mmap(&(0x7f0000000000/0x2000)=nil, 0x2000, 0x2000005, 0x32, 0xffffffffffffffff, 0x0)
r0 = getpgrp(0x0)
syz_open_procfs$namespace(r0, &(0x7f0000000580)='ns/pid_for_children\x00')