linux-kernel - [PATCH] ceph: Fix NULL vs IS_ERR checking in ceph

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Message-Id: <20221110031311.1629288-1-linmq006@gmail.com>
Date:   Thu, 10 Nov 2022 07:13:10 +0400
From:   Miaoqian Lin <linmq006@...il.com>
To:     Xiubo Li <xiubli@...hat.com>, Ilya Dryomov <idryomov@...il.com>,
        Jeff Layton <jlayton@...nel.org>, ceph-devel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     linmq006@...il.com
Subject: [PATCH] ceph: Fix NULL vs IS_ERR checking in ceph_getattr

The ceph_lookup_inode() function return error pointers on error
instead of NULL.
Use IS_ERR() to check the return value to fix this.

Fixes: aa87052dd965 ("ceph: fix incorrectly showing the .snap size for stat")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 fs/ceph/inode.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 4af5e55abc15..bad9eeb6a1a5 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -2492,7 +2492,7 @@ int ceph_getattr(struct user_namespace *mnt_userns, const struct path *path,
 			struct inode *parent;
 
 			parent = ceph_lookup_inode(sb, ceph_ino(inode));
-			if (!parent)
+			if (IS_ERR(parent))
 				return PTR_ERR(parent);
 
 			pci = ceph_inode(parent);
-- 
2.37.3.671.ge2130fe6da78.dirty