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Peter Wu changed bug 10957

What	Removed	Added
Status	UNCONFIRMED	CONFIRMED
CC		peter@lekensteyn.nl
Ever confirmed		1

Comment # 1 on bug 10957 from Peter Wu

It looks like this is a regression from bug 7471.

The problem is within this part of epan/dfilter/dfilter-macro.c:

    for (i = 0; i < num_macros; i++) {
        if (m == &(macros[i])) continue;
        //  ^^^^^^^^^^^^^^^^^

        if ( g_str_equal(m->name,macros[i].name) ) {
            *error = g_strdup_printf("macro '%s' exists already", m->name);
            m->usable = FALSE;
            return;
        }
    }

The "m" parameter refers to an internal data pointer (UAT_INDEX_PTR) while the
macros are referenced by UAT_USER_INDEX_PTR. There is also an invalid memory
access when a UAT contains "invalid" memory access.

Investigating further...

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