849,7 @@ static void release_wb_ctl(struct zram_wb_ctl *wb_ctl)
 		release_wb_req(req);
 	}
 
-	kfree(wb_ctl);
+	kfree_rcu(wb_ctl, rcu);
 }
 
 static struct zram_wb_ctl *init_wb_ctl(struct zram *zram)
@@ -964,11 +966,13 @@ static void zram_writeback_endio(struct bio *bio)
 	struct zram_wb_ctl *wb_ctl = bio->bi_private;
 	unsigned long flags;
 
+	rcu_read_lock();
 	spin_lock_irqsave(&wb_ctl->done_lock, flags);
 	list_add(&req->entry, &wb_ctl->done_reqs);
 	spin_unlock_irqrestore(&wb_ctl->done_lock, flags);
 
 	wake_up(&wb_ctl->done_wait);
+	rcu_read_unlock();
 }
 
 static void zram_submit_wb_request(struct zram *zram,

drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c

@@ -708,7 +708,7 @@ static void mlx5e_free_xdpsq_desc(struct mlx5e_xdpsq *sq,
 				xdpi = mlx5e_xdpi_fifo_pop(xdpi_fifo);
 				page = xdpi.page.page;
 
-				/* No need to check PageNetpp() as we
+				/* No need to check page_pool_page_is_pp() as we
 				 * know this is a page_pool page.
 				 */
 				page_pool_recycle_direct(pp_page_to_nmdesc(page)->pp,

fs/hugetlbfs/inode.c

@@ -96,15 +96,8 @@ static const struct fs_parameter_spec hugetlb_fs_parameters[] = {
 #define PGOFF_LOFFT_MAX \
 	(((1UL << (PAGE_SHIFT + 1)) - 1) <<  (BITS_PER_LONG - (PAGE_SHIFT + 1)))
 
-static int hugetlb_file_mmap_prepare_success(const struct vm_area_struct *vma)
+static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma)
 {
-	/* Unfortunate we have to reassign vma->vm_private_data. */
-	return hugetlb_vma_lock_alloc((struct vm_area_struct *)vma);
-}
-
-static int hugetlbfs_file_mmap_prepare(struct vm_area_desc *desc)
-{
-	struct file *file = desc->file;
 	struct inode *inode = file_inode(file);
 	loff_t len, vma_len;
 	int ret;
@@ -119,8 +112,8 @@ static int hugetlbfs_file_mmap_prepare(struct vm_area_desc *desc)
 	 * way when do_mmap unwinds (may be important on powerpc
 	 * and ia64).
 	 */
-	vma_desc_set_flags(desc, VMA_HUGETLB_BIT, VMA_DONTEXPAND_BIT);
+	vma_set_flags(vma, VMA_HUGETLB_BIT, VMA_DONTEXPAND_BIT);
-	desc->vm_ops = &hugetlb_vm_ops;
+	vma->vm_ops = &hugetlb_vm_ops;
 
 	/*
 	 * page based offset in vm_pgoff could be sufficiently large to
@@ -129,16 +122,16 @@ static int hugetlbfs_file_mmap_prepare(struct vm_area_desc *desc)
 	 * sizeof(unsigned long).  So, only check in those instances.
 	 */
 	if (sizeof(unsigned long) == sizeof(loff_t)) {
-		if (desc->pgoff & PGOFF_LOFFT_MAX)
+		if (vma->vm_pgoff & PGOFF_LOFFT_MAX)
 			return -EINVAL;
 	}
 
 	/* must be huge page aligned */
-	if (desc->pgoff & (~huge_page_mask(h) >> PAGE_SHIFT))
+	if (vma->vm_pgoff & (~huge_page_mask(h) >> PAGE_SHIFT))
 		return -EINVAL;
 
-	vma_len = (loff_t)vma_desc_size(desc);
+	vma_len = (loff_t)(vma->vm_end - vma->vm_start);
-	len = vma_len + ((loff_t)desc->pgoff << PAGE_SHIFT);
+	len = vma_len + ((loff_t)vma->vm_pgoff << PAGE_SHIFT);
 	/* check for overflow */
 	if (len < vma_len)
 		return -EINVAL;
@@ -148,7 +141,7 @@ static int hugetlbfs_file_mmap_prepare(struct vm_area_desc *desc)
 
 	ret = -ENOMEM;
 
-	vma_flags = desc->vma_flags;
+	vma_flags = vma->flags;
 	/*
 	 * for SHM_HUGETLB, the pages are reserved in the shmget() call so skip
 	 * reserving here. Note: only for SHM hugetlbfs file, the inode
@@ -158,30 +151,17 @@ static int hugetlbfs_file_mmap_prepare(struct vm_area_desc *desc)
 		vma_flags_set(&vma_flags, VMA_NORESERVE_BIT);
 
 	if (hugetlb_reserve_pages(inode,
-			desc->pgoff >> huge_page_order(h),
+				vma->vm_pgoff >> huge_page_order(h),
-			len >> huge_page_shift(h), desc,
+				len >> huge_page_shift(h), vma,
-			vma_flags) < 0)
+				vma_flags) < 0)
 		goto out;
 
 	ret = 0;
-	if (vma_desc_test(desc, VMA_WRITE_BIT) && inode->i_size < len)
+	if (vma_test(vma, VMA_WRITE_BIT) && inode->i_size < len)
 		i_size_write(inode, len);
 out:
 	inode_unlock(inode);
 
-	if (!ret) {
-		/* Allocate the VMA lock after we set it up. */
-		desc->action.success_hook = hugetlb_file_mmap_prepare_success;
-		/*
-		 * We cannot permit the rmap finding this VMA in the time
-		 * between the VMA being inserted into the VMA tree and the
-		 * completion/success hook being invoked.
-		 *
-		 * This is because we establish a per-VMA hugetlb lock which can
-		 * be raced by rmap.
-		 */
-		desc->action.hide_from_rmap_until_complete = true;
-	}
 	return ret;
 }
 
@@ -1227,7 +1207,7 @@ static void init_once(void *foo)
 
 static const struct file_operations hugetlbfs_file_operations = {
 	.read_iter		= hugetlbfs_read_iter,
-	.mmap_prepare		= hugetlbfs_file_mmap_prepare,
+	.mmap			= hugetlbfs_file_mmap,
 	.fsync			= noop_fsync,
 	.get_unmapped_area	= hugetlb_get_unmapped_area,
 	.llseek			= default_llseek,

include/linux/hugetlb.h

@@ -148,7 +148,7 @@ int hugetlb_mfill_atomic_pte(pte_t *dst_pte,
 			     struct folio **foliop);
 #endif /* CONFIG_USERFAULTFD */
 long hugetlb_reserve_pages(struct inode *inode, long from, long to,
-			   struct vm_area_desc *desc, vma_flags_t vma_flags);
+			   struct vm_area_struct *vma, vma_flags_t vma_flags);
 long hugetlb_unreserve_pages(struct inode *inode, long start, long end,
 						long freed);
 bool folio_isolate_hugetlb(struct folio *folio, struct list_head *list);
@@ -276,7 +276,6 @@ long hugetlb_change_protection(struct vm_area_struct *vma,
 void hugetlb_unshare_all_pmds(struct vm_area_struct *vma);
 void fixup_hugetlb_reservations(struct vm_area_struct *vma);
 void hugetlb_split(struct vm_area_struct *vma, unsigned long addr);
-int hugetlb_vma_lock_alloc(struct vm_area_struct *vma);
 
 unsigned int arch_hugetlb_cma_order(void);
 
@@ -469,11 +468,6 @@ static inline void fixup_hugetlb_reservations(struct vm_area_struct *vma)
 
 static inline void hugetlb_split(struct vm_area_struct *vma, unsigned long addr) {}
 
-static inline int hugetlb_vma_lock_alloc(struct vm_area_struct *vma)
-{
-	return 0;
-}
-
 #endif /* !CONFIG_HUGETLB_PAGE */
 
 #ifndef pgd_write

include/linux/hugetlb_inline.h

@@ -6,23 +6,13 @@
 
 #ifdef CONFIG_HUGETLB_PAGE
 
-static inline bool is_vm_hugetlb_flags(vm_flags_t vm_flags)
-{
-	return !!(vm_flags & VM_HUGETLB);
-}
-
 static inline bool is_vma_hugetlb_flags(const vma_flags_t *flags)
 {
-	return vma_flags_test_any(flags, VMA_HUGETLB_BIT);
+	return vma_flags_test(flags, VMA_HUGETLB_BIT);
 }
 
 #else
 
-static inline bool is_vm_hugetlb_flags(vm_flags_t vm_flags)
-{
-	return false;
-}
-
 static inline bool is_vma_hugetlb_flags(const vma_flags_t *flags)
 {
 	return false;
@@ -32,7 +22,7 @@ static inline bool is_vma_hugetlb_flags(const vma_flags_t *flags)
 
 static inline bool is_vm_hugetlb_page(const struct vm_area_struct *vma)
 {
-	return is_vm_hugetlb_flags(vma->vm_flags);
+	return is_vma_hugetlb_flags(&vma->flags);
 }
 
 #endif

include/linux/mm.h

@@ -5174,9 +5174,10 @@ int arch_lock_shadow_stack_status(struct task_struct *t, unsigned long status);
  * DMA mapping IDs for page_pool
  *
  * When DMA-mapping a page, page_pool allocates an ID (from an xarray) and
- * stashes it in the upper bits of page->pp_magic. Non-PP pages can have
+ * stashes it in the upper bits of page->pp_magic. We always want to be able to
- * arbitrary kernel pointers stored in the same field as pp_magic (since
+ * unambiguously identify page pool pages (using page_pool_page_is_pp()). Non-PP
- * it overlaps with page->lru.next), so we must ensure that we cannot
+ * pages can have arbitrary kernel pointers stored in the same field as pp_magic
+ * (since it overlaps with page->lru.next), so we must ensure that we cannot
  * mistake a valid kernel pointer with any of the values we write into this
  * field.
  *
@@ -5211,6 +5212,26 @@ int arch_lock_shadow_stack_status(struct task_struct *t, unsigned long status);
 #define PP_DMA_INDEX_MASK GENMASK(PP_DMA_INDEX_BITS + PP_DMA_INDEX_SHIFT - 1, \
 				  PP_DMA_INDEX_SHIFT)
 
+/* Mask used for checking in page_pool_page_is_pp() below. page->pp_magic is
+ * OR'ed with PP_SIGNATURE after the allocation in order to preserve bit 0 for
+ * the head page of compound page and bit 1 for pfmemalloc page, as well as the
+ * bits used for the DMA index. page_is_pfmemalloc() is checked in
+ * __page_pool_put_page() to avoid recycling the pfmemalloc page.
+ */
+#define PP_MAGIC_MASK ~(PP_DMA_INDEX_MASK | 0x3UL)
+
+#ifdef CONFIG_PAGE_POOL
+static inline bool page_pool_page_is_pp(const struct page *page)
+{
+	return (page->pp_magic & PP_MAGIC_MASK) == PP_SIGNATURE;
+}
+#else
+static inline bool page_pool_page_is_pp(const struct page *page)
+{
+	return false;
+}
+#endif
+
 #define PAGE_SNAPSHOT_FAITHFUL (1 << 0)
 #define PAGE_SNAPSHOT_PG_BUDDY (1 << 1)
 #define PAGE_SNAPSHOT_PG_IDLE  (1 << 2)

include/linux/page-flags.h

@@ -923,7 +923,6 @@ enum pagetype {
 	PGTY_zsmalloc		= 0xf6,
 	PGTY_unaccepted		= 0xf7,
 	PGTY_large_kmalloc	= 0xf8,
-	PGTY_netpp		= 0xf9,
 
 	PGTY_mapcount_underflow = 0xff
 };
@@ -1056,11 +1055,6 @@ PAGE_TYPE_OPS(Zsmalloc, zsmalloc, zsmalloc)
 PAGE_TYPE_OPS(Unaccepted, unaccepted, unaccepted)
 PAGE_TYPE_OPS(LargeKmalloc, large_kmalloc, large_kmalloc)
 
-/*
- * Marks page_pool allocated pages.
- */
-PAGE_TYPE_OPS(Netpp, netpp, netpp)
-
 /**
  * PageHuge - Determine if the page belongs to hugetlbfs
  * @page: The page to test.

include/net/netmem.h

@@ -94,20 +94,10 @@ enum net_iov_type {
  */
 struct net_iov {
 	struct netmem_desc desc;
-	unsigned int page_type;
 	enum net_iov_type type;
 	struct net_iov_area *owner;
 };
 
-/* Make sure 'the offset of page_type in struct page == the offset of
- * type in struct net_iov'.
- */
-#define NET_IOV_ASSERT_OFFSET(pg, iov)			\
-	static_assert(offsetof(struct page, pg) ==	\
-		      offsetof(struct net_iov, iov))
-NET_IOV_ASSERT_OFFSET(page_type, page_type);
-#undef NET_IOV_ASSERT_OFFSET
-
 struct net_iov_area {
 	/* Array of net_iovs for this area. */
 	struct net_iov *niovs;
@@ -127,11 +117,7 @@ static inline unsigned int net_iov_idx(const struct net_iov *niov)
 	return niov - net_iov_owner(niov)->niovs;
 }
 
-/* Initialize a niov: stamp the owning area, the memory provider type,
+/* Initialize a niov: stamp the owning area, the memory provider type.
- * and the page_type "no type" sentinel expected by the page-type API
- * (see PAGE_TYPE_OPS in <linux/page-flags.h>) so that
- * page_pool_set_pp_info() can later call __SetPageNetpp() on a niov
- * cast to struct page.
  */
 static inline void net_iov_init(struct net_iov *niov,
 				struct net_iov_area *owner,
@@ -139,7 +125,6 @@ static inline void net_iov_init(struct net_iov *niov,
 {
 	niov->owner = owner;
 	niov->type = type;
-	niov->page_type = UINT_MAX;
 }
 
 /* netmem */
@@ -245,7 +230,7 @@ static inline unsigned long netmem_pfn_trace(netmem_ref netmem)
  */
 #define pp_page_to_nmdesc(p)						\
 ({									\
-	DEBUG_NET_WARN_ON_ONCE(!PageNetpp(p));				\
+	DEBUG_NET_WARN_ON_ONCE(!page_pool_page_is_pp(p));		\
 	__pp_page_to_nmdesc(p);						\
 })
 

ipc/util.c

@@ -253,7 +253,7 @@ static inline int ipc_idr_alloc(struct ipc_ids *ids, struct kern_ipc_perm *new)
 	} else {
 		new->seq = ipcid_to_seqx(next_id);
 		idx = idr_alloc(&ids->ipcs_idr, new, ipcid_to_idx(next_id),
-				0, GFP_NOWAIT);
+				ipc_mni, GFP_NOWAIT);
 	}
 	if (idx >= 0)
 		new->id = (new->seq << ipcmni_seq_shift()) + idx;

kernel/fork.c

@@ -2664,8 +2664,6 @@ struct task_struct *create_io_thread(int (*fn)(void *), void *arg, int node)
  *
  * It copies the process, and if successful kick-starts
  * it and waits for it to finish using the VM if required.
- *
- * args->exit_signal is expected to be checked for sanity by the caller.
  */
 pid_t kernel_clone(struct kernel_clone_args *args)
 {
@@ -2700,6 +2698,9 @@ pid_t kernel_clone(struct kernel_clone_args *args)
 	    (args->pidfd == args->parent_tid))
 		return -EINVAL;
 
+	if (!valid_signal(args->exit_signal))
+		return -EINVAL;
+
 	/*
 	 * Determine whether and which event to report to ptracer.  When
 	 * called from kernel_thread or CLONE_UNTRACED is explicitly
@@ -2898,11 +2899,9 @@ static noinline int copy_clone_args_from_user(struct kernel_clone_args *kargs,
 		return -EINVAL;
 
 	/*
-	 * Verify that higher 32bits of exit_signal are unset and that
+	 * Verify that higher 32bits of exit_signal are unset
-	 * it is a valid signal
 	 */
-	if (unlikely((args.exit_signal & ~((u64)CSIGNAL)) ||
+	if (unlikely(args.exit_signal & ~((u64)CSIGNAL)))
-		     !valid_signal(args.exit_signal)))
 		return -EINVAL;
 
 	if ((args.flags & CLONE_INTO_CGROUP) &&

mm/damon/sysfs-schemes.c

@@ -88,7 +88,6 @@ static void damon_sysfs_scheme_region_release(struct kobject *kobj)
 	struct damon_sysfs_scheme_region *region = container_of(kobj,
 			struct damon_sysfs_scheme_region, kobj);
 
-	list_del(&region->list);
 	kfree(region);
 }
 
@@ -164,7 +163,7 @@ static void damon_sysfs_scheme_regions_rm_dirs(
 	struct damon_sysfs_scheme_region *r, *next;
 
 	list_for_each_entry_safe(r, next, &regions->regions_list, list) {
-		/* release function deletes it from the list */
+		list_del(&r->list);
 		kobject_put(&r->kobj);
 		regions->nr_regions--;
 	}
@@ -2928,14 +2927,15 @@ void damos_sysfs_populate_region_dir(struct damon_sysfs_schemes *sysfs_schemes,
 	if (!region)
 		return;
 	region->sz_filter_passed = sz_filter_passed;
-	list_add_tail(&region->list, &sysfs_regions->regions_list);
-	sysfs_regions->nr_regions++;
 	if (kobject_init_and_add(&region->kobj,
 				&damon_sysfs_scheme_region_ktype,
 				&sysfs_regions->kobj, "%d",
 				sysfs_regions->nr_regions++)) {
 		kobject_put(&region->kobj);
+		return;
 	}
+	list_add_tail(&region->list, &sysfs_regions->regions_list);
+	sysfs_regions->nr_regions++;
 }
 
 int damon_sysfs_schemes_clear_regions(

mm/hugetlb.c

@@ -116,6 +116,7 @@ struct mutex *hugetlb_fault_mutex_table __ro_after_init;
 /* Forward declaration */
 static int hugetlb_acct_memory(struct hstate *h, long delta);
 static void hugetlb_vma_lock_free(struct vm_area_struct *vma);
+static void hugetlb_vma_lock_alloc(struct vm_area_struct *vma);
 static void __hugetlb_vma_unlock_write_free(struct vm_area_struct *vma);
 static void hugetlb_unshare_pmds(struct vm_area_struct *vma,
 		unsigned long start, unsigned long end, bool take_locks);
@@ -413,21 +414,17 @@ static void hugetlb_vma_lock_free(struct vm_area_struct *vma)
 	}
 }
 
-/*
+static void hugetlb_vma_lock_alloc(struct vm_area_struct *vma)
- * vma specific semaphore used for pmd sharing and fault/truncation
- * synchronization
- */
-int hugetlb_vma_lock_alloc(struct vm_area_struct *vma)
 {
 	struct hugetlb_vma_lock *vma_lock;
 
 	/* Only establish in (flags) sharable vmas */
 	if (!vma || !(vma->vm_flags & VM_MAYSHARE))
-		return 0;
+		return;
 
 	/* Should never get here with non-NULL vm_private_data */
 	if (vma->vm_private_data)
-		return -EINVAL;
+		return;
 
 	vma_lock = kmalloc_obj(*vma_lock);
 	if (!vma_lock) {
@@ -442,15 +439,13 @@ int hugetlb_vma_lock_alloc(struct vm_area_struct *vma)
 		 * allocation failure.
 		 */
 		pr_warn_once("HugeTLB: unable to allocate vma specific lock\n");
-		return -EINVAL;
+		return;
 	}
 
 	kref_init(&vma_lock->refs);
 	init_rwsem(&vma_lock->rw_sema);
 	vma_lock->vma = vma;
 	vma->vm_private_data = vma_lock;
-
-	return 0;
 }
 
 /* Helper that removes a struct file_region from the resv_map cache and returns
@@ -1147,30 +1142,22 @@ static struct resv_map *vma_resv_map(struct vm_area_struct *vma)
 	}
 }
 
+static void set_vma_resv_map(struct vm_area_struct *vma, struct resv_map *map)
+{
+	VM_WARN_ON_ONCE_VMA(!is_vm_hugetlb_page(vma), vma);
+	VM_WARN_ON_ONCE_VMA(vma_test(vma, VMA_MAYSHARE_BIT), vma);
+
+	set_vma_private_data(vma, (unsigned long)map);
+}
+
 static void set_vma_resv_flags(struct vm_area_struct *vma, unsigned long flags)
 {
 	VM_WARN_ON_ONCE_VMA(!is_vm_hugetlb_page(vma), vma);
-	VM_WARN_ON_ONCE_VMA(vma->vm_flags & VM_MAYSHARE, vma);
+	VM_WARN_ON_ONCE_VMA(vma_test(vma, VMA_MAYSHARE_BIT), vma);
 
 	set_vma_private_data(vma, get_vma_private_data(vma) | flags);
 }
 
-static void set_vma_desc_resv_map(struct vm_area_desc *desc, struct resv_map *map)
-{
-	VM_WARN_ON_ONCE(!is_vma_hugetlb_flags(&desc->vma_flags));
-	VM_WARN_ON_ONCE(vma_desc_test(desc, VMA_MAYSHARE_BIT));
-
-	desc->private_data = map;
-}
-
-static void set_vma_desc_resv_flags(struct vm_area_desc *desc, unsigned long flags)
-{
-	VM_WARN_ON_ONCE(!is_vma_hugetlb_flags(&desc->vma_flags));
-	VM_WARN_ON_ONCE(vma_desc_test(desc, VMA_MAYSHARE_BIT));
-
-	desc->private_data = (void *)((unsigned long)desc->private_data | flags);
-}
-
 static int is_vma_resv_set(struct vm_area_struct *vma, unsigned long flag)
 {
 	VM_BUG_ON_VMA(!is_vm_hugetlb_page(vma), vma);
@@ -1178,13 +1165,6 @@ static int is_vma_resv_set(struct vm_area_struct *vma, unsigned long flag)
 	return (get_vma_private_data(vma) & flag) != 0;
 }
 
-static bool is_vma_desc_resv_set(struct vm_area_desc *desc, unsigned long flag)
-{
-	VM_WARN_ON_ONCE(!is_vma_hugetlb_flags(&desc->vma_flags));
-
-	return ((unsigned long)desc->private_data) & flag;
-}
-
 bool __vma_private_lock(struct vm_area_struct *vma)
 {
 	return !(vma->vm_flags & VM_MAYSHARE) &&
@@ -6553,7 +6533,7 @@ next:
 
 long hugetlb_reserve_pages(struct inode *inode,
 		long from, long to,
-		struct vm_area_desc *desc,
+		struct vm_area_struct *vma,
 		vma_flags_t vma_flags)
 {
 	long chg = -1, add = -1, spool_resv, gbl_resv;
@@ -6570,6 +6550,12 @@ long hugetlb_reserve_pages(struct inode *inode,
 		return -EINVAL;
 	}
 
+	/*
+	 * vma specific semaphore used for pmd sharing and fault/truncation
+	 * synchronization
+	 */
+	hugetlb_vma_lock_alloc(vma);
+
 	/*
 	 * Only apply hugepage reservation if asked. At fault time, an
 	 * attempt will be made for VM_NORESERVE to allocate a page
@@ -6582,9 +6568,9 @@ long hugetlb_reserve_pages(struct inode *inode,
 	 * Shared mappings base their reservation on the number of pages that
 	 * are already allocated on behalf of the file. Private mappings need
 	 * to reserve the full area even if read-only as mprotect() may be
-	 * called to make the mapping read-write. Assume !desc is a shm mapping
+	 * called to make the mapping read-write. Assume !vma is a shm mapping
 	 */
-	if (!desc || vma_desc_test(desc, VMA_MAYSHARE_BIT)) {
+	if (!vma || vma_test(vma, VMA_MAYSHARE_BIT)) {
 		/*
 		 * resv_map can not be NULL as hugetlb_reserve_pages is only
 		 * called for inodes for which resv_maps were created (see
@@ -6603,8 +6589,8 @@ long hugetlb_reserve_pages(struct inode *inode,
 
 		chg = to - from;
 
-		set_vma_desc_resv_map(desc, resv_map);
+		set_vma_resv_map(vma, resv_map);
-		set_vma_desc_resv_flags(desc, HPAGE_RESV_OWNER);
+		set_vma_resv_flags(vma, HPAGE_RESV_OWNER);
 	}
 
 	if (chg < 0) {
@@ -6618,7 +6604,7 @@ long hugetlb_reserve_pages(struct inode *inode,
 	if (err < 0)
 		goto out_err;
 
-	if (desc && !vma_desc_test(desc, VMA_MAYSHARE_BIT) && h_cg) {
+	if (vma && !vma_test(vma, VMA_MAYSHARE_BIT) && h_cg) {
 		/* For private mappings, the hugetlb_cgroup uncharge info hangs
 		 * of the resv_map.
 		 */
@@ -6655,7 +6641,7 @@ long hugetlb_reserve_pages(struct inode *inode,
 	 * consumed reservations are stored in the map. Hence, nothing
 	 * else has to be done for private mappings here
 	 */
-	if (!desc || vma_desc_test(desc, VMA_MAYSHARE_BIT)) {
+	if (!vma || vma_test(vma, VMA_MAYSHARE_BIT)) {
 		add = region_add(resv_map, from, to, regions_needed, h, h_cg);
 
 		if (unlikely(add < 0)) {
@@ -6719,15 +6705,16 @@ out_uncharge_cgroup:
 	hugetlb_cgroup_uncharge_cgroup_rsvd(hstate_index(h),
 					    chg * pages_per_huge_page(h), h_cg);
 out_err:
-	if (!desc || vma_desc_test(desc, VMA_MAYSHARE_BIT))
+	hugetlb_vma_lock_free(vma);
+	if (!vma || vma_test(vma, VMA_MAYSHARE_BIT))
 		/* Only call region_abort if the region_chg succeeded but the
 		 * region_add failed or didn't run.
 		 */
 		if (chg >= 0 && add < 0)
 			region_abort(resv_map, from, to, regions_needed);
-	if (desc && is_vma_desc_resv_set(desc, HPAGE_RESV_OWNER)) {
+	if (vma && is_vma_resv_set(vma, HPAGE_RESV_OWNER)) {
 		kref_put(&resv_map->refs, resv_map_release);
-		set_vma_desc_resv_map(desc, NULL);
+		set_vma_resv_map(vma, NULL);
 	}
 	return err;
 }

mm/memcontrol.c

@@ -4352,6 +4352,9 @@ static void flush_nmi_stats(struct mem_cgroup *memcg, struct mem_cgroup *parent,
 			lstats->state[index] += slab;
 			if (plstats)
 				plstats->state_pending[index] += slab;
+			memcg->vmstats->state[index] += slab;
+			if (parent)
+				parent->vmstats->state_pending[index] += slab;
 		}
 		if (atomic_read(&pn->slab_unreclaimable)) {
 			int slab = atomic_xchg(&pn->slab_unreclaimable, 0);
@@ -4360,6 +4363,9 @@ static void flush_nmi_stats(struct mem_cgroup *memcg, struct mem_cgroup *parent,
 			lstats->state[index] += slab;
 			if (plstats)
 				plstats->state_pending[index] += slab;
+			memcg->vmstats->state[index] += slab;
+			if (parent)
+				parent->vmstats->state_pending[index] += slab;
 		}
 	}
 }

mm/memfd.c

@@ -283,6 +283,12 @@ int memfd_add_seals(struct file *file, unsigned int seals)
 		goto unlock;
 	}
 
+	/*
+	 * SEAL_EXEC implies SEAL_WRITE, making W^X from the start.
+	 */
+	if (seals & F_SEAL_EXEC && inode->i_mode & 0111)
+		seals |= F_SEAL_SHRINK|F_SEAL_GROW|F_SEAL_WRITE|F_SEAL_FUTURE_WRITE;
+
 	if ((seals & F_SEAL_WRITE) && !(*file_seals & F_SEAL_WRITE)) {
 		error = mapping_deny_writable(file->f_mapping);
 		if (error)
@@ -295,12 +301,6 @@ int memfd_add_seals(struct file *file, unsigned int seals)
 		}
 	}
 
-	/*
-	 * SEAL_EXEC implies SEAL_WRITE, making W^X from the start.
-	 */
-	if (seals & F_SEAL_EXEC && inode->i_mode & 0111)
-		seals |= F_SEAL_SHRINK|F_SEAL_GROW|F_SEAL_WRITE|F_SEAL_FUTURE_WRITE;
-
 	*file_seals |= seals;
 	error = 0;
 

mm/migrate_device.c

@@ -840,7 +840,7 @@ static int migrate_vma_insert_huge_pmd_page(struct migrate_vma *migrate,
 	} else {
 		if (folio_is_zone_device(folio) &&
 		    !folio_is_device_coherent(folio)) {
-			goto abort;
+			goto free_abort;
 		}
 		entry = folio_mk_pmd(folio, vma->vm_page_prot);
 		if (vma->vm_flags & VM_WRITE)
@@ -893,6 +893,8 @@ static int migrate_vma_insert_huge_pmd_page(struct migrate_vma *migrate,
 
 unlock_abort:
 	spin_unlock(ptl);
+free_abort:
+	pte_free(vma->vm_mm, pgtable);
 abort:
 	for (i = 0; i < HPAGE_PMD_NR; i++)
 		src[i] &= ~MIGRATE_PFN_MIGRATE;

mm/page_alloc.c

@@ -1035,6 +1035,7 @@ static inline bool page_expected_state(struct page *page,
 #ifdef CONFIG_MEMCG
 			page->memcg_data |
 #endif
+			page_pool_page_is_pp(page) |
 			(page->flags.f & check_flags)))
 		return false;
 
@@ -1061,6 +1062,8 @@ static const char *page_bad_reason(struct page *page, unsigned long flags)
 	if (unlikely(page->memcg_data))
 		bad_reason = "page still charged to cgroup";
 #endif
+	if (unlikely(page_pool_page_is_pp(page)))
+		bad_reason = "page_pool leak";
 	return bad_reason;
 }
 
@@ -1377,17 +1380,9 @@ __always_inline bool __free_pages_prepare(struct page *page,
 		mod_mthp_stat(order, MTHP_STAT_NR_ANON, -1);
 		folio->mapping = NULL;
 	}
-	if (unlikely(page_has_type(page))) {
+	if (unlikely(page_has_type(page)))
-		/* networking expects to clear its page type before releasing */
-		if (is_check_pages_enabled()) {
-			if (unlikely(PageNetpp(page))) {
-				bad_page(page, "page_pool leak");
-				return false;
-			}
-		}
 		/* Reset the page_type (which overlays _mapcount) */
 		page->page_type = UINT_MAX;
-	}
 
 	if (is_check_pages_enabled()) {
 		if (free_page_is_bad(page))

mm/rmap.c

@@ -2030,6 +2030,8 @@ static bool try_to_unmap_one(struct folio *folio, struct vm_area_struct *vma,
 	mmu_notifier_invalidate_range_start(&range);
 
 	while (page_vma_mapped_walk(&pvmw)) {
+		nr_pages = 1;
+
 		/*
 		 * If the folio is in an mlock()d vma, we must not swap it out.
 		 */

mm/vmalloc.c

@@ -3203,7 +3203,7 @@ struct vm_struct *__get_vm_area_node(unsigned long size,
 	struct vm_struct *area;
 	unsigned long requested_size = size;
 
-	BUG_ON(in_interrupt());
+	BUG_ON(in_nmi() || in_hardirq());
 	size = ALIGN(size, 1ul << shift);
 	if (unlikely(!size))
 		return NULL;

net/core/netmem_priv.h

@@ -8,18 +8,21 @@ static inline unsigned long netmem_get_pp_magic(netmem_ref netmem)
 	return netmem_to_nmdesc(netmem)->pp_magic & ~PP_DMA_INDEX_MASK;
 }
 
+static inline void netmem_or_pp_magic(netmem_ref netmem, unsigned long pp_magic)
+{
+	netmem_to_nmdesc(netmem)->pp_magic |= pp_magic;
+}
+
+static inline void netmem_clear_pp_magic(netmem_ref netmem)
+{
+	WARN_ON_ONCE(netmem_to_nmdesc(netmem)->pp_magic & PP_DMA_INDEX_MASK);
+
+	netmem_to_nmdesc(netmem)->pp_magic = 0;
+}
+
 static inline bool netmem_is_pp(netmem_ref netmem)
 {
-	struct page *page;
+	return (netmem_get_pp_magic(netmem) & PP_MAGIC_MASK) == PP_SIGNATURE;
-
-	/* XXX: Now that the offset of page_type is shared between
-	 * struct page and net_iov, just cast the netmem to struct page
-	 * unconditionally by clearing NET_IOV if any, no matter whether
-	 * it comes from struct net_iov or struct page.  This should be
-	 * adjusted once the offset is no longer shared.
-	 */
-	page = (struct page *)((__force unsigned long)netmem & ~NET_IOV);
-	return PageNetpp(page);
 }
 
 static inline void netmem_set_pp(netmem_ref netmem, struct page_pool *pool)

net/core/page_pool.c

@@ -707,18 +707,8 @@ s32 page_pool_inflight(const struct page_pool *pool, bool strict)
 
 void page_pool_set_pp_info(struct page_pool *pool, netmem_ref netmem)
 {
-	struct page *page;
-
 	netmem_set_pp(netmem, pool);
-
+	netmem_or_pp_magic(netmem, PP_SIGNATURE);
-	/* XXX: Now that the offset of page_type is shared between
-	 * struct page and net_iov, just cast the netmem to struct page
-	 * unconditionally by clearing NET_IOV if any, no matter whether
-	 * it comes from struct net_iov or struct page.  This should be
-	 * adjusted once the offset is no longer shared.
-	 */
-	page = (struct page *)((__force unsigned long)netmem & ~NET_IOV);
-	__SetPageNetpp(page);
 
 	/* Ensuring all pages have been split into one fragment initially:
 	 * page_pool_set_pp_info() is only called once for every page when it
@@ -733,17 +723,7 @@ void page_pool_set_pp_info(struct page_pool *pool, netmem_ref netmem)
 
 void page_pool_clear_pp_info(netmem_ref netmem)
 {
-	struct page *page;
+	netmem_clear_pp_magic(netmem);
-
-	/* XXX: Now that the offset of page_type is shared between
-	 * struct page and net_iov, just cast the netmem to struct page
-	 * unconditionally by clearing NET_IOV if any, no matter whether
-	 * it comes from struct net_iov or struct page.  This should be
-	 * adjusted once the offset is no longer shared.
-	 */
-	page = (struct page *)((__force unsigned long)netmem & ~NET_IOV);
-	__ClearPageNetpp(page);
-
 	netmem_set_pp(netmem, NULL);
 }