CVE-2023-53326 powerpc: Don't try to copy PPR for task with NULL pt_regs

In the Linux kernel, the following vulnerability has been resolved: powerpc: Don't try to copy PPR for task with NULL ptregs powerpc sets up PFKTHREAD and PFIOWORKER with a NULL ptregs, which from my arguably very short checking is not commonly done for other archs. This is fine, except when...

DEBIAN-CVE-2023-32570

VideoLAN dav1d before 1.2.0 has a threadtask.c race condition that can lead to an application crash, related to dav1ddecodeframeexit...