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staging: bcm2835-camera: add check to avoid null pointer dereference 

This patch adds checks after memory allocation to avoid possible null
pointer dereferences.

Signed-off-by: Aishwarya Pant <aishpant@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Aishwarya Pant 2017-03-10 00:30:58 +05:30 committed by Greg Kroah-Hartman
parent fcd1f55359
commit a1d76d7a3c
1 changed files with 8 additions and 2 deletions
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10
drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.c
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@ -260,8 +260,11 @@ get_msg_context(struct vchiq_mmal_instance *instance)
/* todo: should this be allocated from a pool to avoid kmalloc */
msg_context = kmalloc(sizeof(*msg_context), GFP_KERNEL);
memset(msg_context, 0, sizeof(*msg_context));
if (!msg_context)
return NULL;
memset(msg_context, 0, sizeof(*msg_context));
msg_context->instance = instance;
msg_context->handle =
mmal_context_map_create_handle(&instance->context_map,
@ -2015,8 +2018,11 @@ int vchiq_mmal_init(struct vchiq_mmal_instance **out_instance)
}
instance = kmalloc(sizeof(*instance), GFP_KERNEL);
memset(instance, 0, sizeof(*instance));
if (!instance)
return -ENOMEM;
memset(instance, 0, sizeof(*instance));
mutex_init(&instance->vchiq_mutex);
mutex_init(&instance->bulk_mutex);