[CIFS] Fix unlink oops when indirectly called in rename error path

under heavy stress.

Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index e842ce9f6547..ca91ea38d611 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -569,7 +569,10 @@ int cifs_unlink(struct inode *inode, struct dentry *direntry)
 
         xid = GetXid();
 
-        cifs_sb = CIFS_SB(inode->i_sb);
+        if(inode)
+                cifs_sb = CIFS_SB(inode->i_sb);
+        else
+                cifs_sb = CIFS_SB(dentry->d_sb);
         pTcon = cifs_sb->tcon;
 
         /* Unlink can be called from rename so we can not grab the sem here