From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <glibc-bugs-return-26788-listarch-glibc-bugs=sources.redhat.com@sourceware.org>
Received: (qmail 23001 invoked by alias); 3 Dec 2014 15:13:43 -0000
Mailing-List: contact glibc-bugs-help@sourceware.org; run by ezmlm
Precedence: bulk
List-Id: <glibc-bugs.sourceware.org>
List-Subscribe: <mailto:glibc-bugs-subscribe@sourceware.org>
List-Post: <mailto:glibc-bugs@sourceware.org>
List-Help: <mailto:glibc-bugs-help@sourceware.org>, <http://sourceware.org/lists.html#faqs>
Sender: glibc-bugs-owner@sourceware.org
Received: (qmail 22956 invoked by uid 48); 3 Dec 2014 15:13:39 -0000
From: "bhaak at gmx dot net" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/17674] New: ctype functions with wrong return values and crashes
Date: Wed, 03 Dec 2014 15:13:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: glibc
X-Bugzilla-Component: libc
X-Bugzilla-Version: 2.20
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: bhaak at gmx dot net
X-Bugzilla-Status: NEW
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at sourceware dot org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter cc attachments.created
Message-ID: <bug-17674-131@http.sourceware.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://sourceware.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2014-12/txt/msg00031.txt.bz2

https://sourceware.org/bugzilla/show_bug.cgi?id=17674

            Bug ID: 17674
           Summary: ctype functions with wrong return values and crashes
           Product: glibc
           Version: 2.20
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: bhaak at gmx dot net
                CC: drepper.fsp at gmail dot com

Created attachment 7992
  --> https://sourceware.org/bugzilla/attachment.cgi?id=7992&action=edit
C code demonstrating wrong return values and crash of isblank

The ctype functions (probably all, I tested with isblank, isspace, and isalpha)
return wrong results if they are called with int values bigger than UCHAR_MAX.

Furthermore, for some big int values it crashes with a segmentation fault.

The attached C file outputs all values from 0 to INT_MAX which return true from
isblank. On a Gentoo machine it crashed with 151056, on an Ubuntu machine with
163152.

I know that the ctype functions are technically in POSIX only defined for
values representable as an unsigned char or the value of EOF but this is stupid
nevertheless for a library function.

-- 
You are receiving this mail because:
You are on the CC list for the bug.