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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Colin Ian King <colin.king@canonical.com>,
        "Paulo Alcantara (SUSE)" <pc@cjr.nz>,
        Steve French <stfrench@microsoft.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.5 349/399] cifs: fix unitialized variable poential problem with network I/O cache lock patch
Date:   Fri, 21 Feb 2020 08:41:14 +0100
Message-Id: <20200221072435.057352137@linuxfoundation.org>
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From: Steve French <stfrench@microsoft.com>

[ Upstream commit 463a7b457c02250a84faa1d23c52da9e3364aed2 ]

static analysis with Coverity detected an issue with the following
commit:

 Author: Paulo Alcantara (SUSE) <pc@cjr.nz>
 Date:   Wed Dec 4 17:38:03 2019 -0300

    cifs: Avoid doing network I/O while holding cache lock

Addresses-Coverity: ("Uninitialized pointer read")
Reported-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/cifs/dfs_cache.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/cifs/dfs_cache.c b/fs/cifs/dfs_cache.c
index 2faa05860a483..cf6cec59696c2 100644
--- a/fs/cifs/dfs_cache.c
+++ b/fs/cifs/dfs_cache.c
@@ -1319,7 +1319,7 @@ static struct cifs_ses *find_root_ses(struct dfs_cache_vol_info *vi,
 	char *mdata = NULL, *devname = NULL;
 	struct TCP_Server_Info *server;
 	struct cifs_ses *ses;
-	struct smb_vol vol;
+	struct smb_vol vol = {NULL};
 
 	rpath = get_dfs_root(path);
 	if (IS_ERR(rpath))
-- 
2.20.1