spinlock recursion

About this tag
Spinlock recursion is a kernel bug that occurs when a spinlock is acquired again by the same execution context before being released, leading to a deadlock or system crash. On WindowsForum.com, discussions cover a Linux kernel vulnerability (CVE-2024-53090) in the AFS subsystem where spinlock recursion causes a kernel oops and denial-of-service. The fix involves deferring cleanup to a workqueue to avoid re-entering the lock path. While the example is Linux-specific, spinlock recursion is a general concurrency issue relevant to kernel development and debugging across operating systems, including Windows driver development.

  1. Linux AFS Spinlock Recursion Bug CVE-2024-53090 and Workqueue Fix

    A Linux kernel bug in the AFS subsystem, tracked as CVE-2024-53090, can trigger spinlock recursion and lead to a kernel oops or full system denial-of-service; the issue stems from afs_wake_up_async_call taking a reference in a context where a subsequent put can re-enter the same lock path, and...
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    • afs subsystem linux kernel spinlock recursion workqueue fix
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    • Forum: Security Alerts