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Diffstat (limited to 'drivers/char/tpm/tpm2-cmd.c')
-rw-r--r--drivers/char/tpm/tpm2-cmd.c4
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);