r0 = creat(&(0x7f0000000040)='./cgroup/cgroup.procs\x00', 0x0)
open_by_handle_at(0xffffffffffffffff, 0x0, 0x0)
write$P9_RREAD(r0, &(0x7f0000000000)=ANY=[@ANYBLOB='7'], 0x37)
openat$procfs(0xffffffffffffff9c, 0x0, 0x0, 0x0)