1 files changed, 24 insertions, 18 deletions

diff --git a/fs/compat.c b/fs/compat.c
index e5f49f538502..d1ece79b6411 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -1393,10 +1393,20 @@ int compat_do_execve(char * filename,
         if (!bprm)
                 goto out_ret;
 
+        retval = mutex_lock_interruptible(&current->cred_exec_mutex);
+        if (retval < 0)
+                goto out_free;
+
+        retval = -ENOMEM;
+        bprm->cred = prepare_exec_creds();
+        if (!bprm->cred)
+                goto out_unlock;
+        check_unsafe_exec(bprm);
+
         file = open_exec(filename);
         retval = PTR_ERR(file);
         if (IS_ERR(file))
-                goto out_kfree;
+                goto out_unlock;
 
         sched_exec();
 
@@ -1410,14 +1420,10 @@ int compat_do_execve(char * filename,
 
         bprm->argc = compat_count(argv, MAX_ARG_STRINGS);
         if ((retval = bprm->argc) < 0)
-                goto out_mm;
+                goto out;
 
         bprm->envc = compat_count(envp, MAX_ARG_STRINGS);
         if ((retval = bprm->envc) < 0)
-                goto out_mm;
-
-        retval = security_bprm_alloc(bprm);
-        if (retval)
                 goto out;
 
         retval = prepare_binprm(bprm);
@@ -1438,19 +1444,16 @@ int compat_do_execve(char * filename,
                 goto out;
 
         retval = search_binary_handler(bprm, regs);
-        if (retval >= 0) {
-                /* execve success */
-                security_bprm_free(bprm);
-                acct_update_integrals(current);
-                free_bprm(bprm);
-                return retval;
-        }
+        if (retval < 0)
+                goto out;
 
-out:
-        if (bprm->security)
-                security_bprm_free(bprm);
+        /* execve succeeded */
+        mutex_unlock(&current->cred_exec_mutex);
+        acct_update_integrals(current);
+        free_bprm(bprm);
+        return retval;
 
-out_mm:
+out:
         if (bprm->mm)
                 mmput(bprm->mm);
 
@@ -1460,7 +1463,10 @@ out_file:
                 fput(bprm->file);
         }
 
-out_kfree:
+out_unlock:
+        mutex_unlock(&current->cred_exec_mutex);
+
+out_free:
         free_bprm(bprm);
 
 out_ret: