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 75d9b24a7cb49ee64b86a2408976160cebc728aa..168ee6a59d5f8bb9822d692526730996c8e3747e 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),