r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./cgroup/cgroup.procs\x00', 0x0, 0x0)
read(r0, &(0x7f0000000080)=""/1, 0x1)
preadv(r0, &(0x7f00000004c0)=[{&(0x7f0000000340)=""/46, 0x2e}], 0x1, 0x0, 0x0)