1 files changed, 11 insertions, 2 deletions

diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index 7dc85997e96c..c57d9ce5ff7e 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -171,6 +171,9 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm,
 #ifdef ELF_FDPIC_PLAT_INIT
         unsigned long dynaddr;
 #endif
+#ifndef CONFIG_MMU
+        unsigned long stack_prot;
+#endif
         struct file *interpreter = NULL; /* to shut gcc up */
         char *interpreter_name = NULL;
         int executable_stack;
@@ -316,6 +319,8 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm,
          * defunct, deceased, etc. after this point we have to exit via
          * error_kill */
         set_personality(PER_LINUX_FDPIC);
+        if (elf_read_implies_exec(&exec_params.hdr, executable_stack))
+                current->personality |= READ_IMPLIES_EXEC;
         set_binfmt(&elf_fdpic_format);
 
         current->mm->start_code = 0;
@@ -377,9 +382,13 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm,
         if (stack_size < PAGE_SIZE * 2)
                 stack_size = PAGE_SIZE * 2;
 
+        stack_prot = PROT_READ | PROT_WRITE;
+        if (executable_stack == EXSTACK_ENABLE_X ||
+            (executable_stack == EXSTACK_DEFAULT && VM_STACK_FLAGS & VM_EXEC))
+                stack_prot |= PROT_EXEC;
+
         down_write(&current->mm->mmap_sem);
-        current->mm->start_brk = do_mmap(NULL, 0, stack_size,
-                                         PROT_READ | PROT_WRITE | PROT_EXEC,
+        current->mm->start_brk = do_mmap(NULL, 0, stack_size, stack_prot,
                                          MAP_PRIVATE | MAP_ANONYMOUS |
                                          MAP_UNINITIALIZED | MAP_GROWSDOWN,
                                          0);