r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
r1 = syz_open_procfs(0x0, &(0x7f0000000100)='fdinfo/3\x00')
r2 = dup3(r0, r1, 0x0)
ioctl$TIOCSTI(r2, 0x5412, &(0x7f0000000000))
readv(r1, &(0x7f0000000280)=[{&(0x7f00000004c0)=""/4089, 0xff9}], 0x1)