1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
index c17e75348a99..a700f8f9ead7 100644
--- a/drivers/char/tpm/tpm2-cmd.c
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -683,6 +683,10 @@ static int tpm2_unseal_cmd(struct tpm_chip *chip,
         if (!rc) {
                 data_len = be16_to_cpup(
                         (__be16 *) &buf.data[TPM_HEADER_SIZE + 4]);
+                if (data_len < MIN_KEY_SIZE ||  data_len > MAX_KEY_SIZE + 1) {
+                        rc = -EFAULT;
+                        goto out;
+                }
 
                 rlength = be32_to_cpu(((struct tpm2_cmd *)&buf)
                                         ->header.out.length);