Hello Sudip Mukherjee,
The patch a517e87c3dfc: "Input: gamecon - use parallel port device
model" from Sep 29, 2015, leads to the following static checker
warning:
drivers/input/joystick/gamecon.c:988 gc_attach()
error: buffer overflow 'gc_base' 3 <= 5
drivers/input/joystick/gamecon.c
972
973 for (i = 0; i < n_pads && i < GC_MAX_DEVICES; i++) {
^^^^^^^^^^^^^^
Should this be GC_MAX_PORTS?
974 if (!pads[i])
975 continue;
976
977 if (gc_setup_pad(gc, i, pads[i]))
978 goto err_unreg_devs;
979
980 count++;
981 }
982
983 if (count == 0) {
984 pr_err("No valid devices specified\n");
985 goto err_free_gc;
986 }
987
988 gc_base[i] = gc;
^^^^^^^^^^
It's saying this is out of bounds.
Even if we change GC_MAX_DEVICES to GC_MAX_PORTS it will still complain
because we are relying on n_pads to be less than GC_MAX_DEVICES. I
guess we could change the other condition to be:
if (count == 0 || i == GC_MAX_PORTS)
goto err_free_gc;
989 return;
990
regards,
dan carpenter
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