tree b8ee839d3628fe222f73828ec3a7b88ed05a2f4b
parent 32498b8889c8d1f9b2b67f4e43e017c63359b03e
author Dan Carpenter <dan.carpenter@oracle.com> 1631079237 +0300
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1637240618 +0100

tpm: Check for integer overflow in tpm2_map_response_body()

commit a0bcce2b2a169e10eb265c8f0ebdd5ae4c875670 upstream.

The "4 * be32_to_cpu(data->count)" multiplication can potentially
overflow which would lead to memory corruption.  Add a check for that.

Cc: stable@vger.kernel.org
Fixes: 745b361e989a ("tpm: infrastructure for TPM spaces")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>