From 8a70ee3307908c46f952df91be72a18d5f5ad0a3 Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Thu, 4 Sep 2014 11:47:51 +0200 Subject: [PATCH] udf: Avoid dir link count to go negative If we are writing back inode of unlinked directory, its link count ends up being (u16)-1. Although the inode is deleted, udf_iget() can load the inode when NFS uses stale file handle and get confused. Signed-off-by: Jan Kara --- fs/udf/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/udf/inode.c b/fs/udf/inode.c index 236cd48184c2..e86f9b67aa16 100644 --- a/fs/udf/inode.c +++ b/fs/udf/inode.c @@ -1664,7 +1664,7 @@ static int udf_update_inode(struct inode *inode, int do_sync) FE_PERM_U_DELETE | FE_PERM_U_CHATTR)); fe->permissions = cpu_to_le32(udfperms); - if (S_ISDIR(inode->i_mode)) + if (S_ISDIR(inode->i_mode) && inode->i_nlink > 0) fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); else fe->fileLinkCount = cpu_to_le16(inode->i_nlink);