On Wed, Aug 07, 2019 at 12:44:40PM +0530, Balamuruhan S wrote:
> +void python_args_init_cast_int(char *args[], int arg, int pos)
> +{
> + args[pos]= malloc(sizeof(int));
> + sprintf(args[pos], "%d", arg);
> +}
This is broken. args[pos] is a (possibly NULL) pointer to 4 bytes.
sprintf() will buffer overflow if arg has more than 3 digits.
A correct way to do this is:
args[pos] = g_strdup_printf("%d", arg);
> +void python_args_init_cast_long(char *args[], uint64_t arg, int pos)
> +{
> + args[pos]= g_malloc(sizeof(uint64_t) * 2);
> + sprintf(args[pos], "%lx", arg);
> +}
Same issue.
> +void python_args_clean(char *args[], int nargs)
> +{
> + for (int i = 0; i < nargs; i++) {
> + g_free(args[i]);
> + }
> +}
Mixing malloc() and g_free() is unsafe. If you switch to
g_strdup_printf() then g_free() is correct.
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