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livepatch: fix deferred module patching order

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When applying multiple patches to a module, if the module is loaded
after the patches are loaded, the patches are applied in reverse order:

  $ insmod patch1.ko
  [   43.172992] livepatch: enabling patch 'patch1'

  $ insmod patch2.ko
  [   46.571563] livepatch: enabling patch 'patch2'

  $ modprobe nfsd
  [   52.888922] livepatch: applying patch 'patch2' to loading module 'nfsd'
  [   52.899847] livepatch: applying patch 'patch1' to loading module 'nfsd'

Fix the loading order by storing the klp_patches list in queue order.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Josh Poimboeuf 2015-01-09 14:03:04 -06:00 committed by Jiri Kosina
parent b9dfe0bed9
commit 99590ba565
1 changed files with 1 additions and 1 deletions
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2
kernel/livepatch/core.c
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@ -739,7 +739,7 @@ static int klp_init_patch(struct klp_patch *patch)
goto free;
}
list_add(&patch->list, &klp_patches);
list_add_tail(&patch->list, &klp_patches);
mutex_unlock(&klp_mutex);