From d54f1e4329aa2b80107383f99253f5f3df9f1f84 Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Sat, 26 Jul 2025 02:23:52 +0900
Subject: [PATCH] cpu-set-util: check if cpu set is already allocated

Prompted by CID#1611789, CID#1611790, and CID#1611791.
---
 src/shared/cpu-set-util.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/shared/cpu-set-util.c b/src/shared/cpu-set-util.c
index cef23889ca..222e4b7e17 100644
--- a/src/shared/cpu-set-util.c
+++ b/src/shared/cpu-set-util.c
@@ -133,8 +133,10 @@ int cpu_set_realloc(CPUSet *c, size_t n) {
                 return -ERANGE;
 
         n = CPU_ALLOC_SIZE(n);
-        if (n <= c->allocated)
+        if (n <= c->allocated) {
+                assert(c->set || n == 0);
                 return 0;
+        }
 
         if (!GREEDY_REALLOC0(c->set, DIV_ROUND_UP(n, sizeof(cpu_set_t))))
                 return -ENOMEM;