linux-kernel - [PATCH 0/4] livepatch/samples/selftest: Clean up show variables handling

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Date:   Thu, 16 Jan 2020 16:31:41 +0100
From:   Petr Mladek <pmladek@...e.com>
To:     Jiri Kosina <jikos@...nel.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Miroslav Benes <mbenes@...e.cz>
Cc:     Joe Lawrence <joe.lawrence@...hat.com>,
        Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>,
        Nicolai Stange <nstange@...e.de>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        live-patching@...r.kernel.org, linux-kernel@...r.kernel.org,
        Petr Mladek <pmladek@...e.com>
Subject: [PATCH 0/4] livepatch/samples/selftest: Clean up show variables handling

Dan Carpenter reported suspicious allocations of shadow variables
in the sample module, see
https://lkml.kernel.org/r/20200107132929.ficffmrm5ntpzcqa@kili.mountain

The code did not cause a real problem. But it was indeed misleading
and semantically wrong. I got confused several times when cleaning it.
So I decided to split the change into few steps. I hope that
it will help reviewers and future readers.

The changes of the sample module are basically the same as in the RFC.
In addition, there is a clean up of the module used by the selftest.


Petr Mladek (4):
  livepatch/sample: Use the right type for the leaking data pointer
  livepatch/selftest: Clean up shadow variable names and type
  livepatch/samples/selftest: Use klp_shadow_alloc() API correctly
  livepatch: Handle allocation failure in the sample of shadow variable
    API

 lib/livepatch/test_klp_shadow_vars.c      | 119 +++++++++++++++++-------------
 samples/livepatch/livepatch-shadow-fix1.c |  39 ++++++----
 samples/livepatch/livepatch-shadow-fix2.c |   4 +-
 samples/livepatch/livepatch-shadow-mod.c  |   4 +-
 4 files changed, 99 insertions(+), 67 deletions(-)

-- 
2.16.4