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From: Petr Mladek <pmladek@suse.com>
To: Jiri Kosina <jikos@kernel.org>,
	Josh Poimboeuf <jpoimboe@redhat.com>,
	Miroslav Benes <mbenes@suse.cz>
Cc: Joe Lawrence <joe.lawrence@redhat.com>,
	Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>,
	Nicolai Stange <nstange@suse.de>,
	Dan Carpenter <dan.carpenter@oracle.com>,
	live-patching@vger.kernel.org, linux-kernel@vger.kernel.org,
	Petr Mladek <pmladek@suse.com>
Subject: [PATCH 0/4] livepatch/samples/selftest: Clean up show variables handling
Date: Thu, 16 Jan 2020 16:31:41 +0100
Message-ID: <20200116153145.2392-1-pmladek@suse.com> (raw)

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


             reply index

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-16 15:31 Petr Mladek [this message]
2020-01-16 15:31 ` [PATCH 1/4] livepatch/sample: Use the right type for the leaking data pointer Petr Mladek
2020-01-16 15:31 ` [PATCH 2/4] livepatch/selftest: Clean up shadow variable names and type Petr Mladek
2020-01-16 15:31 ` [PATCH 3/4] livepatch/samples/selftest: Use klp_shadow_alloc() API correctly Petr Mladek
2020-01-16 15:31 ` [PATCH 4/4] livepatch: Handle allocation failure in the sample of shadow variable API Petr Mladek
2020-01-16 19:29 ` [PATCH 0/4] livepatch/samples/selftest: Clean up show variables handling Joe Lawrence
2020-01-17  8:26 ` Miroslav Benes
2020-01-17  9:41 ` Kamalesh Babulal
2020-01-17 10:13 ` Jiri Kosina

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