CVE-2024-50140 sched/core: Disable page allocation in task_tick_mm_cid()

In the Linux kernel, the following vulnerability has been resolved: sched/core: Disable page allocation in tasktickmmcid With KASAN and PREEMPTRT enabled, calling taskworkadd in tasktickmmcid may cause the following splat. 63.696416 BUG: sleeping function called from invalid context at...

CVE-2024-50140

CVE-2024-50140 involves a Linux kernel vulnerability in sched/core where page allocation is disabled during task_tick_mm_cid(). With KASAN and PREEMPT_RT enabled, a call to task_work_add() within task_tick_mm_cid() can sleep in an invalid context, triggering a BUG in stack/depot and related alloc...