Merge tag 'mm-stable-2022-10-08' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull MM updates from Andrew Morton:

 - Yu Zhao's Multi-Gen LRU patches are here. They've been under test in
   linux-next for a couple of months without, to my knowledge, any
   negative reports (or any positive ones, come to that).

 - Also the Maple Tree from Liam Howlett. An overlapping range-based
   tree for vmas. It it apparently slightly more efficient in its own
   right, but is mainly targeted at enabling work to reduce mmap_lock
   contention.

   Liam has identified a number of other tree users in the kernel which
   could be beneficially onverted to mapletrees.

   Yu Zhao has identified a hard-to-hit but "easy to fix" lockdep splat
   at [1]. This has yet to be addressed due to Liam's unfortunately
   timed vacation. He is now back and we'll get this fixed up.

 - Dmitry Vyukov introduces KMSAN: the Kernel Memory Sanitizer. It uses
   clang-generated instrumentation to detect used-unintialized bugs down
   to the single bit level.

   KMSAN keeps finding bugs. New ones, as well as the legacy ones.

 - Yang Shi adds a userspace mechanism (madvise) to induce a collapse of
   memory into THPs.

 - Zach O'Keefe has expanded Yang Shi's madvise(MADV_COLLAPSE) to
   support file/shmem-backed pages.

 - userfaultfd updates from Axel Rasmussen

 - zsmalloc cleanups from Alexey Romanov

 - cleanups from Miaohe Lin: vmscan, hugetlb_cgroup, hugetlb and
   memory-failure

 - Huang Ying adds enhancements to NUMA balancing memory tiering mode's
   page promotion, with a new way of detecting hot pages.

 - memcg updates from Shakeel Butt: charging optimizations and reduced
   memory consumption.

 - memcg cleanups from Kairui Song.

 - memcg fixes and cleanups from Johannes Weiner.

 - Vishal Moola provides more folio conversions

 - Zhang Yi removed ll_rw_block() :(

 - migration enhancements from Peter Xu

 - migration error-path bugfixes from Huang Ying

 - Aneesh Kumar added ability for a device driver to alter the memory
   tiering promotion paths. For optimizations by PMEM drivers, DRM
   drivers, etc.

 - vma merging improvements from Jakub Matěn.

 - NUMA hinting cleanups from David Hildenbrand.

 - xu xin added aditional userspace visibility into KSM merging
   activity.

 - THP & KSM code consolidation from Qi Zheng.

 - more folio work from Matthew Wilcox.

 - KASAN updates from Andrey Konovalov.

 - DAMON cleanups from Kaixu Xia.

 - DAMON work from SeongJae Park: fixes, cleanups.

 - hugetlb sysfs cleanups from Muchun Song.

 - Mike Kravetz fixes locking issues in hugetlbfs and in hugetlb core.

Link: https://lkml.kernel.org/r/CAOUHufZabH85CeUN-MEMgL8gJGzJEWUrkiM58JkTbBhh-jew0Q@mail.gmail.com [1]

* tag 'mm-stable-2022-10-08' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (555 commits)
  hugetlb: allocate vma lock for all sharable vmas
  hugetlb: take hugetlb vma_lock when clearing vma_lock->vma pointer
  hugetlb: fix vma lock handling during split vma and range unmapping
  mglru: mm/vmscan.c: fix imprecise comments
  mm/mglru: don't sync disk for each aging cycle
  mm: memcontrol: drop dead CONFIG_MEMCG_SWAP config symbol
  mm: memcontrol: use do_memsw_account() in a few more places
  mm: memcontrol: deprecate swapaccounting=0 mode
  mm: memcontrol: don't allocate cgroup swap arrays when memcg is disabled
  mm/secretmem: remove reduntant return value
  mm/hugetlb: add available_huge_pages() func
  mm: remove unused inline functions from include/linux/mm_inline.h
  selftests/vm: add selftest for MADV_COLLAPSE of uffd-minor memory
  selftests/vm: add file/shmem MADV_COLLAPSE selftest for cleared pmd
  selftests/vm: add thp collapse shmem testing
  selftests/vm: add thp collapse file and tmpfs testing
  selftests/vm: modularize thp collapse memory operations
  selftests/vm: dedup THP helpers
  mm/khugepaged: add tracepoint to hpage_collapse_scan_file()
  mm/madvise: add file and shmem support to MADV_COLLAPSE
  ...

1 files changed, 0 insertions, 141 deletions

diff --git a/lib/test_kasan_module.c b/lib/test_kasan_module.c
deleted file mode 100644
index b112cbc835e9..000000000000
--- a/lib/test_kasan_module.c
+++ /dev/null
@@ -1,141 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- *
- * Copyright (c) 2014 Samsung Electronics Co., Ltd.
- * Author: Andrey Ryabinin <a.ryabinin@samsung.com>
- */
-
-#define pr_fmt(fmt) "kasan test: %s " fmt, __func__
-
-#include <linux/mman.h>
-#include <linux/module.h>
-#include <linux/printk.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-
-#include "../mm/kasan/kasan.h"
-
-static noinline void __init copy_user_test(void)
-{
-	char *kmem;
-	char __user *usermem;
-	size_t size = 128 - KASAN_GRANULE_SIZE;
-	int __maybe_unused unused;
-
-	kmem = kmalloc(size, GFP_KERNEL);
-	if (!kmem)
-		return;
-
-	usermem = (char __user *)vm_mmap(NULL, 0, PAGE_SIZE,
-			    PROT_READ | PROT_WRITE | PROT_EXEC,
-			    MAP_ANONYMOUS | MAP_PRIVATE, 0);
-	if (IS_ERR(usermem)) {
-		pr_err("Failed to allocate user memory\n");
-		kfree(kmem);
-		return;
-	}
-
-	OPTIMIZER_HIDE_VAR(size);
-
-	pr_info("out-of-bounds in copy_from_user()\n");
-	unused = copy_from_user(kmem, usermem, size + 1);
-
-	pr_info("out-of-bounds in copy_to_user()\n");
-	unused = copy_to_user(usermem, kmem, size + 1);
-
-	pr_info("out-of-bounds in __copy_from_user()\n");
-	unused = __copy_from_user(kmem, usermem, size + 1);
-
-	pr_info("out-of-bounds in __copy_to_user()\n");
-	unused = __copy_to_user(usermem, kmem, size + 1);
-
-	pr_info("out-of-bounds in __copy_from_user_inatomic()\n");
-	unused = __copy_from_user_inatomic(kmem, usermem, size + 1);
-
-	pr_info("out-of-bounds in __copy_to_user_inatomic()\n");
-	unused = __copy_to_user_inatomic(usermem, kmem, size + 1);
-
-	pr_info("out-of-bounds in strncpy_from_user()\n");
-	unused = strncpy_from_user(kmem, usermem, size + 1);
-
-	vm_munmap((unsigned long)usermem, PAGE_SIZE);
-	kfree(kmem);
-}
-
-static struct kasan_rcu_info {
-	int i;
-	struct rcu_head rcu;
-} *global_rcu_ptr;
-
-static noinline void __init kasan_rcu_reclaim(struct rcu_head *rp)
-{
-	struct kasan_rcu_info *fp = container_of(rp,
-						struct kasan_rcu_info, rcu);
-
-	kfree(fp);
-	((volatile struct kasan_rcu_info *)fp)->i;
-}
-
-static noinline void __init kasan_rcu_uaf(void)
-{
-	struct kasan_rcu_info *ptr;
-
-	pr_info("use-after-free in kasan_rcu_reclaim\n");
-	ptr = kmalloc(sizeof(struct kasan_rcu_info), GFP_KERNEL);
-	if (!ptr) {
-		pr_err("Allocation failed\n");
-		return;
-	}
-
-	global_rcu_ptr = rcu_dereference_protected(ptr, NULL);
-	call_rcu(&global_rcu_ptr->rcu, kasan_rcu_reclaim);
-}
-
-static noinline void __init kasan_workqueue_work(struct work_struct *work)
-{
-	kfree(work);
-}
-
-static noinline void __init kasan_workqueue_uaf(void)
-{
-	struct workqueue_struct *workqueue;
-	struct work_struct *work;
-
-	workqueue = create_workqueue("kasan_wq_test");
-	if (!workqueue) {
-		pr_err("Allocation failed\n");
-		return;
-	}
-	work = kmalloc(sizeof(struct work_struct), GFP_KERNEL);
-	if (!work) {
-		pr_err("Allocation failed\n");
-		return;
-	}
-
-	INIT_WORK(work, kasan_workqueue_work);
-	queue_work(workqueue, work);
-	destroy_workqueue(workqueue);
-
-	pr_info("use-after-free on workqueue\n");
-	((volatile struct work_struct *)work)->data;
-}
-
-static int __init test_kasan_module_init(void)
-{
-	/*
-	 * Temporarily enable multi-shot mode. Otherwise, KASAN would only
-	 * report the first detected bug and panic the kernel if panic_on_warn
-	 * is enabled.
-	 */
-	bool multishot = kasan_save_enable_multi_shot();
-
-	copy_user_test();
-	kasan_rcu_uaf();
-	kasan_workqueue_uaf();
-
-	kasan_restore_multi_shot(multishot);
-	return -EAGAIN;
-}
-
-module_init(test_kasan_module_init);
-MODULE_LICENSE("GPL");