From: Xiubo Li <xiubli@redhat.com>
Date: Fri, 12 Mar 2021 15:39:21 +0000 (+0800)
Subject: lockdep: fix follows/follows_bt resize() size
X-Git-Tag: v17.1.0~2591^2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=refs%2Fpull%2F40070%2Fhead;p=ceph.git

lockdep: fix follows/follows_bt resize() size

Without this the size of follows/follows_bt won't ever change, and
if the total lock number larger than 4094 it will cause crash in
lockdep_will_lock().

Signed-off-by: Xiubo Li <xiubli@redhat.com>
---

diff --git a/src/common/lockdep.cc b/src/common/lockdep.cc
index 241e2ea3c140c..18d0cde09c889 100644
--- a/src/common/lockdep.cc
+++ b/src/common/lockdep.cc
@@ -172,8 +172,8 @@ static int _lockdep_register(const char *name)
     if (current_maxid <= (unsigned)id) {
       current_maxid = (unsigned)id + 1;
       if (current_maxid == follows.size()) {
-        follows.resize(current_maxid);
-        follows_bt.resize(current_maxid);
+        follows.resize(current_maxid + 1);
+        follows_bt.resize(current_maxid + 1);
       }
     }
     lock_ids[name] = id;