diff --git a/arch/x86/kernel/crash_dump_32.c b/arch/x86/kernel/crash_dump_32.c
index 32e75d0..72d0c56 100644
--- a/arch/x86/kernel/crash_dump_32.c
+++ b/arch/x86/kernel/crash_dump_32.c
@@ -47,6 +47,7 @@
 		if (!kdump_buf_page) {
 			printk(KERN_WARNING "Kdump: Kdump buffer page not"
 				" allocated\n");
+			kunmap_atomic(vaddr, KM_PTE0);
 			return -EFAULT;
 		}
 		copy_page(kdump_buf_page, vaddr);