From eda10260a05f19b7507ffd531fd435fc48c2c9b4 Mon Sep 17 00:00:00 2001
From: Yaping Li <202858510+YapingLi04@users.noreply.github.com>
Date: Sun, 10 May 2026 14:50:13 +0000
Subject: [PATCH] logind: zero-initialize dispatch struct in
 vl_method_release_session()

The local struct passed to sd_varlink_dispatch() was not
zero-initialized. Since sd_json_dispatch_full() does not call handlers
for absent optional fields, p.id could be left indeterminate when
the client omits the Id parameter, leading to use of uninitialized
memory.
---
 src/login/logind-varlink.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/login/logind-varlink.c b/src/login/logind-varlink.c
index 56b02b4eb2..71a445e900 100644
--- a/src/login/logind-varlink.c
+++ b/src/login/logind-varlink.c
@@ -310,7 +310,7 @@ static int vl_method_release_session(sd_varlink *link, sd_json_variant *paramete
 
         struct {
                 const char *id;
-        } p;
+        } p = {};
 
         static const sd_json_dispatch_field dispatch_table[] = {
                 { "Id", SD_JSON_VARIANT_STRING, sd_json_dispatch_const_string, voffsetof(p, id), 0 },