media: venus: fix use after free bug in venus_remove due to race condition
Commit Message
in venus_probe, core->work is bound with venus_sys_error_handler, which is
used to handle error. The code use core->sys_err_done to make sync work.
The core->work is started in venus_event_notify.
If we call venus_remove, there might be a unfished work. The core->lock may
be destroyed in venus_remove and used in venus_sys_error_handler.
Fix it by canceling the work first in venus_remove.
Signed-off-by: Zheng Wang <zyytlz.wz@163.com>
---
drivers/media/platform/qcom/venus/core.c | 1 +
1 file changed, 1 insertion(+)
@@ -423,6 +423,7 @@ static int venus_remove(struct platform_device *pdev)
struct device *dev = core->dev;
int ret;
+ cancel_delayed_work(&core->work);
ret = pm_runtime_get_sync(dev);
WARN_ON(ret < 0);