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livepatch: Module coming and going callbacks can proceed with all listed patches

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Livepatches can no longer get enabled and disabled repeatedly.
The list klp_patches contains only enabled patches and eventually
the patch in transition.

The module coming and going callbacks do no longer need to check
for these state. They have to proceed with all listed patches.

Suggested-by: Josh Poimboeuf <jpoimboe@redhat.com>
Acked-by: Miroslav Benes <mbenes@suse.cz>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
This commit is contained in:
Petr Mladek 2019-02-04 14:56:53 +01:00
parent 49ee4dd2e7
commit a087cdd407
1 changed files with 6 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
kernel/livepatch/core.c
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@ -1141,21 +1141,14 @@ static void klp_cleanup_module_patches_limited(struct module *mod,
if (!klp_is_module(obj) || strcmp(obj->name, mod->name))
continue;
/*
* Only unpatch the module if the patch is enabled or
* is in transition.
*/
if (patch->enabled || patch == klp_transition_patch) {
if (patch != klp_transition_patch)
klp_pre_unpatch_callback(obj);
if (patch != klp_transition_patch)
klp_pre_unpatch_callback(obj);
pr_notice("reverting patch '%s' on unloading module '%s'\n",
patch->mod->name, obj->mod->name);
klp_unpatch_object(obj);
pr_notice("reverting patch '%s' on unloading module '%s'\n",
patch->mod->name, obj->mod->name);
klp_unpatch_object(obj);
klp_post_unpatch_callback(obj);
}
klp_post_unpatch_callback(obj);
klp_free_object_loaded(obj);
break;
@ -1194,13 +1187,6 @@ int klp_module_coming(struct module *mod)
goto err;
}
/*
* Only patch the module if the patch is enabled or is
* in transition.
*/
if (!patch->enabled && patch != klp_transition_patch)
break;
pr_notice("applying patch '%s' to loading module '%s'\n",
patch->mod->name, obj->mod->name);