diff --git a/fs/pstore/ram_core.c b/fs/pstore/ram_core.c
index 8741b57dbdc3..792735c08af7 100644
--- a/fs/pstore/ram_core.c
+++ b/fs/pstore/ram_core.c
@@ -444,6 +444,13 @@ static void *persistent_ram_vmap(phys_addr_t start, size_t size,
 	vaddr = vmap(pages, page_count, VM_MAP | VM_IOREMAP, prot);
 	kfree(pages);
 
+	/*
+	 * vmap() may fail and return NULL. Do not add the offset in this
+	 * case, otherwise a NULL mapping would appear successful.
+	 */
+	if (!vaddr)
+		return NULL;
+
 	/*
 	 * Since vmap() uses page granularity, we must add the offset
 	 * into the page here, to get the byte granularity address