r0 = syz_open_procfs(0xffffffffffffffff, &(0x7f0000000040)='mountinfo\x00')
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000000)={0xffffffffffffffff, <r1=>0xffffffffffffffff})
sendfile(r1, r0, 0x0, 0x10001)