diff options
Diffstat (limited to 'fs/exec.c')
| -rw-r--r-- | fs/exec.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/fs/exec.c b/fs/exec.c index 1a827d55ba94..4aa19b24f281 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -701,6 +701,7 @@ static int shift_arg_pages(struct vm_area_struct *vma, unsigned long shift) if (vma != vma_next(&vmi)) return -EFAULT; + vma_iter_prev_range(&vmi); /* * cover the whole range: [new_start, old_end) */ @@ -712,7 +713,7 @@ static int shift_arg_pages(struct vm_area_struct *vma, unsigned long shift) * process cleanup to remove whatever mess we made. */ if (length != move_page_tables(vma, old_start, - vma, new_start, length, false)) + vma, new_start, length, false, true)) return -ENOMEM; lru_add_drain(); @@ -985,8 +986,6 @@ static int exec_mmap(struct mm_struct *mm) tsk = current; old_mm = current->mm; exec_mm_release(tsk, old_mm); - if (old_mm) - sync_mm_rss(old_mm); ret = down_write_killable(&tsk->signal->exec_update_lock); if (ret) @@ -1276,8 +1275,8 @@ int begin_new_exec(struct linux_binprm * bprm) /* * Must be called _before_ exec_mmap() as bprm->mm is - * not visible until then. This also enables the update - * to be lockless. + * not visible until then. Doing it here also ensures + * we don't race against replace_mm_exe_file(). */ retval = set_mm_exe_file(bprm->mm, bprm->file); if (retval) |