In a weekly debug session that left more questions than answers, we discovered a critical issue where two threads were entering the same block of code due to a failure in handling the critical section. Despite initial confusion in the crash dump analysis, we uncovered that the critical section was being reinitialized every time a thread entered, causing the issue. The root cause was a misunderstanding of return values in the DDK, leading to improper handling of the initialization function. A simple fix involves using an SRWLOCK instead of a critical section to prevent multiple thread entries. This unique exploration highlights the importance of understanding return value conventions to avoid similar bugs in the future.
https://devblogs.microsoft.com/oldnewthing/20250321-00/?p=110984