On Thu, 2024-06-27 at 15:31 +0900, Joe Hattori wrote:
> In tpm_bios_measurements_open(), get_device() is called on the device
> embedded in struct tpm_chip. In the error path, however, put_device() is
> not called. This results in a reference count leak, which prevents the
> device from being properly released. This commit makes sure to call
> put_device() when the seq_open() call fails.
>
> Fixes: 9b01b5356629 ("tpm: Move shared eventlog functions to common.c")
> Signed-off-by: Joe Hattori <[email protected]>
> ---
> Changes since v1:
> - Keep the code diff minimal.
> - Fix the commit message.
> - Add a Fixes tag.
> ---
> drivers/char/tpm/eventlog/common.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/char/tpm/eventlog/common.c
> b/drivers/char/tpm/eventlog/common.c
> index 639c3f395a5a..4c0bbba64ee5 100644
> --- a/drivers/char/tpm/eventlog/common.c
> +++ b/drivers/char/tpm/eventlog/common.c
> @@ -47,6 +47,8 @@ static int tpm_bios_measurements_open(struct inode *inode,
> if (!err) {
> seq = file->private_data;
> seq->private = chip;
> + } else {
> + put_device(&chip->dev);
> }
>
> return err;
Thank you. I applied this.
BR, Jarkko
