r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x1, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x46e2, 0x0)
ftruncate(r1, 0x1000003)
sendfile(r0, r1, 0x0, 0x309d062f)