9p: potential ERR_PTR() dereference

p9_client_walk() can return error values if we run out of space or there
is a problem with the network.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/fs/9p/fid.c b/fs/9p/fid.c
index 358563689064..6406f896bf95 100644
--- a/fs/9p/fid.c
+++ b/fs/9p/fid.c
@@ -242,7 +242,8 @@ struct p9_fid *v9fs_fid_lookup(struct dentry *dentry)
         }
         kfree(wnames);
 fid_out:
-        v9fs_fid_add(dentry, fid);
+        if (!IS_ERR(fid))
+                v9fs_fid_add(dentry, fid);
 err_out:
         up_read(&v9ses->rename_sem);
         return fid;