Bug 1011333 - PerlIO::via leaks a foreign memory
Summary: PerlIO::via leaks a foreign memory
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: perl
Version: 39
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Jitka Plesnikova
QA Contact: Fedora Extras Quality Assurance
URL: https://rt.perl.org/rt3/Ticket/Displa...
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2013-09-24 06:24 UTC by Petr Pisar
Modified: 2024-01-17 14:23 UTC (History)
9 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed:
Type: Bug
Embargoed:


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Github Perl perl5 issues 13304 0 None open PerlIO::via modules exhibit buffer leakage when READ doesn't touch $buffer 2023-04-26 12:16:14 UTC

Description Petr Pisar 2013-09-24 06:24:04 UTC
This simple test:


#!/usr/bin/perl
use strict;
use warnings;
#use utf8;

{
  package PerlIO::via::Bug;

  sub PUSHED {
    return bless {}, $_[0];
  }
  sub READ {
    return $_[2];
  }
}

open my $fh, '<:raw:via(Bug)', '/dev/null' or die "Cannot open, $! $?";
read $fh, ( my $buf ), 1024;
print $buf;


accesses foreign data (and puts them into $buf and prints them). All perls are affected, the specific output depends on perl version and on the "use utf8" pragma. Valgrinds warns on write(2) with uninitialized memory.

Reported to upstream as <https://rt.perl.org/rt3//Public/Bug/Display.html?id=119961>.

All Fedoras are affected.

Comment 1 Fedora End Of Life 2013-12-21 14:37:06 UTC
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Comment 2 Petr Pisar 2014-01-02 15:59:57 UTC
Still issue in F19 (perl-5.16.3-266.fc19.x86_64).

Comment 3 Fedora End Of Life 2015-01-09 19:57:52 UTC
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Comment 5 Jan Kurik 2015-07-15 14:45:04 UTC
This bug appears to have been reported against 'rawhide' during the Fedora 23 development cycle.
Changing version to '23'.

(As we did not run this process for some time, it could affect also pre-Fedora 23 development
cycle bugs. We are very sorry. It will help us with cleanup during Fedora 23 End Of Life. Thank you.)

More information and reason for this action is here:
https://fedoraproject.org/wiki/BugZappers/HouseKeeping/Fedora23

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Comment 8 Petr Pisar 2017-07-26 09:09:55 UTC
perl-interpreter-5.26.0-395.fc27.x86_64 still broken.

Comment 9 Fedora End Of Life 2017-11-16 18:55:10 UTC
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Comment 10 Fedora End Of Life 2018-05-03 08:55:48 UTC
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Comment 11 Ben Cotton 2018-11-27 15:52:39 UTC
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On 2018-Nov-30  Fedora will stop maintaining and issuing updates for
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Comment 12 Jitka Plesnikova 2018-11-27 16:25:28 UTC
Still valid in F28

Comment 13 Ben Cotton 2019-05-02 20:15:14 UTC
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Although we aim to fix as many bugs as possible during every release's 
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Comment 14 Petr Pisar 2019-05-03 10:45:05 UTC
perl-5.28.1 is still broken.

Comment 15 Ben Cotton 2019-10-31 19:24:51 UTC
This message is a reminder that Fedora 29 is nearing its end of life.
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It is Fedora's policy to close all bug reports from releases that are no longer
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Although we aim to fix as many bugs as possible during every release's 
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Comment 16 Ben Cotton 2020-04-30 20:48:26 UTC
This message is a reminder that Fedora 30 is nearing its end of life.
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It is Fedora's policy to close all bug reports from releases that are no longer
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Thank you for reporting this issue and we are sorry that we were not 
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Although we aim to fix as many bugs as possible during every release's 
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Comment 17 Ben Cotton 2020-08-11 13:02:15 UTC
This bug appears to have been reported against 'rawhide' during the Fedora 33 development cycle.
Changing version to 33.

Comment 18 Ben Cotton 2021-11-04 17:25:23 UTC
This message is a reminder that Fedora 33 is nearing its end of life.
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It is Fedora's policy to close all bug reports from releases that are no longer
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Comment 19 Ben Cotton 2022-02-08 21:33:18 UTC
This bug appears to have been reported against 'rawhide' during the Fedora 36 development cycle.
Changing version to 36.

Comment 20 Ben Cotton 2023-04-25 16:37:47 UTC
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Comment 21 Jitka Plesnikova 2023-04-26 11:44:00 UTC
perl-5.36.1 is still broken.

Comment 22 Fedora Release Engineering 2023-08-16 07:03:54 UTC
This bug appears to have been reported against 'rawhide' during the Fedora Linux 39 development cycle.
Changing version to 39.


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