r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
r1 = syz_open_dev$sg(&(0x7f0000000000), 0x0, 0x0)
r2 = dup2(r1, r0)
mmap$IORING_OFF_SQ_RING(&(0x7f0000ffd000/0x3000)=nil, 0x3000, 0x0, 0xa012, r2, 0x0)