Category Archives: Kernel

The Case of the Ever-Increasing SYSTEM Handle Count

Posted on November 26, 2025 by snowkoan

Update – Dec. 8, 2025: I got some feedback from a member of the Windows File Systems Team. They can reproduce the issue and also pointed out the leaking driver is not enabled in most cases: Wcifs only gets attached … Continue reading →

Posted in Debugging, Kernel, Leak, Process Monitor, Sysinternals Tools | Tagged , , , , | Leave a comment

Compiler:1, Filter Verifier:0 –OR– Why Your Mother Told You that Stackwalking is Dangerous

Posted on January 27, 2023 by snowkoan

Update: I reported this to the Filter Manager team at Microsoft. Of course, they already knew about it but maybe my report tipped the scales, because it is now documented on the Filter Verifier page. One of our excellent testers … Continue reading →

Posted in Debugging, Kernel, Windows | Leave a comment