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



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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