Re: [PATCH] ceph: fix a NULL vs IS_ERR() check

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On 14/10/2022 17:36, Dan Carpenter wrote:
The ceph_lookup_inode() function returns error pointers.  It never
returns NULL.

Fixes: aa87052dd965 ("ceph: fix incorrectly showing the .snap size for stat")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
  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);

Good catch!

Will merge it to the testing branch soon.

Thanks Dan.

- Xiubo





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