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-rw-r--r--fs/overlayfs/inode.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index 4060ffde8722..38a0b8b9f8b9 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -137,17 +137,21 @@ struct ovl_link_data {
137 void *cookie; 137 void *cookie;
138}; 138};
139 139
140static const char *ovl_follow_link(struct dentry *dentry, void **cookie) 140static const char *ovl_get_link(struct dentry *dentry,
141 struct inode *inode, void **cookie)
141{ 142{
142 struct dentry *realdentry; 143 struct dentry *realdentry;
143 struct inode *realinode; 144 struct inode *realinode;
144 struct ovl_link_data *data = NULL; 145 struct ovl_link_data *data = NULL;
145 const char *ret; 146 const char *ret;
146 147
148 if (!dentry)
149 return ERR_PTR(-ECHILD);
150
147 realdentry = ovl_dentry_real(dentry); 151 realdentry = ovl_dentry_real(dentry);
148 realinode = realdentry->d_inode; 152 realinode = realdentry->d_inode;
149 153
150 if (WARN_ON(!realinode->i_op->follow_link)) 154 if (WARN_ON(!realinode->i_op->get_link))
151 return ERR_PTR(-EPERM); 155 return ERR_PTR(-EPERM);
152 156
153 if (realinode->i_op->put_link) { 157 if (realinode->i_op->put_link) {
@@ -157,7 +161,7 @@ static const char *ovl_follow_link(struct dentry *dentry, void **cookie)
157 data->realdentry = realdentry; 161 data->realdentry = realdentry;
158 } 162 }
159 163
160 ret = realinode->i_op->follow_link(realdentry, cookie); 164 ret = realinode->i_op->get_link(realdentry, realinode, cookie);
161 if (IS_ERR_OR_NULL(ret)) { 165 if (IS_ERR_OR_NULL(ret)) {
162 kfree(data); 166 kfree(data);
163 return ret; 167 return ret;
@@ -378,7 +382,7 @@ static const struct inode_operations ovl_file_inode_operations = {
378 382
379static const struct inode_operations ovl_symlink_inode_operations = { 383static const struct inode_operations ovl_symlink_inode_operations = {
380 .setattr = ovl_setattr, 384 .setattr = ovl_setattr,
381 .follow_link = ovl_follow_link, 385 .get_link = ovl_get_link,
382 .put_link = ovl_put_link, 386 .put_link = ovl_put_link,
383 .readlink = ovl_readlink, 387 .readlink = ovl_readlink,
384 .getattr = ovl_getattr, 388 .getattr = ovl_getattr,