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Bug 476840 - Invocation of the interface "g_utf8_strreverse" crashes for certain input values
Invocation of the interface "g_utf8_strreverse" crashes for certain input values
Product: glib
Classification: Platform
Component: general
Other Linux
: Normal critical
: ---
Assigned To: gtkdev
Depends on:
Reported: 2007-09-14 09:16 UTC by Areg Beketovski
Modified: 2007-09-14 13:31 UTC
See Also:
GNOME target: ---
GNOME version: ---

Proposed patch, fixing the problem (261 bytes, patch)
2007-09-14 09:58 UTC, Areg Beketovski
none Details | Review

Description Areg Beketovski 2007-09-14 09:16:41 UTC
Steps to reproduce:
1. Invocation of the interface g_utf8_strreverse with 0<len<sizeof(str)-1 results in corruption of memory, due to incorrect while() loop condition.

2. Sample program

#include <glib-2.0/glib.h>

int main()
    gchar str[] = "Internet";
    gchar* retValue = g_utf8_strreverse(str,5);
    return 0;

Stack trace:
  • #0 raise
    from /lib64/
  • #1 abort
    from /lib64/
  • #2 __libc_message
    from /lib64/
  • #3 malloc_printerr
    from /lib64/
  • #4 free
    from /lib64/
  • #5 main

Other information:
The detailed bug description can be found at:
Comment 1 Areg Beketovski 2007-09-14 09:58:12 UTC
Created attachment 95581 [details] [review]
Proposed patch, fixing the problem
Comment 2 Tim Janik 2007-09-14 13:31:58 UTC
(In reply to comment #1)
> Created an attachment (id=95581) [edit]
> Proposed patch, fixing the problem

thanks, please use diff -up next time and try to match the coding style (spaces around operators. fixed with a similar patch now:

2007-09-14 15:07:28  Tim Janik  <>

        * glib/gutf8.c (g_utf8_strreverse): applied fix for bug #476840.

        * tests/utf8-pointer.c (test_misc): added test for g_utf8_strreverse().