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-rw-r--r--mm/mmap.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/mm/mmap.c b/mm/mmap.c
index e06345aafa03..bd2e1a533bc1 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -42,6 +42,7 @@
#include <linux/printk.h>
#include <linux/userfaultfd_k.h>
#include <linux/moduleparam.h>
+#include <linux/pkeys.h>
#include <asm/uaccess.h>
#include <asm/cacheflush.h>
@@ -1145,6 +1146,7 @@ unsigned long do_mmap(struct file *file, unsigned long addr,
unsigned long pgoff, unsigned long *populate)
{
struct mm_struct *mm = current->mm;
+ int pkey = 0;
*populate = 0;
@@ -1184,11 +1186,17 @@ unsigned long do_mmap(struct file *file, unsigned long addr,
if (offset_in_page(addr))
return addr;
+ if (prot == PROT_EXEC) {
+ pkey = execute_only_pkey(mm);
+ if (pkey < 0)
+ pkey = 0;
+ }
+
/* Do simple checking here so the lower-level routines won't have
* to. we assume access permissions have been handled by the open
* of the memory object, so we don't do any here.
*/
- vm_flags |= calc_vm_prot_bits(prot) | calc_vm_flag_bits(flags) |
+ vm_flags |= calc_vm_prot_bits(prot, pkey) | calc_vm_flag_bits(flags) |
mm->def_flags | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC;
if (flags & MAP_LOCKED)