CVE-2024-26602

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CVE-2024-26602

Summary: sched/membarrier: reduce the ability to hammer on sys_membarrier

Details: In the Linux kernel, the following vulnerability has been resolved: sched/membarrier: reduce the ability to hammer on sys_membarrier On some systems, sys_membarrier can be very expensive, causing overall slowdowns for everything. So put a lock on the path in order to serialize the accesses to prevent the ability for this to be called at too high of a frequency and saturate the machine.

References: https://git.kernel.org/stable/c/2441a64070b85c14eecc3728cc87e883f953f265, https://git.kernel.org/stable/c/24ec7504a08a67247fbe798d1de995208a8c128a, https://git.kernel.org/stable/c/3cd139875e9a7688b3fc715264032620812a5fa3, https://git.kernel.org/stable/c/50fb4e17df319bb33be6f14e2a856950c1577dee, https://git.kernel.org/stable/c/944d5fe50f3f03daacfea16300e656a1691c4a23, https://git.kernel.org/stable/c/b6a2a9cbb67545c825ec95f06adb7ff300a2ad71, https://git.kernel.org/stable/c/c5b2063c65d05e79fad8029324581d86cfba7eea, https://git.kernel.org/stable/c/db896bbe4a9c67cee377e5f6a743350d3ae4acf6, https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html, https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html, https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26602.json, https://nvd.nist.gov/vuln/detail/CVE-2024-26602, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git