[PATCH v4 0/5] kexec_file: Add buffer hand-over for the next kernel

Eric W. Biederman ebiederm at xmission.com
Wed Sep 7 06:51:24 PDT 2016

Thiago Jung Bauermann <bauerman at linux.vnet.ibm.com> writes:

> Hello,
> The purpose of this new version of the series is to fix a small issue that
> I found, which is that the kernel doesn't remove the memory reservation
> for the hand-over buffer it received from the previous kernel in the
> device tree it sets up for the next kernel. The result is that for each
> successive kexec, a stale hand-over buffer is left behind, wasting memory.
> This is fixed by changes to kexec_free_handover_buffer and
> setup_handover_buffer in patch 2. The other change is to fix checkpatch
> warnings in the last patch.

This is fundamentally broken.  You do not increase the integrity of a
system by dropping integrity checks.

No. No. No. No.

Nacked-by: "Eric W. Biederman" <ebiederm at xmission.com>


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