1 files changed, 7 insertions, 1 deletions
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index 59b43a068872..5fd7d2b3da82 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -361,7 +361,13 @@ read_kcore(struct file *file, char __user *buffer, size_t buflen, loff_t *fpos)
 				/* don't dump ioremap'd stuff! (TA) */
 				if (m->flags & VM_IOREMAP)
 					continue;
-				memcpy(elf_buf + (vmstart - start),
+				/*
+				 * we may access memory holes, then use
+				 * ex_table. checking return value just for
+				 * avoid warnings.
+				 */
+				vmsize = __copy_from_user_inatomic(
+					elf_buf + (vmstart - start),
 					(char *)vmstart, vmsize);
 			}
 			read_unlock(&vmlist_lock);