From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <glibc-bugs-return-25981-listarch-glibc-bugs=sources.redhat.com@sourceware.org>
Received: (qmail 2023 invoked by alias); 15 Aug 2014 03:52:56 -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 1926 invoked by uid 48); 15 Aug 2014 03:52:46 -0000
From: "naszar at ya dot ru" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/17273] New: getmntent() returns wrong default value for fs_passno
Date: Fri, 15 Aug 2014 03:52:00 -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: unspecified
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: naszar at ya dot ru
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-17273-131@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: 2014-08/txt/msg00064.txt.bz2

https://sourceware.org/bugzilla/show_bug.cgi?id=17273

            Bug ID: 17273
           Summary: getmntent() returns wrong default value for fs_passno
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: naszar at ya dot ru
                CC: drepper.fsp at gmail dot com

Created attachment 7747
  --> https://sourceware.org/bugzilla/attachment.cgi?id=7747&action=edit
simple test program

man 5 fstab states that if the fifth field (fs_freq) and the sixth field
(fs_passno) is not present a value of zero is returned (i.q.
fs_req=0,fs_passno=0 if there is no fifth and sixth field in /etc/fstab  line).
If fourth field ends with '\n' all work fine. But if there is extra tabs or
spaces getmntent() returns garbage in ((struct mntent *) mp)->mnt_passno. It is
because in misc/mntent_r.c:__getmntent_r() at line 167 no checks that sscanf()
returns EOF or no striping for spaces and tabs like it done at line 164 for
example.
In my mashine attached test_mntent (for testtab which also attached) say:
mnt_dir=/home    mnt_freq=42    mnt_passno=666
mnt_dir=/home    mnt_freq=42    mnt_passno=666
but must:
mnt_dir=/home    mnt_freq=42    mnt_passno=666
mnt_dir=/home    mnt_freq=0    mnt_passno=0

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