Bug 18856 – gtk_clist_get_text() causes segfault

Bug 18856 - gtk_clist_get_text() causes segfault

Summary:	gtk_clist_get_text() causes segfault

Status:	CLOSED NOTABUG

Aliases:	None

Product:	Red Hat Linux
Classification:	Retired
Component:	gtk+ (Show other bugs)
Sub Component:
Version:	7.0
Hardware:	i386 Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Owen Taylor
QA Contact:	Dale Lovelace
Docs Contact:

URL:
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Depends On:
Blocks:
	Show dependency tree / graph

Reported:	2000-10-10 18:03 EDT by Sean Dilda
Modified:	2007-04-18 12:29 EDT (History)
CC List:	1 user (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2000-10-16 11:20:49 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:

Attachments	(Terms of Use)
This is the sample code that will work in RH62, but not RH70 (462 bytes, text/plain) 2000-10-10 18:04 EDT, Sean Dilda	no flags	Details
Add an attachment (proposed patch, testcase, etc.)

Groups: None (edit)

Description Sean Dilda 2000-10-10 18:03:36 EDT

I have sample code that works fine on Red Hat 6.2, but when compiled and
run on a Red Hat 7.0 box, the program segfaults in gtk_clist_get_text()
As far as I can tell, all my code for this is valid.

Comment 1 Sean Dilda 2000-10-10 18:04:41 EDT

Created attachment 4004 [details]
This is the sample code that will work in RH62, but not RH70

Comment 2 Owen Taylor 2000-10-16 11:36:32 EDT

  gchar **celltext;

  [...]

  gtk_clist_get_text(GTK_CLIST(clist), row, 0, celltext);

You are telling GTK+ to store the text in the location pointed
to by celltext, but celltext is unitialized, so you are telling
GTK+ to store it in random memory. If it worked with 6.2
it was complete and utter coincidence.

Try:

  gchar *celltext;

  gtk_clist_get_text(GTK_CLIST(clist), row, 0, &celltext);

To avoid problems like this, you should

 * Compile with -Wall
 * Believe the warnings
 * Read up a bit on pointers

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