Patch "ext4: fix error return from ext4_ext_handle_uninitialized_extents()" has been added to the 3.14-stable tree

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This is a note to let you know that I've just added the patch titled

    ext4: fix error return from ext4_ext_handle_uninitialized_extents()

to the 3.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     ext4-fix-error-return-from-ext4_ext_handle_uninitialized_extents.patch
and it can be found in the queue-3.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From ce37c42919608e96ade3748fe23c3062a0a966c5 Mon Sep 17 00:00:00 2001
From: Eric Whitney <enwlinux@xxxxxxxxx>
Date: Wed, 19 Feb 2014 18:52:39 -0500
Subject: ext4: fix error return from ext4_ext_handle_uninitialized_extents()

From: Eric Whitney <enwlinux@xxxxxxxxx>

commit ce37c42919608e96ade3748fe23c3062a0a966c5 upstream.

Commit 3779473246 breaks the return of error codes from
ext4_ext_handle_uninitialized_extents() in ext4_ext_map_blocks().  A
portion of the patch assigns that function's signed integer return
value to an unsigned int.  Consequently, negatively valued error codes
are lost and can be treated as a bogus allocated block count.

Signed-off-by: Eric Whitney <enwlinux@xxxxxxxxx>
Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 fs/ext4/extents.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -4128,7 +4128,7 @@ int ext4_ext_map_blocks(handle_t *handle
 	struct ext4_extent newex, *ex, *ex2;
 	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
 	ext4_fsblk_t newblock = 0;
-	int free_on_err = 0, err = 0, depth;
+	int free_on_err = 0, err = 0, depth, ret;
 	unsigned int allocated = 0, offset = 0;
 	unsigned int allocated_clusters = 0;
 	struct ext4_allocation_request ar;
@@ -4189,9 +4189,13 @@ int ext4_ext_map_blocks(handle_t *handle
 			if (!ext4_ext_is_uninitialized(ex))
 				goto out;
 
-			allocated = ext4_ext_handle_uninitialized_extents(
+			ret = ext4_ext_handle_uninitialized_extents(
 				handle, inode, map, path, flags,
 				allocated, newblock);
+			if (ret < 0)
+				err = ret;
+			else
+				allocated = ret;
 			goto out3;
 		}
 	}


Patches currently in stable-queue which might be from enwlinux@xxxxxxxxx are

queue-3.14/ext4-fix-partial-cluster-handling-for-bigalloc-file-systems.patch
queue-3.14/ext4-fix-premature-freeing-of-partial-clusters-split-across-leaf-blocks.patch
queue-3.14/ext4-fix-error-return-from-ext4_ext_handle_uninitialized_extents.patch
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