In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: fix list corruption from reorder of WRITE ->lqueued _blkcgrstatflush() can be run anytime, especially when blkcgroupbiostart is being executed. If WRITE of ->lqueued
is re-ordered with READ of 'bisc->lnode.next' in the loop of _blkcgrstatflush(), next_bisc
can be assigned with one stat instance being added in blkcgroupbiostart(), then the local list in _blkcgrstat_flush() could be corrupted. Fix the issue by adding one barrier.