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mm: use vma_init() to initialize VMAs on stack and data segments

Browse source 
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@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kirill A. Shutemov 2018-07-26 16:37:30 -07:00 committed by Linus Torvalds
parent 027232da7c
commit 2c4541e24c
10 changed files with 17 additions and 7 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

1
arch/arm/kernel/process.c
View file

@ -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;
}

2
arch/arm/mach-rpc/ecard.c
View file

@ -237,8 +237,8 @@ static void ecard_init_pgtables(struct mm_struct *mm)
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);

4
arch/arm64/include/asm/tlb.h
View file

@ -37,7 +37,9 @@ static inline void __tlb_remove_table(void *_table)
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

7
arch/arm64/mm/hugetlbpage.c
View file

@ -108,11 +108,13 @@ static pte_t get_clear_flush(struct mm_struct *mm,
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 *mm,
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);

2
arch/ia64/include/asm/tlb.h
View file

@ -120,7 +120,7 @@ ia64_tlb_flush_mmu_tlbonly(struct mmu_gather *tlb, unsigned long start, unsigned
*/
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: */

2
arch/ia64/mm/init.c
View file

@ -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;

2
arch/x86/um/mem_32.c
View file

@ -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;

2
fs/hugetlbfs/inode.c
View file

@ -411,6 +411,7 @@ static void remove_inode_hugepages(struct inode *inode, loff_t lstart,
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 file *file, int mode, loff_t offset,
* 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;

1
mm/mempolicy.c
View file

@ -2505,6 +2505,7 @@ void mpol_shared_policy_init(struct shared_policy *sp, struct mempolicy *mpol)
/* 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 */

1
mm/shmem.c
View file

@ -1421,6 +1421,7 @@ static void shmem_pseudo_vma_init(struct vm_area_struct *vma,
{
/* 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);