summaryrefslogtreecommitdiffstats
path: root/mm/mprotect.c
diff options
context:
space:
mode:
Diffstat (limited to 'mm/mprotect.c')
-rw-r--r--mm/mprotect.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/mm/mprotect.c b/mm/mprotect.c
index f7cb3d4..fa37c4c 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -24,6 +24,7 @@
#include <linux/migrate.h>
#include <linux/perf_event.h>
#include <linux/ksm.h>
+#include <linux/pkeys.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/cacheflush.h>
@@ -354,7 +355,7 @@ fail:
SYSCALL_DEFINE3(mprotect, unsigned long, start, size_t, len,
unsigned long, prot)
{
- unsigned long vm_flags, nstart, end, tmp, reqprot;
+ unsigned long nstart, end, tmp, reqprot;
struct vm_area_struct *vma, *prev;
int error = -EINVAL;
const int grows = prot & (PROT_GROWSDOWN|PROT_GROWSUP);
@@ -380,8 +381,6 @@ SYSCALL_DEFINE3(mprotect, unsigned long, start, size_t, len,
if ((prot & PROT_READ) && (current->personality & READ_IMPLIES_EXEC))
prot |= PROT_EXEC;
- vm_flags = calc_vm_prot_bits(prot);
-
down_write(&current->mm->mmap_sem);
vma = find_vma(current->mm, start);
@@ -411,10 +410,11 @@ SYSCALL_DEFINE3(mprotect, unsigned long, start, size_t, len,
for (nstart = start ; ; ) {
unsigned long newflags;
+ int pkey = arch_override_mprotect_pkey(vma, prot, -1);
/* Here we know that vma->vm_start <= nstart < vma->vm_end. */
- newflags = vm_flags;
+ newflags = calc_vm_prot_bits(prot, pkey);
newflags |= (vma->vm_flags & ~(VM_READ | VM_WRITE | VM_EXEC));
/* newflags >> 4 shift VM_MAY% in place of VM_% */
OpenPOWER on IntegriCloud