prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x0, &(0x7f0000000000))
mkdir(&(0x7f0000000200)='./file1\x00', 0x0)
open_tree(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0x0)