r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f00000002c0), 0x0, 0x0)
r1 = syz_open_dev$sg(&(0x7f0000000000), 0x0, 0x0)
r2 = dup2(r1, r0)
ioctl$SG_GET_PACK_ID(r2, 0x541b, 0x0)