linux-kernel - [PATCH][ocfs2-next] ocfs2: ensure ret is set to zero before returning

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Message-Id: <20190807121929.28918-1-colin.king@canonical.com>
Date:   Wed,  7 Aug 2019 13:19:29 +0100
From:   Colin King <colin.king@...onical.com>
To:     Mark Fasheh <mark@...heh.com>, Joel Becker <jlbec@...lplan.org>,
        Joseph Qi <joseph.qi@...ux.alibaba.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        ocfs2-devel@....oracle.com
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][ocfs2-next] ocfs2: ensure ret is set to zero before returning

From: Colin Ian King <colin.king@...onical.com>

A previous commit introduced a regression where variable ret was
originally being set from the return from a call to function
dlm_create_debugfs_subroot and this set was removed. Currently
ret is now uninitialized if no alloction errors are found which
may end up with a bogus check on ret < 0 on the 'leave:' return
path.  Fix this by setting ret to zero on a successful execution
path.

Addresses-Coverity: ("Uninitialzed scalar variable")
Fixes: cba322160ef0 ("ocfs2: further debugfs cleanups")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 fs/ocfs2/dlm/dlmdomain.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c
index 5c4218d66dd2..ee6f459f9770 100644
--- a/fs/ocfs2/dlm/dlmdomain.c
+++ b/fs/ocfs2/dlm/dlmdomain.c
@@ -2052,6 +2052,7 @@ static struct dlm_ctxt *dlm_alloc_ctxt(const char *domain,
 	mlog(0, "context init: refcount %u\n",
 		  kref_read(&dlm->dlm_refs));
 
+	ret = 0;
 leave:
 	if (ret < 0 && dlm) {
 		if (dlm->master_hash)
-- 
2.20.1