1 files changed, 2 insertions, 1 deletions

diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 17ee7e5a3451..656476eedb1b 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -241,7 +241,8 @@ int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, in
                 if (write) {
                         copy_to_user_page(vma, page, addr,
                                           maddr + offset, buf, bytes);
-                        set_page_dirty_lock(page);
+                        if (!PageCompound(page))
+                                set_page_dirty_lock(page);
                 } else {
                         copy_from_user_page(vma, page, addr,
                                             buf, maddr + offset, bytes);