path: root/kernel
diff options
authorMiroslav Benes <>2019-07-19 14:28:39 +0200
committerPetr Mladek <>2019-08-19 13:03:37 +0200
commit4ff96fb52c6964ad42e0a878be8f86a2e8052ddd (patch)
tree1edd4428f19b91a2456bf96d5865052a632aff63 /kernel
parentdb0457338ece7482378d88e50ad298191c3e6947 (diff)
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: Miroslav Benes <> Reviewed-by: Petr Mladek <> Acked-by: Josh Poimboeuf <> Signed-off-by: Petr Mladek <>
Diffstat (limited to 'kernel')
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c
index c4ce08f43bd6..ab4a4606d19b 100644
--- a/kernel/livepatch/core.c
+++ b/kernel/livepatch/core.c
@@ -1175,6 +1175,7 @@ err:
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);