diff --git a/fs/pstore/ram_core.c b/fs/pstore/ram_core.c
index b4ec8009b8dc..ae941777037b 100644
--- a/fs/pstore/ram_core.c
+++ b/fs/pstore/ram_core.c
@@ -505,6 +505,12 @@ static int persistent_ram_buffer_map(phys_addr_t start, phys_addr_t size,
 	prz->paddr = start;
 	prz->size = size;
 
+	if (size <= sizeof(struct persistent_ram_buffer)) {
+		pr_err("%s: persistent ram zone too small (%#llx bytes)\n",
+		       prz->label, (unsigned long long)size);
+		return -EINVAL;
+	}
+
 	if (pfn_valid(start >> PAGE_SHIFT))
 		prz->vaddr = persistent_ram_vmap(start, size, memtype);
 	else