Commit 4ff96fb5 authored by Miroslav Benes's avatar Miroslav Benes Committed by Petr Mladek
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livepatch: Nullify obj->mod in klp_module_coming()'s error path



klp_module_coming() is called for every module appearing in the system.
It sets obj->mod to a patched module for klp_object obj. Unfortunately
it leaves it set even if an error happens later in the function and the
patched module is not allowed to be loaded.

klp_is_object_loaded() uses obj->mod variable and could currently give a
wrong return value. The bug is probably harmless as of now.
Signed-off-by: default avatarMiroslav Benes <mbenes@suse.cz>
Reviewed-by: default avatarPetr Mladek <pmladek@suse.com>
Acked-by: default avatarJosh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: default avatarPetr Mladek <pmladek@suse.com>
parent db045733
...@@ -1175,6 +1175,7 @@ int klp_module_coming(struct module *mod) ...@@ -1175,6 +1175,7 @@ int klp_module_coming(struct module *mod)
pr_warn("patch '%s' failed for module '%s', refusing to load module '%s'\n", pr_warn("patch '%s' failed for module '%s', refusing to load module '%s'\n",
patch->mod->name, obj->mod->name, obj->mod->name); patch->mod->name, obj->mod->name, obj->mod->name);
mod->klp_alive = false; mod->klp_alive = false;
obj->mod = NULL;
klp_cleanup_module_patches_limited(mod, patch); klp_cleanup_module_patches_limited(mod, patch);
mutex_unlock(&klp_mutex); mutex_unlock(&klp_mutex);
......
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