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

A flaw was found in sysmembarrier in the Linux kernel in sched/membarrier in how a user calls it at too high of a frequency. This flaw allows a local user to saturate the machine...

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

A flaw was found in sysmembarrier in the Linux kernel in sched/membarrier in how a user calls it at too high of a frequency. This flaw allows a local user to saturate the machine...

UBUNTU-CVE-2024-26602

In the Linux kernel, the following vulnerability has been resolved: sched/membarrier: reduce the ability to hammer on sysmembarrier On some systems, sysmembarrier can be very expensive, causing overall slowdowns for everything. So put a lock on the path in order to serialize the accesses to preve...