Merge tag 'mm-hotfixes-stable-2022-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull last (?) hotfixes from Andrew Morton:
 "26 hotfixes.

  8 are for issues which were introduced during this -rc cycle, 18 are
  for earlier issues, and are cc:stable"

* tag 'mm-hotfixes-stable-2022-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (26 commits)
  x86/uaccess: avoid check_object_size() in copy_from_user_nmi()
  mm/page_isolation: fix isolate_single_pageblock() isolation behavior
  mm,hwpoison: check mm when killing accessing process
  mm/hugetlb: correct demote page offset logic
  mm: prevent page_frag_alloc() from corrupting the memory
  mm: bring back update_mmu_cache() to finish_fault()
  frontswap: don't call ->init if no ops are registered
  mm/huge_memory: use pfn_to_online_page() in split_huge_pages_all()
  mm: fix madivse_pageout mishandling on non-LRU page
  powerpc/64s/radix: don't need to broadcast IPI for radix pmd collapse flush
  mm: gup: fix the fast GUP race against THP collapse
  mm: fix dereferencing possible ERR_PTR
  vmscan: check folio_test_private(), not folio_get_private()
  mm: fix VM_BUG_ON in __delete_from_swap_cache()
  tools: fix compilation after gfp_types.h split
  mm/damon/dbgfs: fix memory leak when using debugfs_lookup()
  mm/migrate_device.c: copy pte dirty bit to page
  mm/migrate_device.c: add missing flush_cache_page()
  mm/migrate_device.c: flush TLB while holding PTL
  x86/mm: disable instrumentations of mm/pgprot.c
  ...

3 files changed, 4 insertions, 10 deletions

diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c
index 698274109c91..e712f80fe189 100644
--- a/arch/powerpc/mm/book3s64/radix_pgtable.c
+++ b/arch/powerpc/mm/book3s64/radix_pgtable.c
@@ -937,15 +937,6 @@ pmd_t radix__pmdp_collapse_flush(struct vm_area_struct *vma, unsigned long addre
 	pmd = *pmdp;
 	pmd_clear(pmdp);
 
-	/*
-	 * pmdp collapse_flush need to ensure that there are no parallel gup
-	 * walk after this call. This is needed so that we can have stable
-	 * page ref count when collapsing a page. We don't allow a collapse page
-	 * if we have gup taken on the page. We can ensure that by sending IPI
-	 * because gup walk happens with IRQ disabled.
-	 */
-	serialize_against_pte_lookup(vma->vm_mm);
-
 	radix__flush_tlb_collapsed_pmd(vma->vm_mm, address);
 
 	return pmd;
diff --git a/arch/x86/lib/usercopy.c b/arch/x86/lib/usercopy.c
index ad0139d25401..f1bb18617156 100644
--- a/arch/x86/lib/usercopy.c
+++ b/arch/x86/lib/usercopy.c
@@ -44,7 +44,7 @@ copy_from_user_nmi(void *to, const void __user *from, unsigned long n)
 	 * called from other contexts.
 	 */
 	pagefault_disable();
-	ret = __copy_from_user_inatomic(to, from, n);
+	ret = raw_copy_from_user(to, from, n);
 	pagefault_enable();
 
 	return ret;
diff --git a/arch/x86/mm/Makefile b/arch/x86/mm/Makefile
index f8220fd2c169..829c1409ffbd 100644
--- a/arch/x86/mm/Makefile
+++ b/arch/x86/mm/Makefile
@@ -4,10 +4,12 @@ KCOV_INSTRUMENT_tlb.o			:= n
 KCOV_INSTRUMENT_mem_encrypt.o		:= n
 KCOV_INSTRUMENT_mem_encrypt_amd.o	:= n
 KCOV_INSTRUMENT_mem_encrypt_identity.o	:= n
+KCOV_INSTRUMENT_pgprot.o		:= n
 
 KASAN_SANITIZE_mem_encrypt.o		:= n
 KASAN_SANITIZE_mem_encrypt_amd.o	:= n
 KASAN_SANITIZE_mem_encrypt_identity.o	:= n
+KASAN_SANITIZE_pgprot.o		:= n
 
 # Disable KCSAN entirely, because otherwise we get warnings that some functions
 # reference __initdata sections.
@@ -17,6 +19,7 @@ ifdef CONFIG_FUNCTION_TRACER
 CFLAGS_REMOVE_mem_encrypt.o		= -pg
 CFLAGS_REMOVE_mem_encrypt_amd.o		= -pg
 CFLAGS_REMOVE_mem_encrypt_identity.o	= -pg
+CFLAGS_REMOVE_pgprot.o			= -pg
 endif
 
 obj-y				:=  init.o init_$(BITS).o fault.o ioremap.o extable.o mmap.o \