Commit 0f0ced70 authored by Miroslav Benes's avatar Miroslav Benes Committed by Greg Kroah-Hartman
Browse files

livepatch: Nullify obj->mod in klp_module_coming()'s error path

[ Upstream commit 4ff96fb5

 ]

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>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 78a11386
......@@ -1027,6 +1027,7 @@ int klp_module_coming(struct module *mod)
pr_warn("patch '%s' failed for module '%s', refusing to load module '%s'\n",
patch->mod->name, obj->mod->name, obj->mod->name);
mod->klp_alive = false;
obj->mod = NULL;
klp_cleanup_module_patches_limited(mod, patch);
mutex_unlock(&klp_mutex);
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment