AZL-62821

In the Linux kernel, the following vulnerability has been resolved:

accel/ivpu: Fix locking order in ivpujobsubmit

Fix deadlock in job submission and abort handling. When a thread aborts currently executing jobs due to a fault, it first locks the global lock protecting submitted_jobs (#1).

After the last job is destroyed, it proceeds to release the related context and locks filepriv (#2). Meanwhile, in the job submission thread, the filepriv lock (#2) is taken first, and then the submitted_jobs lock (#1) is obtained when a job is added to the submitted jobs list.

   CPU0                            CPU1
   ----                            ----

(for example due to a fault) (jobs submissions keep coming)

lock(&vdev->submittedjobslock) #1 ivpujobsabortall() jobdestroy() lock(&filepriv->lock) #2 lock(&vdev->submittedjobslock) #1 fileprivrelease() lock(&vdev->contextlistlock) lock(&filepriv->lock) #2

This order of locking causes a deadlock. To resolve this issue, change the order of locking in ivpujobsubmit().