1 files changed, 32 insertions, 13 deletions

diff --git a/fs/exec.c b/fs/exec.c
index 183059c427b9..72e961a62adb 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -290,7 +290,7 @@ static int __bprm_mm_init(struct linux_binprm *bprm)
 	struct vm_area_struct *vma = NULL;
 	struct mm_struct *mm = bprm->mm;
 
-	bprm->vma = vma = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL);
+	bprm->vma = vma = vm_area_alloc(mm);
 	if (!vma)
 		return -ENOMEM;
 
@@ -298,7 +298,6 @@ static int __bprm_mm_init(struct linux_binprm *bprm)
 		err = -EINTR;
 		goto err_free;
 	}
-	vma->vm_mm = mm;
 
 	/*
 	 * Place the stack at the largest stack address the architecture
@@ -311,7 +310,6 @@ static int __bprm_mm_init(struct linux_binprm *bprm)
 	vma->vm_start = vma->vm_end - PAGE_SIZE;
 	vma->vm_flags = VM_SOFTDIRTY | VM_STACK_FLAGS | VM_STACK_INCOMPLETE_SETUP;
 	vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
-	INIT_LIST_HEAD(&vma->anon_vma_chain);
 
 	err = insert_vm_struct(mm, vma);
 	if (err)
@@ -326,7 +324,7 @@ err:
 	up_write(&mm->mmap_sem);
 err_free:
 	bprm->vma = NULL;
-	kmem_cache_free(vm_area_cachep, vma);
+	vm_area_free(vma);
 	return err;
 }
 
@@ -1706,14 +1704,13 @@ static int exec_binprm(struct linux_binprm *bprm)
 /*
  * sys_execve() executes a new program.
  */
-static int do_execveat_common(int fd, struct filename *filename,
-			      struct user_arg_ptr argv,
-			      struct user_arg_ptr envp,
-			      int flags)
+static int __do_execve_file(int fd, struct filename *filename,
+			    struct user_arg_ptr argv,
+			    struct user_arg_ptr envp,
+			    int flags, struct file *file)
 {
 	char *pathbuf = NULL;
 	struct linux_binprm *bprm;
-	struct file *file;
 	struct files_struct *displaced;
 	int retval;
 
@@ -1752,7 +1749,8 @@ static int do_execveat_common(int fd, struct filename *filename,
 	check_unsafe_exec(bprm);
 	current->in_execve = 1;
 
-	file = do_open_execat(fd, filename, flags);
+	if (!file)
+		file = do_open_execat(fd, filename, flags);
 	retval = PTR_ERR(file);
 	if (IS_ERR(file))
 		goto out_unmark;
@@ -1760,7 +1758,9 @@ static int do_execveat_common(int fd, struct filename *filename,
 	sched_exec();
 
 	bprm->file = file;
-	if (fd == AT_FDCWD || filename->name[0] == '/') {
+	if (!filename) {
+		bprm->filename = "none";
+	} else if (fd == AT_FDCWD || filename->name[0] == '/') {
 		bprm->filename = filename->name;
 	} else {
 		if (filename->name[0] == '\0')
@@ -1822,11 +1822,13 @@ static int do_execveat_common(int fd, struct filename *filename,
 	current->fs->in_exec = 0;
 	current->in_execve = 0;
 	membarrier_execve(current);
+	rseq_execve(current);
 	acct_update_integrals(current);
 	task_numa_free(current);
 	free_bprm(bprm);
 	kfree(pathbuf);
-	putname(filename);
+	if (filename)
+		putname(filename);
 	if (displaced)
 		put_files_struct(displaced);
 	return retval;
@@ -1849,10 +1851,27 @@ out_files:
 	if (displaced)
 		reset_files_struct(displaced);
 out_ret:
-	putname(filename);
+	if (filename)
+		putname(filename);
 	return retval;
 }
 
+static int do_execveat_common(int fd, struct filename *filename,
+			      struct user_arg_ptr argv,
+			      struct user_arg_ptr envp,
+			      int flags)
+{
+	return __do_execve_file(fd, filename, argv, envp, flags, NULL);
+}
+
+int do_execve_file(struct file *file, void *__argv, void *__envp)
+{
+	struct user_arg_ptr argv = { .ptr.native = __argv };
+	struct user_arg_ptr envp = { .ptr.native = __envp };
+
+	return __do_execve_file(AT_FDCWD, NULL, argv, envp, 0, file);
+}
+
 int do_execve(struct filename *filename,
 	const char __user *const __user *__argv,
 	const char __user *const __user *__envp)