[PATCH] qconf: fix SIGSEGV on empty menu items

[PATCH] qconf: fix SIGSEGV on empty menu items

[Cyrill V. Gorcunov]

qconf may cause SIGSEGV by trying to show debug
information on empty menu items

Signed-off-by: Cyrill V. Gorcunov <gorcunov@gmail.com>
---
diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index 0b2fcc4..0694d1d 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -925,6 +925,8 @@ ConfigInfoView::ConfigInfoView(QWidget* parent, const char *name)
                configSettings->endGroup();
                connect(configApp, SIGNAL(aboutToQuit()), SLOT(saveSettings()));
        }
+
+       has_dbg_info = 0;
 }
 
 void ConfigInfoView::saveSettings(void)
@@ -953,10 +955,13 @@ void ConfigInfoView::setInfo(struct menu *m)
        if (menu == m)
                return;
        menu = m;
-       if (!menu)
+       if (!menu) {
+               has_dbg_info = 0;
                clear();
-       else
+       } else {
+               has_dbg_info = 1;
                menuInfo();
+       }
 }
 
 void ConfigInfoView::setSource(const QString& name)
@@ -991,6 +996,9 @@ void ConfigInfoView::symbolInfo(void)
 {
        QString str;
 
+       if (!has_dbg_info)
+               return;
+
        str += "<big>Symbol: <b>";
        str += print_filter(sym->name);
        str += "</b></big><br><br>value: ";
diff --git a/scripts/kconfig/qconf.h b/scripts/kconfig/qconf.h
index 6fc1c5f..a397edb 100644
--- a/scripts/kconfig/qconf.h
+++ b/scripts/kconfig/qconf.h
@@ -273,6 +273,8 @@ protected:
        struct symbol *sym;
        struct menu *menu;
        bool _showDebug;
+
+       int has_dbg_info;
 };
 
 class ConfigSearchWindow : public QDialog {

Re: [PATCH] qconf: fix SIGSEGV on empty menu items

[Roman Zippel]

Hi,

On Thu, 4 Jan 2007, Cyrill V. Gorcunov wrote:

> qconf may cause SIGSEGV by trying to show debug
> information on empty menu items

Thanks, but this is more complex than necessary.
It simply lacks some initializers.

bye, Roman

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>

---
Index: linux-2.6/scripts/kconfig/qconf.cc
===================================================================
--- linux-2.6.orig/scripts/kconfig/qconf.cc	2007-01-05 01:47:54.000000000 +0100
+++ linux-2.6/scripts/kconfig/qconf.cc	2007-01-05 01:56:54.000000000 +0100
@@ -915,7 +915,7 @@ void ConfigView::updateListAll(void)
 }
 
 ConfigInfoView::ConfigInfoView(QWidget* parent, const char *name)
-	: Parent(parent, name), menu(0)
+	: Parent(parent, name), menu(0), sym(0)
 {
 	if (name) {
 		configSettings->beginGroup(name);
@@ -951,6 +951,7 @@ void ConfigInfoView::setInfo(struct menu
 	if (menu == m)
 		return;
 	menu = m;
+	sym = NULL;
 	if (!menu)
 		clear();
 	else

Re: [PATCH] qconf: fix SIGSEGV on empty menu items

[Bauke Jan Douma]

Roman Zippel wrote on 06-01-07 04:20:

<snip>

> Thanks, but this is more complex than necessary.
> It simply lacks some initializers.

<snip>

> ---
> Index: linux-2.6/scripts/kconfig/qconf.cc
> ===================================================================
> --- linux-2.6.orig/scripts/kconfig/qconf.cc	2007-01-05 01:47:54.000000000 +0100
> +++ linux-2.6/scripts/kconfig/qconf.cc	2007-01-05 01:56:54.000000000 +0100
> @@ -915,7 +915,7 @@ void ConfigView::updateListAll(void)
>  }
>  
>  ConfigInfoView::ConfigInfoView(QWidget* parent, const char *name)
> -	: Parent(parent, name), menu(0)
> +	: Parent(parent, name), menu(0), sym(0)
>  {
>  	if (name) {
>  		configSettings->beginGroup(name);
> @@ -951,6 +951,7 @@ void ConfigInfoView::setInfo(struct menu
>  	if (menu == m)
>  		return;
>  	menu = m;
> +	sym = NULL;
>  	if (!menu)
>  		clear();
>  	else
> -

I can confirm that this patch squashed the segfault.

bjd