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Bug#815838: linux-image-3.16.0-4-amd64: Boot randomly fails with "Initramfs unpacking failed", probably due to kaslr bug upstream



Control: severity -1 important
Control: tag -1 moreinfo

On Wed, 24 Feb 2016 17:40:58 -0500 Blake Miner <compwiz737@gmail.com> wrote:
> Package: src:linux
> Version: 3.16.7-ckt11-1+deb8u6
> Severity: critical
> Justification: breaks the whole system
> 
> Dear Maintainer,
> 
> The operating system will boot up fine in most cases, but randomly, the kernel will panic on boot-up and display
> "Initramfs unpacking failed: uncompression error"

Is your processor overclocked?  Have you run a RAM test (e.g.. memtest86+)?

> I am running this kernel (I know that it's not quite up-to-date):
> 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt11-1+deb8u6 (2015-11-09) x86_64 GNU/Linux

Please re-test with the current kernel version.

> I believe that this problem is caused by a bug already fixed upstream by the Linux Kernel team but not yet
> fixed in the Debian 3.16 kernel.
> 
> Please check out commit 664653016626d15d3e898aabd0785f1b785f6400
> https://github.com/torvalds/linux/commit/664653016626d15d3e898aabd0785f1b785f6400
> 
> An excerpt of the commit message is as follows:
> 
> ---
> x86, kaslr: Prevent .bss from overlaping initrd"
[...]

We don't build with kaslr, so this doesn't explain the problem.

Ben.

-- 
Ben Hutchings
When in doubt, use brute force. - Ken Thompson

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