1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index caf8012ef47c..1fe979335835 100644
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -383,6 +383,9 @@ static ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
         u32 count, ordinal;
         unsigned long stop;
 
+        if (bufsiz > TPM_BUFSIZE)
+                bufsiz = TPM_BUFSIZE;
+
         count = be32_to_cpu(*((__be32 *) (buf + 2)));
         ordinal = be32_to_cpu(*((__be32 *) (buf + 6)));
         if (count == 0)