linux-kernel - [PATCH 055/190] Revert "fs: ocfs: remove unnecessary assertion in dlm_migrate

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Message-Id: <20210421130105.1226686-56-gregkh@linuxfoundation.org>
Date:   Wed, 21 Apr 2021 14:58:50 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Aditya Pakki <pakki001@....edu>, Mark Fasheh <mark@...heh.com>,
        Joel Becker <jlbec@...lplan.org>,
        Junxiao Bi <junxiao.bi@...cle.com>,
        Joseph Qi <jiangqi903@...il.com>,
        Changwei Ge <gechangwei@...e.cn>, Gang He <ghe@...e.com>,
        Jun Piao <piaojun@...wei.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [PATCH 055/190] Revert "fs: ocfs: remove unnecessary assertion in dlm_migrate_lockres"

This reverts commit 67e2d2eb542338145a2e0b2336c1cdabd2424fd3.

Commits from @umn.edu addresses have been found to be submitted in "bad
faith" to try to test the kernel community's ability to review "known
malicious" changes.  The result of these submissions can be found in a
paper published at the 42nd IEEE Symposium on Security and Privacy
entitled, "Open Source Insecurity: Stealthily Introducing
Vulnerabilities via Hypocrite Commits" written by Qiushi Wu (University
of Minnesota) and Kangjie Lu (University of Minnesota).

Because of this, all submissions from this group must be reverted from
the kernel tree and will need to be re-reviewed again to determine if
they actually are a valid fix.  Until that work is complete, remove this
change to ensure that no problems are being introduced into the
codebase.

Cc: http
Cc: Aditya Pakki <pakki001@....edu>
Cc: Mark Fasheh <mark@...heh.com>
Cc: Joel Becker <jlbec@...lplan.org>
Cc: Junxiao Bi <junxiao.bi@...cle.com>
Cc: Joseph Qi <jiangqi903@...il.com>
Cc: Changwei Ge <gechangwei@...e.cn>
Cc: Gang He <ghe@...e.com>
Cc: Jun Piao <piaojun@...wei.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 fs/ocfs2/dlm/dlmmaster.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c
index f105746063ed..f89dcf9b6217 100644
--- a/fs/ocfs2/dlm/dlmmaster.c
+++ b/fs/ocfs2/dlm/dlmmaster.c
@@ -2554,6 +2554,8 @@ static int dlm_migrate_lockres(struct dlm_ctxt *dlm,
 	if (!dlm_grab(dlm))
 		return -EINVAL;

+	BUG_ON(target == O2NM_MAX_NODES);
+
 	name = res->lockname.name;
 	namelen = res->lockname.len;

-- 
2.31.1