->d_revalidate() bails out there, anyway. It's not enough
to prevent getting into ->get_link() in RCU mode, but that
could happen only in a very contrieved setup. Not worth
trying to do anything fancy here unless ->d_revalidate()
stops kicking out of RCU mode at least in some cases.
Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
---
fs/smb/client/cifsfs.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/smb/client/cifsfs.c b/fs/smb/client/cifsfs.c
index 22869cda1356..2b044e47a3a6 100644
--- a/fs/smb/client/cifsfs.c
+++ b/fs/smb/client/cifsfs.c
@@ -1170,6 +1170,9 @@ const char *cifs_get_link(struct dentry *dentry, struct inode *inode,
{
char *target_path;
+ if (!dentry)
+ return ERR_PTR(-ECHILD);
+
target_path = kmalloc(PATH_MAX, GFP_KERNEL);
if (!target_path)
return ERR_PTR(-ENOMEM);
--
2.39.2
