Debian Bug report logs - #816154
initramfs-tools-core: lsinitramfs causes zcat crash when Intel microcode is included in initrd

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Ron Murray <rjmx@rjmx.net>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: initramfs-tools-core: lsinitramfs causes zcat crash when Intel microcode is included in initrd

Date: Thu, 25 Feb 2016 11:51:06 -0500

Package: initramfs-tools-core
Version: 0.123
Severity: normal

Dear Maintainer,

When using lsinitramfs to check the contents of an initrd:

> root:~# lsinitramfs /boot/initrd.img-4.4.2
> /boot/initrd.img-4.4.2-curly-0
> kernel
> kernel/x86
> kernel/x86/microcode
> kernel/x86/microcode/GenuineIntel.bin
> *** Error in `zcat': double free or corruption (!prev): 0x0000000002236940 ***

lsinitramfs runs fine on my AMD boxes.

It seems that Ubuntu has at least two reports of this: see their bug
numberss 1541076 and 1507443. I don't see a Debian bug report on it, though.

-- System Information:
Debian Release: stretch/sid
  APT prefers testing-updates
  APT policy: (500, 'testing-updates'), (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 4.4.2-curly-0 (SMP w/8 CPU cores; PREEMPT)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages initramfs-tools-core depends on:
ii  cpio         2.11+dfsg-5
ii  klibc-utils  2.0.4-8
ii  kmod         22-1
ii  udev         228-6

Versions of packages initramfs-tools-core recommends:
ii  busybox  1:1.22.0-18

Versions of packages initramfs-tools-core suggests:
pn  bash-completion  <none>

-- Configuration Files:
/etc/initramfs-tools/initramfs.conf changed:
MODULES=most
BUSYBOX=y
KEYMAP=n
COMPRESS=gzip
DEVICE=
NFSROOT=auto


-- no debconf information

Message #10 received at 815915@bugs.debian.org (full text, mbox, reply):

From: Ben Hutchings <ben@decadent.org.uk>

To: Ron Murray <rjmx@rjmx.net>, 815915@bugs.debian.org

Subject: Re: Bug#815915: initramfs-tools-core: lsinitramfs causes zcat crash when Intel microcode is included in initrd

Date: Sat, 27 Feb 2016 20:09:47 +0000

[Message part 1 (text/plain, inline)]

Control: severity -1 important
Control: clone -1 -2
Control: reassign -2 gzip
Control: tag -2 security

On Thu, 2016-02-25 at 11:51 -0500, Ron Murray wrote:
> Package: initramfs-tools-core
> Version: 0.123
> Severity: normal
> 
> Dear Maintainer,
> 
> When using lsinitramfs to check the contents of an initrd:
> 
> > root:~# lsinitramfs /boot/initrd.img-4.4.2
> > /boot/initrd.img-4.4.2-curly-0
> > kernel
> > kernel/x86
> > kernel/x86/microcode
> > kernel/x86/microcode/GenuineIntel.bin
> > *** Error in `zcat': double free or corruption (!prev): 0x0000000002236940 ***
> 
> lsinitramfs runs fine on my AMD boxes.
> 
> It seems that Ubuntu has at least two reports of this: see their bug
> numberss 1541076 and 1507443. I don't see a Debian bug report on it, though.

The crash is a bug in zcat.  But presumably we are also not invoking it
correctly.

Ben.

-- 
Ben Hutchings
Every program is either trivial or else contains at least one bug

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Message #25 received at 816154-done@bugs.debian.org (full text, mbox, reply):

From: Bdale Garbee <bdale@gag.com>

To: 816154-done@bugs.debian.org

Subject: can't reproduce

Date: Sat, 28 Jul 2018 20:48:33 -0600 (MDT)

This but cannot be reproduced with current gzip.  In fact, after trying
various combinations, it seems likely the original problem was actually 
due to zutils being installed and delivering an unconditional override of
the zcat in gzip with a buggy executable.  See Debian bug #902936 for more
details.

I'm closing this bug with no further action taken.

Bdale

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