staging: vc04_services: fix information leak in create_component()

commit f37e76abd614b68987abc8e5c22d986013349771 upstream.

The m.u.component_create.pid field is for debugging and in the mainline
kernel it's not used anything.  However, it still needs to be set to
something to prevent disclosing uninitialized stack data.  Set it to
zero.

Fixes: 7b3ad5abf027 ("staging: Import the BCM2835 MMAL-based V4L2 camera driver.")
Cc: stable <stable@kernel.org>
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/2d972847-9ebd-481b-b6f9-af390f5aabd3@moroto.mountain
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
index affeaa83189ea5de1bb31157957692b7643a715c..3306ec5bb291b065eefd6f1e507ac6c72c781213 100644 (file)
--- a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
+++ b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
@@ -942,6 +942,7 @@ static int create_component(struct vchiq_mmal_instance *instance,
        m.u.component_create.client_component = component->client_component;
        strscpy_pad(m.u.component_create.name, name,
                    sizeof(m.u.component_create.name));
+       m.u.component_create.pid = 0;
 
        ret = send_synchronous_mmal_msg(instance, &m,
                                        sizeof(m.u.component_create),