Hi,
I would not be so sure.
If value_len is exactly the size: 2
if (data[0] == '\"' && data[value_len - 1] == '\"')
{
data++;
value_len -= 2;
len -= 2;
}
So, when value_len -= 2; is executed, what is the final size?
value_len is zero and "if (*value_max_size < value_len)" fail!
Best regards,
Ranier Vilela
________________________________________
De: Antonio Scuri <antonio.sc...@gmail.com>
Enviado: terça-feira, 4 de junho de 2019 11:29
Para: IUP discussion list.
Assunto: Re: [Iup-users] CID 210668 (#1 of 1): Explicit null dereferenced
(FORWARD_NULL)
If you analyze the calling function that should never fail.
Em ter, 4 de jun de 2019 às 08:24, Ranier VF
<ranier_...@hotmail.com<mailto:ranier_...@hotmail.com>> escreveu:
Hi,
And what happens if "if (*value_max_size < value_len)" fail and
realloc is not called?
Best regards,
Ranier Vilela
________________________________________
De: Antonio Scuri <antonio.sc...@gmail.com<mailto:antonio.sc...@gmail.com>>
Enviado: terça-feira, 4 de junho de 2019 11:09
Para: IUP discussion list.
Assunto: Re: [Iup-users] CID 210668 (#1 of 1): Explicit null dereferenced
(FORWARD_NULL)
The realloc function does the malloc job. And it will only increase the size
of the value pointer when necessary.
Best,
Scuri
Em seg, 3 de jun de 2019 às 22:29, Ranier VF
<ranier_...@hotmail.com<mailto:ranier_...@hotmail.com><mailto:ranier_...@hotmail.com<mailto:ranier_...@hotmail.com>>>
escreveu:
Hi,
Sorry but can't undestand the logic.
iupmatex_clipboard.c
line 505, call function:
value = iMatrixExStrCopyData(value, &value_max_size, data, value_len);
iMatrixExStrCopyData, call memcpy with value without malloc?
static char* iMatrixExStrCopyData(char* value, int *value_max_size, const char*
data, int value_len)
{
if (*value_max_size < value_len) /* if fail, memcpy destroy memory pointer */
{
*value_max_size = value_len+10;
value = realloc(value, *value_max_size);
}
memcpy(value, data, value_len);
value[value_len] = 0;
return value;
}
Best regards,
Ranier Vilela
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