[4.2.y-ckt stable] Patch "fix the regression from "direct-io: Fix negative return from dio read beyond eof"" has been added to staging queue

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    fix the regression from "direct-io: Fix negative return from dio read beyond eof"

to the linux-4.2.y-queue branch of the 4.2.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-4.2.y-queue

This patch is scheduled to be released in version 4.2.8-ckt2.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 4.2.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

---8<------------------------------------------------------------

>From 2d02e002a0e978dd5457044e0c1159cfd2800fed Mon Sep 17 00:00:00 2001
From: Al Viro <viro at zeniv.linux.org.uk>
Date: Tue, 8 Dec 2015 12:22:47 -0500
Subject: fix the regression from "direct-io: Fix negative return from dio read
 beyond eof"

commit 2d4594acbf6d8f75a27f3578476b6a27d8b13ebb upstream.

Sure, it's better to bail out of past-the-eof read and return 0 than return
a bogus negative value on such.  Only we'd better make sure we are bailing out
with 0 and not -ENOMEM...

Signed-off-by: Al Viro <viro at zeniv.linux.org.uk>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 fs/direct-io.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/direct-io.c b/fs/direct-io.c
index 6bc4bac..d83a021 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -1165,6 +1165,7 @@ do_blockdev_direct_IO(struct kiocb *iocb, struct inode *inode,
 		if (dio->flags & DIO_LOCKING)
 			mutex_unlock(&inode->i_mutex);
 		kmem_cache_free(dio_cache, dio);
+		retval = 0;
 		goto out;
 	}

--
1.9.1