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

Eric W. Biederman ebiederm at xmission.com
Wed Sep 7 07:19:40 PDT 2016

ebiederm at xmission.com (Eric W. Biederman) writes:

> 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>

To be constructive the way we have handled similiar situations in the
past (hotplu memory) is to call kexec_load again.


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