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Change History

In the Linux kernel, the following vulnerability has been resolved:

perf/aux: Fix AUX buffer serialization

Ole reported that event->mmap_mutex is strictly insufficient to
serialize the AUX buffer, add a per RB mutex to fully serialize it.

Note that in the lock order comment the perf_event::mmap_mutex order
was already wrong, that is, it nesting under mmap_lock is not new with
this patch.

kernel.org https://git.kernel.org/stable/c/2ab9d830262c132ab5db2f571003d80850d56b2a [No types assigned]

kernel.org https://git.kernel.org/stable/c/52d13d224fdf1299c8b642807fa1ea14d693f5ff [No types assigned]

kernel.org https://git.kernel.org/stable/c/7882923f1cb88dc1a17f2bf0c81b1fc80d44db82 [No types assigned]

kernel.org https://git.kernel.org/stable/c/9dc7ad2b67772cfb94ceb3b0c9c4023c2463215d [No types assigned]

kernel.org https://git.kernel.org/stable/c/b9b6882e243b653d379abbeaa64a500182aba370 [No types assigned]

kernel.org https://git.kernel.org/stable/c/c4b69bee3f4ef76809288fe6827bc14d4ae788ef [No types assigned]