1 files changed, 5 insertions, 0 deletions

diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c
index c6826d1e8082..746e7fd08aad 100644
--- a/arch/x86/kernel/cpu/microcode/intel.c
+++ b/arch/x86/kernel/cpu/microcode/intel.c
@@ -196,6 +196,11 @@ static enum ucode_state generic_load_microcode(int cpu, void *data, size_t size,
                 struct microcode_header_intel mc_header;
                 unsigned int mc_size;
 
+                if (leftover < sizeof(mc_header)) {
+                        pr_err("error! Truncated header in microcode data file\n");
+                        break;
+                }
+
                 if (get_ucode_data(&mc_header, ucode_ptr, sizeof(mc_header)))
                         break;