The patch titled
Subject: mm: use vma_init() to initialize VMAs on stack and data segments
has been added to the -mm tree. Its filename is
mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments.patch
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Subject: mm: use vma_init() to initialize VMAs on stack and data segments
Make sure to initialize all VMAs properly, not only those which come from
vm_area_cachep.
Link: http://lkml.kernel.org/r/20180724121139.62570-3-kirill.shutemov@xxxxxxxxxxxxxxx
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Acked-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm/kernel/process.c | 1 +
arch/arm/mach-rpc/ecard.c | 2 +-
arch/arm64/include/asm/tlb.h | 4 +++-
arch/arm64/mm/hugetlbpage.c | 7 +++++--
arch/ia64/include/asm/tlb.h | 2 +-
arch/ia64/mm/init.c | 2 +-
arch/x86/um/mem_32.c | 2 +-
fs/hugetlbfs/inode.c | 2 ++
mm/mempolicy.c | 1 +
mm/shmem.c | 1 +
10 files changed, 17 insertions(+), 7 deletions(-)
diff -puN arch/arm64/include/asm/tlb.h~mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments arch/arm64/include/asm/tlb.h
--- a/arch/arm64/include/asm/tlb.h~mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments
+++ a/arch/arm64/include/asm/tlb.h
@@ -37,7 +37,9 @@ static inline void __tlb_remove_table(vo
static inline void tlb_flush(struct mmu_gather *tlb)
{
- struct vm_area_struct vma = { .vm_mm = tlb->mm, };
+ struct vm_area_struct vma;
+
+ vma_init(&vma, tlb->mm);
/*
* The ASID allocator will either invalidate the ASID or mark
diff -puN arch/arm64/mm/hugetlbpage.c~mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments arch/arm64/mm/hugetlbpage.c
--- a/arch/arm64/mm/hugetlbpage.c~mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments
+++ a/arch/arm64/mm/hugetlbpage.c
@@ -108,11 +108,13 @@ static pte_t get_clear_flush(struct mm_s
unsigned long pgsize,
unsigned long ncontig)
{
- struct vm_area_struct vma = { .vm_mm = mm };
+ struct vm_area_struct vma;
pte_t orig_pte = huge_ptep_get(ptep);
bool valid = pte_valid(orig_pte);
unsigned long i, saddr = addr;
+ vma_init(&vma, mm);
+
for (i = 0; i < ncontig; i++, addr += pgsize, ptep++) {
pte_t pte = ptep_get_and_clear(mm, addr, ptep);
@@ -145,9 +147,10 @@ static void clear_flush(struct mm_struct
unsigned long pgsize,
unsigned long ncontig)
{
- struct vm_area_struct vma = { .vm_mm = mm };
+ struct vm_area_struct vma;
unsigned long i, saddr = addr;
+ vma_init(&vma, mm);
for (i = 0; i < ncontig; i++, addr += pgsize, ptep++)
pte_clear(mm, addr, ptep);
diff -puN arch/arm/kernel/process.c~mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments arch/arm/kernel/process.c
--- a/arch/arm/kernel/process.c~mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments
+++ a/arch/arm/kernel/process.c
@@ -338,6 +338,7 @@ static struct vm_area_struct gate_vma =
static int __init gate_vma_init(void)
{
+ vma_init(&gate_vma, NULL);
gate_vma.vm_page_prot = PAGE_READONLY_EXEC;
return 0;
}
diff -puN arch/arm/mach-rpc/ecard.c~mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments arch/arm/mach-rpc/ecard.c
--- a/arch/arm/mach-rpc/ecard.c~mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments
+++ a/arch/arm/mach-rpc/ecard.c
@@ -237,8 +237,8 @@ static void ecard_init_pgtables(struct m
memcpy(dst_pgd, src_pgd, sizeof(pgd_t) * (EASI_SIZE / PGDIR_SIZE));
+ vma_init(&vma, mm);
vma.vm_flags = VM_EXEC;
- vma.vm_mm = mm;
flush_tlb_range(&vma, IO_START, IO_START + IO_SIZE);
flush_tlb_range(&vma, EASI_START, EASI_START + EASI_SIZE);
diff -puN arch/ia64/include/asm/tlb.h~mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments arch/ia64/include/asm/tlb.h
--- a/arch/ia64/include/asm/tlb.h~mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments
+++ a/arch/ia64/include/asm/tlb.h
@@ -120,7 +120,7 @@ ia64_tlb_flush_mmu_tlbonly(struct mmu_ga
*/
struct vm_area_struct vma;
- vma.vm_mm = tlb->mm;
+ vma_init(&vma, tlb->mm);
/* flush the address range from the tlb: */
flush_tlb_range(&vma, start, end);
/* now flush the virt. page-table area mapping the address range: */
diff -puN arch/ia64/mm/init.c~mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments arch/ia64/mm/init.c
--- a/arch/ia64/mm/init.c~mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments
+++ a/arch/ia64/mm/init.c
@@ -273,7 +273,7 @@ static struct vm_area_struct gate_vma;
static int __init gate_vma_init(void)
{
- gate_vma.vm_mm = NULL;
+ vma_init(&gate_vma, NULL);
gate_vma.vm_start = FIXADDR_USER_START;
gate_vma.vm_end = FIXADDR_USER_END;
gate_vma.vm_flags = VM_READ | VM_MAYREAD | VM_EXEC | VM_MAYEXEC;
diff -puN arch/x86/um/mem_32.c~mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments arch/x86/um/mem_32.c
--- a/arch/x86/um/mem_32.c~mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments
+++ a/arch/x86/um/mem_32.c
@@ -16,7 +16,7 @@ static int __init gate_vma_init(void)
if (!FIXADDR_USER_START)
return 0;
- gate_vma.vm_mm = NULL;
+ vma_init(&gate_vma, NULL);
gate_vma.vm_start = FIXADDR_USER_START;
gate_vma.vm_end = FIXADDR_USER_END;
gate_vma.vm_flags = VM_READ | VM_MAYREAD | VM_EXEC | VM_MAYEXEC;
diff -puN fs/hugetlbfs/inode.c~mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments fs/hugetlbfs/inode.c
--- a/fs/hugetlbfs/inode.c~mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments
+++ a/fs/hugetlbfs/inode.c
@@ -411,6 +411,7 @@ static void remove_inode_hugepages(struc
bool truncate_op = (lend == LLONG_MAX);
memset(&pseudo_vma, 0, sizeof(struct vm_area_struct));
+ vma_init(&pseudo_vma, current->mm);
pseudo_vma.vm_flags = (VM_HUGETLB | VM_MAYSHARE | VM_SHARED);
pagevec_init(&pvec);
next = start;
@@ -595,6 +596,7 @@ static long hugetlbfs_fallocate(struct f
* as input to create an allocation policy.
*/
memset(&pseudo_vma, 0, sizeof(struct vm_area_struct));
+ vma_init(&pseudo_vma, mm);
pseudo_vma.vm_flags = (VM_HUGETLB | VM_MAYSHARE | VM_SHARED);
pseudo_vma.vm_file = file;
diff -puN mm/mempolicy.c~mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments mm/mempolicy.c
--- a/mm/mempolicy.c~mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments
+++ a/mm/mempolicy.c
@@ -2505,6 +2505,7 @@ void mpol_shared_policy_init(struct shar
/* Create pseudo-vma that contains just the policy */
memset(&pvma, 0, sizeof(struct vm_area_struct));
+ vma_init(&pvma, NULL);
pvma.vm_end = TASK_SIZE; /* policy covers entire file */
mpol_set_shared_policy(sp, &pvma, new); /* adds ref */
diff -puN mm/shmem.c~mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments mm/shmem.c
--- a/mm/shmem.c~mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments
+++ a/mm/shmem.c
@@ -1421,6 +1421,7 @@ static void shmem_pseudo_vma_init(struct
{
/* Create a pseudo vma that just contains the policy */
memset(vma, 0, sizeof(*vma));
+ vma_init(vma, NULL);
/* Bias interleave by inode number to distribute better across nodes */
vma->vm_pgoff = index + info->vfs_inode.i_ino;
vma->vm_policy = mpol_shared_policy_lookup(&info->policy, index);
_
Patches currently in -mm which might be from kirill.shutemov@xxxxxxxxxxxxxxx are
mm-introduce-vma_init.patch
mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments.patch
mm-fix-vma_is_anonymous-false-positives.patch
mm-page_ext-drop-definition-of-unused-page_ext_debug_poison.patch
mm-page_ext-constify-lookup_page_ext-argument.patch
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