kernel: mm: slub: avoid wake up kswapd in set_track_prepare

A deadlock lock recursion vulnerability exists in the linux kernel such that when CONFIGDEBUGOBJECTSTIMERS is set, may wake up kswapd in settrackprepare, and try to hold the percpuhrtimerbases lock...

CVE-2025-39843: Improper Locking

In the Linux kernel, the following vulnerability has been resolved: mm: slub: avoid wake up kswapd in settrackprepare settrackprepare can incur lock recursion. The issue is that it is called from hrtimerstartrangens holding the percpuhrtimerbasesn.lock, but when enabled CONFIGDEBUGOBJECTSTIMERS,...