snmp_set_var_value function question

Hi,

I run snmpd on uClinux. Sometimes it crashes. I have found a place, where this problem has occured.

In snmp_set_var_value function (snmp_client.c)
..........................

 /*
     * xxx-rks: why the unconditional free? why not use existing
     * memory, if len < vars->val_len ?
     */
    if (vars->val.string && vars->val.string != vars->buf) {
        free(vars->val.string);
    }

Sometimes snmpd tries to free allocated memory here, which was not allocated. 

It is not clear for me why it happened and why this condition (vars->val.string && vars->val.string != vars->buf)
is true.

thank you,
Andrey

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