linux-kernel - [PATCH 3.16 211/305] exportfs: fix 'passing zero to ERR

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Date:   Sun, 03 Feb 2019 14:45:08 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        "YueHaibing" <yuehaibing@...wei.com>,
        "Al Viro" <viro@...iv.linux.org.uk>
Subject: [PATCH 3.16 211/305] exportfs: fix 'passing zero to ERR_PTR()'
 warning

3.16.63-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: YueHaibing <yuehaibing@...wei.com>

commit 909e22e05353a783c526829427e9a8de122fba9c upstream.

Fix a static code checker warning:
  fs/exportfs/expfs.c:171 reconnect_one() warn: passing zero to 'ERR_PTR'

The error path for lookup_one_len_unlocked failure
should set err to PTR_ERR.

Fixes: bbf7a8a3562f ("exportfs: move most of reconnect_path to helper function")
Signed-off-by: YueHaibing <yuehaibing@...wei.com>
Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 fs/exportfs/expfs.c | 1 +
 1 file changed, 1 insertion(+)

--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -148,6 +148,7 @@ static struct dentry *reconnect_one(stru
 	mutex_unlock(&parent->d_inode->i_mutex);
 	if (IS_ERR(tmp)) {
 		dprintk("%s: lookup failed: %d\n", __func__, PTR_ERR(tmp));
+		err = PTR_ERR(tmp);
 		goto out_err;
 	}
 	if (tmp != dentry) {