diff options
| author | Andrew Morton <akpm@linux-foundation.org> | 2018-08-21 21:53:06 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-22 10:52:44 -0700 |
| commit | a670468f5e0b5fad4db6e4d195f15915dc2a35c1 (patch) | |
| tree | 57540edd0f9f24335154139c17695a13b594fe58 /arch | |
| parent | a3bf6ce366496016990d8578af74673ea04178ff (diff) | |
mm: zero out the vma in vma_init()
Rather than in vm_area_alloc(). To ensure that the various oddball
stack-based vmas are in a good state. Some of the callers were zeroing
them out, others were not.
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/kernel/process.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c index d9c299133111..82ab015bf42b 100644 --- a/arch/arm/kernel/process.c +++ b/arch/arm/kernel/process.c @@ -330,16 +330,15 @@ unsigned long arch_randomize_brk(struct mm_struct *mm) * atomic helpers. Insert it into the gate_vma so that it is visible * through ptrace and /proc/<pid>/mem. */ -static struct vm_area_struct gate_vma = { - .vm_start = 0xffff0000, - .vm_end = 0xffff0000 + PAGE_SIZE, - .vm_flags = VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYEXEC, -}; +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; + gate_vma.vm_start = 0xffff0000; + gate_vma.vm_end = 0xffff0000 + PAGE_SIZE; + gate_vma.vm_flags = VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYEXEC; return 0; } arch_initcall(gate_vma_init); |