FAILED: patch "[PATCH] excessive checks in ufs_write_failed() and ufs_evict_inode()" failed to apply to 4.4-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 4.4-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

>From babef37dccbaa49249a22bae9150686815d7be71 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 9 Jun 2017 16:20:34 -0400
Subject: [PATCH] excessive checks in ufs_write_failed() and ufs_evict_inode()

As it is, short copy in write() to append-only file will fail
to truncate the excessive allocated blocks.  As the matter of
fact, all checks in ufs_truncate_blocks() are either redundant
or wrong for that caller.  As for the only other caller
(ufs_evict_inode()), we only need the file type checks there.

Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c
index 9bf10285c628..34f11cf0900a 100644
--- a/fs/ufs/inode.c
+++ b/fs/ufs/inode.c
@@ -844,7 +844,9 @@ void ufs_evict_inode(struct inode * inode)
 	truncate_inode_pages_final(&inode->i_data);
 	if (want_delete) {
 		inode->i_size = 0;
-		if (inode->i_blocks)
+		if (inode->i_blocks &&
+		    (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
+		     S_ISLNK(inode->i_mode)))
 			ufs_truncate_blocks(inode);
 	}
 
@@ -1103,7 +1105,7 @@ static int ufs_alloc_lastblock(struct inode *inode, loff_t size)
        return err;
 }
 
-static void __ufs_truncate_blocks(struct inode *inode)
+static void ufs_truncate_blocks(struct inode *inode)
 {
 	struct ufs_inode_info *ufsi = UFS_I(inode);
 	struct super_block *sb = inode->i_sb;
@@ -1186,7 +1188,7 @@ static int ufs_truncate(struct inode *inode, loff_t size)
 
 	truncate_setsize(inode, size);
 
-	__ufs_truncate_blocks(inode);
+	ufs_truncate_blocks(inode);
 	inode->i_mtime = inode->i_ctime = current_time(inode);
 	mark_inode_dirty(inode);
 out:
@@ -1194,16 +1196,6 @@ static int ufs_truncate(struct inode *inode, loff_t size)
 	return err;
 }
 
-static void ufs_truncate_blocks(struct inode *inode)
-{
-	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
-	      S_ISLNK(inode->i_mode)))
-		return;
-	if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
-		return;
-	__ufs_truncate_blocks(inode);
-}
-
 int ufs_setattr(struct dentry *dentry, struct iattr *attr)
 {
 	struct inode *inode = d_inode(dentry);