user/sven/linux.git/lib/livepatch, branch v5.5

livepatch: Selftests of the API for tracking system state changes

2019-11-01T12:08:29Z

Four selftests for the new API. Link: http://lkml.kernel.org/r/20191030154313.13263-6-pmladek@suse.com To: Jiri Kosina Cc: Kamalesh Babulal Cc: Nicolai Stange Cc: live-patching@vger.kernel.org Cc: linux-kernel@vger.kernel.org Acked-by: Miroslav Benes Acked-by: Joe Lawrence Acked-by: Josh Poimboeuf Signed-off-by: Petr Mladek

livepatch: Proper error handling in the shadow variables selftest

2019-02-06T10:01:57Z

Add proper error handling when allocating or getting shadow variables in the selftest. It prevents an invalid pointer access in some situations. It shows the good programming practice in the others. The error codes are just the best guess and specific for this particular test. In general, klp_shadow_alloc() returns NULL also when the given shadow variable has already been allocated. In addition, both klp_shadow_alloc() and klp_shadow_get_or_alloc() might fail from other reasons when the constructor fails. Note, that the error code is not really important even in the real life. The use of shadow variables should be transparent for the original livepatched code. Acked-by: Miroslav Benes Acked-by: Joe Lawrence Signed-off-by: Petr Mladek

livepatch: return -ENOMEM on ptr_id() allocation failure

2019-02-06T10:00:58Z

Fixes the following smatch warning: lib/livepatch/test_klp_shadow_vars.c:47 ptr_id() warn: returning -1 instead of -ENOMEM is sloppy Signed-off-by: Joe Lawrence Acked-by: Miroslav Benes Signed-off-by: Petr Mladek

selftests/livepatch: introduce tests

2019-01-11T19:51:24Z

Add a few livepatch modules and simple target modules that the included regression suite can run tests against: - basic livepatching (multiple patches, atomic replace) - pre/post (un)patch callbacks - shadow variable API Signed-off-by: Joe Lawrence Signed-off-by: Petr Mladek Tested-by: Miroslav Benes Tested-by: Alice Ferrazzi Acked-by: Joe Lawrence Acked-by: Josh Poimboeuf Signed-off-by: Jiri Kosina