r0 = openat$bsg(0xffffffffffffff9c, &(0x7f0000000140), 0x0, 0x0)
openat$cgroup_ro(r0, &(0x7f00000005c0)='blkio.bfq.idle_time\x00', 0x0, 0x0)
sendmsg$unix(0xffffffffffffffff, 0x0, 0x0)