r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000000)='/proc/keys\x00', 0x0, 0x0)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
sendfile(r1, r0, 0x0, 0x100000001)