1 files changed, 10 insertions, 2 deletions

diff --git a/block/partitions/efi.c b/block/partitions/efi.c
index b62fb88b8711..ff5804e2f1d2 100644
--- a/block/partitions/efi.c
+++ b/block/partitions/efi.c
@@ -310,15 +310,23 @@ static int is_gpt_valid(struct parsed_partitions *state, u64 lba,
                 goto fail;
         }
 
-        /* Check the GUID Partition Table header size */
+        /* Check the GUID Partition Table header size is too big */
         if (le32_to_cpu((*gpt)->header_size) >
                         bdev_logical_block_size(state->bdev)) {
-                pr_debug("GUID Partition Table Header size is wrong: %u > %u\n",
+                pr_debug("GUID Partition Table Header size is too large: %u > %u\n",
                         le32_to_cpu((*gpt)->header_size),
                         bdev_logical_block_size(state->bdev));
                 goto fail;
         }
 
+        /* Check the GUID Partition Table header size is too small */
+        if (le32_to_cpu((*gpt)->header_size) < sizeof(gpt_header)) {
+                pr_debug("GUID Partition Table Header size is too small: %u < %zu\n",
+                        le32_to_cpu((*gpt)->header_size),
+                        sizeof(gpt_header));
+                goto fail;
+        }
+
         /* Check the GUID Partition Table CRC */
         origcrc = le32_to_cpu((*gpt)->header_crc32);
         (*gpt)->header_crc32 = 0;