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-rw-r--r--fs/fuse/dir.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 3a47247a889e..51f5da652771 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -87,6 +87,11 @@ static int dir_alias(struct inode *inode)
return 0;
}
+static inline int invalid_nodeid(u64 nodeid)
+{
+ return !nodeid || nodeid == FUSE_ROOT_ID;
+}
+
static struct dentry_operations fuse_dentry_operations = {
.d_revalidate = fuse_dentry_revalidate,
};
@@ -110,7 +115,7 @@ static int fuse_lookup_iget(struct inode *dir, struct dentry *entry,
fuse_lookup_init(req, dir, entry, &outarg);
request_send(fc, req);
err = req->out.h.error;
- if (!err && (!outarg.nodeid || outarg.nodeid == FUSE_ROOT_ID))
+ if (!err && invalid_nodeid(outarg.nodeid))
err = -EIO;
if (!err) {
inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation,
@@ -206,7 +211,7 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode,
}
err = -EIO;
- if (!S_ISREG(outentry.attr.mode))
+ if (!S_ISREG(outentry.attr.mode) || invalid_nodeid(outentry.nodeid))
goto out_free_ff;
inode = fuse_iget(dir->i_sb, outentry.nodeid, outentry.generation,
@@ -263,7 +268,7 @@ static int create_new_entry(struct fuse_conn *fc, struct fuse_req *req,
fuse_put_request(fc, req);
return err;
}
- if (!outarg.nodeid || outarg.nodeid == FUSE_ROOT_ID) {
+ if (invalid_nodeid(outarg.nodeid)) {
fuse_put_request(fc, req);
return -EIO;
}
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